/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 18:40:43,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 18:40:43,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 18:40:43,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-03 18:40:43,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-03 18:40:43,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-03 18:40:43,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-03 18:40:43,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-03 18:40:43,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-03 18:40:43,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-03 18:40:43,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-03 18:40:43,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-03 18:40:43,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 18:40:43,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 18:40:43,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 18:40:43,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 18:40:43,167 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 18:40:43,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 18:40:43,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 18:40:43,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 18:40:43,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 18:40:43,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 18:40:43,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 18:40:43,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 18:40:43,169 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 18:40:43,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 18:40:43,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 18:40:43,170 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 18:40:43,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 18:40:43,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 18:40:43,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 18:40:43,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 18:40:43,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 18:40:43,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:40:43,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 18:40:43,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 18:40:43,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 18:40:43,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 18:40:43,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 18:40:43,172 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 18:40:43,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 18:40:43,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 18:40:43,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 18:40:43,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 18:40:43,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 18:40:43,390 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 18:40:43,391 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 18:40:43,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2022-03-03 18:40:43,392 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2022-03-03 18:40:43,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 18:40:43,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 18:40:43,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 18:40:43,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 18:40:43,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 18:40:43,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,442 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 18:40:43,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 18:40:43,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 18:40:43,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 18:40:43,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 18:40:43,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 18:40:43,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 18:40:43,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 18:40:43,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 18:40:43,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/1) ... [2022-03-03 18:40:43,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:40:43,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:43,501 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) [2022-03-03 18:40:43,514 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 [2022-03-03 18:40:43,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 18:40:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 18:40:43,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 18:40:43,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 18:40:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 18:40:43,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 18:40:43,543 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 18:40:43,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 18:40:43,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 18:40:43,544 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 18:40:43,590 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 18:40:43,592 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 18:40:43,691 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 18:40:43,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 18:40:43,714 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-03 18:40:43,716 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:40:43 BoogieIcfgContainer [2022-03-03 18:40:43,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 18:40:43,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 18:40:43,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 18:40:43,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 18:40:43,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:40:43" (1/2) ... [2022-03-03 18:40:43,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e714f90 and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 06:40:43, skipping insertion in model container [2022-03-03 18:40:43,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:40:43" (2/2) ... [2022-03-03 18:40:43,724 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2022-03-03 18:40:43,729 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 18:40:43,729 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 18:40:43,729 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 18:40:43,729 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 18:40:43,756 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 18:40:43,795 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 18:40:43,804 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 18:40:43,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 18:40:43,812 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2022-03-03 18:40:43,834 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 18:40:43,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:43,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:43,845 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1080708855, now seen corresponding path program 1 times [2022-03-03 18:40:43,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:43,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656762408] [2022-03-03 18:40:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:44,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:44,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656762408] [2022-03-03 18:40:44,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656762408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:44,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:44,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 18:40:44,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021101951] [2022-03-03 18:40:44,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:44,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:44,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:44,277 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:44,417 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2022-03-03 18:40:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:44,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 18:40:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:44,427 INFO L225 Difference]: With dead ends: 61 [2022-03-03 18:40:44,443 INFO L226 Difference]: Without dead ends: 54 [2022-03-03 18:40:44,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:40:44,449 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:44,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-03 18:40:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2022-03-03 18:40:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2022-03-03 18:40:44,499 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2022-03-03 18:40:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:44,500 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2022-03-03 18:40:44,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2022-03-03 18:40:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 18:40:44,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:44,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:44,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 18:40:44,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1086170513, now seen corresponding path program 2 times [2022-03-03 18:40:44,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:44,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488421327] [2022-03-03 18:40:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:44,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:44,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:44,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488421327] [2022-03-03 18:40:44,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488421327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:44,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:44,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 18:40:44,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081299998] [2022-03-03 18:40:44,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:44,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:44,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:44,678 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:44,770 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2022-03-03 18:40:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:44,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 18:40:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:44,772 INFO L225 Difference]: With dead ends: 52 [2022-03-03 18:40:44,772 INFO L226 Difference]: Without dead ends: 45 [2022-03-03 18:40:44,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:40:44,776 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:44,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-03 18:40:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-03 18:40:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2022-03-03 18:40:44,787 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2022-03-03 18:40:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:44,788 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2022-03-03 18:40:44,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2022-03-03 18:40:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:44,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:44,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:44,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 18:40:44,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:44,790 INFO L85 PathProgramCache]: Analyzing trace with hash -831143929, now seen corresponding path program 1 times [2022-03-03 18:40:44,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:44,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976974583] [2022-03-03 18:40:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:44,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:44,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:44,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976974583] [2022-03-03 18:40:44,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976974583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:44,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:44,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:44,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343947909] [2022-03-03 18:40:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:44,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:44,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:44,873 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:44,967 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2022-03-03 18:40:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:44,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:44,971 INFO L225 Difference]: With dead ends: 63 [2022-03-03 18:40:44,971 INFO L226 Difference]: Without dead ends: 55 [2022-03-03 18:40:44,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:40:44,974 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:44,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-03 18:40:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-03-03 18:40:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 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) [2022-03-03 18:40:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2022-03-03 18:40:44,982 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2022-03-03 18:40:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:44,983 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2022-03-03 18:40:44,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2022-03-03 18:40:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:44,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:44,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:44,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 18:40:44,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1760303081, now seen corresponding path program 1 times [2022-03-03 18:40:44,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:44,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168903741] [2022-03-03 18:40:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:45,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168903741] [2022-03-03 18:40:45,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168903741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:45,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170494002] [2022-03-03 18:40:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:45,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:45,021 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) [2022-03-03 18:40:45,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 18:40:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 18:40:45,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170494002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:45,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:45,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 18:40:45,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183570687] [2022-03-03 18:40:45,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:45,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 18:40:45,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:45,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 18:40:45,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:40:45,188 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2022-03-03 18:40:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:45,263 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2022-03-03 18:40:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:45,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 14 [2022-03-03 18:40:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:45,265 INFO L225 Difference]: With dead ends: 59 [2022-03-03 18:40:45,266 INFO L226 Difference]: Without dead ends: 59 [2022-03-03 18:40:45,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:40:45,272 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:45,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-03 18:40:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2022-03-03 18:40:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 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) [2022-03-03 18:40:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2022-03-03 18:40:45,281 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2022-03-03 18:40:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:45,281 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2022-03-03 18:40:45,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2022-03-03 18:40:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2022-03-03 18:40:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:45,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:45,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:45,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:45,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:45,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -959886517, now seen corresponding path program 2 times [2022-03-03 18:40:45,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:45,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470570050] [2022-03-03 18:40:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:45,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470570050] [2022-03-03 18:40:45,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470570050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:45,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:45,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:45,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376224219] [2022-03-03 18:40:45,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:45,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:45,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:45,544 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:45,616 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2022-03-03 18:40:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:45,617 INFO L225 Difference]: With dead ends: 80 [2022-03-03 18:40:45,617 INFO L226 Difference]: Without dead ends: 80 [2022-03-03 18:40:45,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:40:45,618 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:45,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-03 18:40:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2022-03-03 18:40:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2022-03-03 18:40:45,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2022-03-03 18:40:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:45,623 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2022-03-03 18:40:45,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2022-03-03 18:40:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:45,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:45,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:45,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 18:40:45,625 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash -388431711, now seen corresponding path program 3 times [2022-03-03 18:40:45,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:45,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389598689] [2022-03-03 18:40:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:45,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:45,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389598689] [2022-03-03 18:40:45,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389598689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:45,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:45,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:45,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200208496] [2022-03-03 18:40:45,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:45,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:45,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:45,659 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:45,741 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2022-03-03 18:40:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:40:45,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:45,742 INFO L225 Difference]: With dead ends: 77 [2022-03-03 18:40:45,742 INFO L226 Difference]: Without dead ends: 74 [2022-03-03 18:40:45,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:40:45,743 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:45,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 41 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-03 18:40:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2022-03-03 18:40:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-03-03 18:40:45,747 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2022-03-03 18:40:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:45,748 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-03-03 18:40:45,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-03-03 18:40:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:45,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:45,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:45,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 18:40:45,749 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1974964039, now seen corresponding path program 2 times [2022-03-03 18:40:45,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:45,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266438004] [2022-03-03 18:40:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:45,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266438004] [2022-03-03 18:40:45,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266438004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:45,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918297141] [2022-03-03 18:40:45,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:40:45,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:45,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:45,783 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) [2022-03-03 18:40:45,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 18:40:45,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 18:40:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:45,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918297141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:45,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:45,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 18:40:45,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769892647] [2022-03-03 18:40:45,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:45,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 18:40:45,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:45,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 18:40:45,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:40:45,921 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:45,981 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2022-03-03 18:40:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:45,982 INFO L225 Difference]: With dead ends: 67 [2022-03-03 18:40:45,982 INFO L226 Difference]: Without dead ends: 67 [2022-03-03 18:40:45,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:40:45,984 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:45,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-03 18:40:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2022-03-03 18:40:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2022-03-03 18:40:45,995 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2022-03-03 18:40:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:45,996 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2022-03-03 18:40:45,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2022-03-03 18:40:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:45,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:45,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:46,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-03 18:40:46,211 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,SelfDestructingSolverStorable6 [2022-03-03 18:40:46,212 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:46,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1510372935, now seen corresponding path program 3 times [2022-03-03 18:40:46,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:46,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065654616] [2022-03-03 18:40:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:46,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:46,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065654616] [2022-03-03 18:40:46,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065654616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:46,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:46,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:46,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855634520] [2022-03-03 18:40:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:46,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:46,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:46,250 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:46,301 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2022-03-03 18:40:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 18:40:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:46,302 INFO L225 Difference]: With dead ends: 60 [2022-03-03 18:40:46,302 INFO L226 Difference]: Without dead ends: 58 [2022-03-03 18:40:46,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:40:46,303 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:46,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:46,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-03 18:40:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-03-03 18:40:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2022-03-03 18:40:46,306 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2022-03-03 18:40:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:46,306 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2022-03-03 18:40:46,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2022-03-03 18:40:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:46,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:46,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:46,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-03 18:40:46,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1990959481, now seen corresponding path program 4 times [2022-03-03 18:40:46,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:46,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054400209] [2022-03-03 18:40:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:46,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054400209] [2022-03-03 18:40:46,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054400209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:46,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:46,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:46,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421912843] [2022-03-03 18:40:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:46,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:46,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:46,332 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:46,370 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2022-03-03 18:40:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:46,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:46,371 INFO L225 Difference]: With dead ends: 63 [2022-03-03 18:40:46,371 INFO L226 Difference]: Without dead ends: 63 [2022-03-03 18:40:46,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:40:46,372 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:46,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-03 18:40:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2022-03-03 18:40:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2022-03-03 18:40:46,374 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2022-03-03 18:40:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:46,375 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2022-03-03 18:40:46,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2022-03-03 18:40:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:46,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:46,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:46,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-03 18:40:46,376 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1228296659, now seen corresponding path program 5 times [2022-03-03 18:40:46,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:46,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793572694] [2022-03-03 18:40:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:46,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:46,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793572694] [2022-03-03 18:40:46,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793572694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:46,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:46,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:46,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658687249] [2022-03-03 18:40:46,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:46,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:46,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:46,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:46,400 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:46,441 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2022-03-03 18:40:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:46,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:46,442 INFO L225 Difference]: With dead ends: 65 [2022-03-03 18:40:46,442 INFO L226 Difference]: Without dead ends: 65 [2022-03-03 18:40:46,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:40:46,443 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:46,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-03 18:40:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2022-03-03 18:40:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2022-03-03 18:40:46,445 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2022-03-03 18:40:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:46,446 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2022-03-03 18:40:46,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2022-03-03 18:40:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:46,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:46,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:46,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-03 18:40:46,447 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1799751465, now seen corresponding path program 6 times [2022-03-03 18:40:46,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:46,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830319106] [2022-03-03 18:40:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:46,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830319106] [2022-03-03 18:40:46,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830319106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:46,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:46,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:46,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722113783] [2022-03-03 18:40:46,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:46,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:46,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:46,470 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:46,527 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2022-03-03 18:40:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 18:40:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:46,528 INFO L225 Difference]: With dead ends: 58 [2022-03-03 18:40:46,528 INFO L226 Difference]: Without dead ends: 55 [2022-03-03 18:40:46,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:40:46,529 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:46,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-03 18:40:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2022-03-03 18:40:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 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) [2022-03-03 18:40:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2022-03-03 18:40:46,535 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2022-03-03 18:40:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:46,535 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2022-03-03 18:40:46,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2022-03-03 18:40:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:46,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:46,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:46,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-03 18:40:46,536 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash -131820081, now seen corresponding path program 4 times [2022-03-03 18:40:46,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:46,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509582251] [2022-03-03 18:40:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:46,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509582251] [2022-03-03 18:40:46,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509582251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:46,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593796807] [2022-03-03 18:40:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:40:46,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:46,564 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) [2022-03-03 18:40:46,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 18:40:46,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:40:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:46,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 18:40:46,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593796807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:46,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:46,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 18:40:46,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274559811] [2022-03-03 18:40:46,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:46,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 18:40:46,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:46,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 18:40:46,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:40:46,698 INFO L87 Difference]: Start difference. First operand 39 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:46,738 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2022-03-03 18:40:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:40:46,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:46,740 INFO L225 Difference]: With dead ends: 60 [2022-03-03 18:40:46,740 INFO L226 Difference]: Without dead ends: 60 [2022-03-03 18:40:46,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:40:46,741 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:46,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-03 18:40:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2022-03-03 18:40:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2022-03-03 18:40:46,746 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2022-03-03 18:40:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:46,747 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2022-03-03 18:40:46,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2022-03-03 18:40:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:46,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:46,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:46,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-03 18:40:46,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:46,956 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash -596411185, now seen corresponding path program 5 times [2022-03-03 18:40:46,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:46,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061225134] [2022-03-03 18:40:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:46,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:46,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061225134] [2022-03-03 18:40:46,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061225134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:46,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:46,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:46,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454616400] [2022-03-03 18:40:46,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:46,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:46,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:46,985 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:47,046 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2022-03-03 18:40:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:40:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:47,047 INFO L225 Difference]: With dead ends: 74 [2022-03-03 18:40:47,047 INFO L226 Difference]: Without dead ends: 72 [2022-03-03 18:40:47,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:40:47,047 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:47,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-03 18:40:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2022-03-03 18:40:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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) [2022-03-03 18:40:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-03-03 18:40:47,050 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2022-03-03 18:40:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:47,050 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-03-03 18:40:47,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-03-03 18:40:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:40:47,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:47,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:47,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-03 18:40:47,051 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash -213690797, now seen corresponding path program 6 times [2022-03-03 18:40:47,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:47,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337239196] [2022-03-03 18:40:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:47,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:47,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337239196] [2022-03-03 18:40:47,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337239196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:40:47,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:40:47,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 18:40:47,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150619878] [2022-03-03 18:40:47,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:40:47,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:40:47,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:40:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:40:47,075 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:47,113 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2022-03-03 18:40:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 18:40:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:47,114 INFO L225 Difference]: With dead ends: 44 [2022-03-03 18:40:47,114 INFO L226 Difference]: Without dead ends: 40 [2022-03-03 18:40:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:40:47,115 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:47,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:40:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-03 18:40:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-03 18:40:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 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) [2022-03-03 18:40:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2022-03-03 18:40:47,117 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2022-03-03 18:40:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:47,117 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2022-03-03 18:40:47,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2022-03-03 18:40:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:40:47,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:47,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:47,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-03 18:40:47,118 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1291799271, now seen corresponding path program 1 times [2022-03-03 18:40:47,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:47,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049972062] [2022-03-03 18:40:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:47,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:47,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049972062] [2022-03-03 18:40:47,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049972062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:47,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810693518] [2022-03-03 18:40:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:47,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:47,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:47,216 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) [2022-03-03 18:40:47,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 18:40:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:47,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 18:40:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:47,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:47,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810693518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:47,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:47,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 18:40:47,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550118711] [2022-03-03 18:40:47,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:47,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:47,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:47,660 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:47,766 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2022-03-03 18:40:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:47,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:40:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:47,767 INFO L225 Difference]: With dead ends: 61 [2022-03-03 18:40:47,767 INFO L226 Difference]: Without dead ends: 54 [2022-03-03 18:40:47,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:47,770 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:47,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-03 18:40:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-03-03 18:40:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2022-03-03 18:40:47,777 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2022-03-03 18:40:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:47,777 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2022-03-03 18:40:47,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2022-03-03 18:40:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:40:47,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:47,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:47,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:47,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 18:40:47,991 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1163056683, now seen corresponding path program 2 times [2022-03-03 18:40:47,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:47,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672043294] [2022-03-03 18:40:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:47,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:48,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:48,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672043294] [2022-03-03 18:40:48,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672043294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:48,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589121552] [2022-03-03 18:40:48,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:40:48,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:48,071 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) [2022-03-03 18:40:48,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 18:40:48,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:48,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 18:40:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:48,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:48,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589121552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:48,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:48,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 18:40:48,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160535794] [2022-03-03 18:40:48,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:48,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:40:48,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:40:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:48,441 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:48,543 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2022-03-03 18:40:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:48,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:40:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:48,544 INFO L225 Difference]: With dead ends: 76 [2022-03-03 18:40:48,544 INFO L226 Difference]: Without dead ends: 69 [2022-03-03 18:40:48,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:40:48,544 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:48,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-03 18:40:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-03-03 18:40:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2022-03-03 18:40:48,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2022-03-03 18:40:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:48,547 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2022-03-03 18:40:48,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2022-03-03 18:40:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:40:48,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:48,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:48,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:48,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 18:40:48,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1517207889, now seen corresponding path program 3 times [2022-03-03 18:40:48,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:48,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961782997] [2022-03-03 18:40:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:48,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:48,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961782997] [2022-03-03 18:40:48,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961782997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:48,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489962281] [2022-03-03 18:40:48,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:40:48,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:48,822 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) [2022-03-03 18:40:48,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 18:40:48,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:40:48,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 18:40:48,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:49,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:49,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489962281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:49,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:49,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 18:40:49,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584441108] [2022-03-03 18:40:49,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:49,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:40:49,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:40:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:49,180 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:49,310 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2022-03-03 18:40:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:40:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:49,311 INFO L225 Difference]: With dead ends: 64 [2022-03-03 18:40:49,311 INFO L226 Difference]: Without dead ends: 57 [2022-03-03 18:40:49,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:40:49,311 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:49,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 58 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-03 18:40:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-03-03 18:40:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2022-03-03 18:40:49,313 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2022-03-03 18:40:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:49,314 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2022-03-03 18:40:49,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2022-03-03 18:40:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:40:49,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:49,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:49,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:49,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-03 18:40:49,525 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:49,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 110977511, now seen corresponding path program 4 times [2022-03-03 18:40:49,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:49,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030410566] [2022-03-03 18:40:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:49,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:49,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030410566] [2022-03-03 18:40:49,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030410566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:49,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579942559] [2022-03-03 18:40:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:40:49,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:49,605 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) [2022-03-03 18:40:49,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 18:40:49,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:40:49,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 18:40:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:49,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:49,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579942559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:49,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:49,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 18:40:49,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887117083] [2022-03-03 18:40:49,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:49,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:40:49,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:40:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:49,957 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:50,069 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2022-03-03 18:40:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:50,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:40:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:50,070 INFO L225 Difference]: With dead ends: 80 [2022-03-03 18:40:50,070 INFO L226 Difference]: Without dead ends: 73 [2022-03-03 18:40:50,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:40:50,071 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:50,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 82 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-03 18:40:50,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2022-03-03 18:40:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2022-03-03 18:40:50,074 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2022-03-03 18:40:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:50,074 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2022-03-03 18:40:50,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2022-03-03 18:40:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:40:50,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:50,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:50,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:50,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:50,292 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1725680235, now seen corresponding path program 5 times [2022-03-03 18:40:50,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:50,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933812196] [2022-03-03 18:40:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:50,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:50,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:50,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933812196] [2022-03-03 18:40:50,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933812196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:50,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693614490] [2022-03-03 18:40:50,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:40:50,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:50,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:50,361 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) [2022-03-03 18:40:50,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 18:40:50,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:50,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 18:40:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:50,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:50,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693614490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:50,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:50,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 18:40:50,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869628171] [2022-03-03 18:40:50,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:50,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:40:50,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:40:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:50,737 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:50,848 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2022-03-03 18:40:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:50,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:40:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:50,850 INFO L225 Difference]: With dead ends: 82 [2022-03-03 18:40:50,850 INFO L226 Difference]: Without dead ends: 75 [2022-03-03 18:40:50,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:40:50,851 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:50,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 83 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-03 18:40:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2022-03-03 18:40:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2022-03-03 18:40:50,853 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2022-03-03 18:40:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:50,853 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2022-03-03 18:40:50,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2022-03-03 18:40:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:40:50,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:50,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:50,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:51,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:51,071 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash -353613593, now seen corresponding path program 6 times [2022-03-03 18:40:51,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:51,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968133281] [2022-03-03 18:40:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:51,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:51,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968133281] [2022-03-03 18:40:51,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968133281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:51,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473873069] [2022-03-03 18:40:51,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:40:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:51,148 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) [2022-03-03 18:40:51,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 18:40:51,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 18:40:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 18:40:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:51,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:51,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473873069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:51,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:51,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 18:40:51,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303346538] [2022-03-03 18:40:51,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:51,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:51,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:51,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:51,470 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:51,556 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2022-03-03 18:40:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:51,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:40:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:51,558 INFO L225 Difference]: With dead ends: 67 [2022-03-03 18:40:51,558 INFO L226 Difference]: Without dead ends: 60 [2022-03-03 18:40:51,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:51,559 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:51,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 74 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-03 18:40:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-03-03 18:40:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2022-03-03 18:40:51,561 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2022-03-03 18:40:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:51,561 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2022-03-03 18:40:51,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2022-03-03 18:40:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:51,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:51,562 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:51,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:51,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:51,773 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1417691671, now seen corresponding path program 7 times [2022-03-03 18:40:51,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:51,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95203350] [2022-03-03 18:40:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:51,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:51,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95203350] [2022-03-03 18:40:51,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95203350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:51,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244162850] [2022-03-03 18:40:51,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:40:51,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:51,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:51,813 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) [2022-03-03 18:40:51,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 18:40:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:51,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244162850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:51,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:51,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-03 18:40:51,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736352579] [2022-03-03 18:40:51,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:51,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 18:40:51,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:51,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 18:40:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:40:51,924 INFO L87 Difference]: Start difference. First operand 58 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:52,013 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2022-03-03 18:40:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:40:52,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:52,014 INFO L225 Difference]: With dead ends: 84 [2022-03-03 18:40:52,014 INFO L226 Difference]: Without dead ends: 73 [2022-03-03 18:40:52,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:40:52,015 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:52,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 75 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-03 18:40:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-03-03 18:40:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2022-03-03 18:40:52,017 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2022-03-03 18:40:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:52,017 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2022-03-03 18:40:52,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2022-03-03 18:40:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:52,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:52,018 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:52,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:52,243 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,SelfDestructingSolverStorable20 [2022-03-03 18:40:52,244 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1616438265, now seen corresponding path program 8 times [2022-03-03 18:40:52,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:52,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691482013] [2022-03-03 18:40:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:52,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:52,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:52,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691482013] [2022-03-03 18:40:52,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691482013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:52,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205501193] [2022-03-03 18:40:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:40:52,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:52,287 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) [2022-03-03 18:40:52,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 18:40:52,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:52,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:52,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205501193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:52,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:52,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-03 18:40:52,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042026178] [2022-03-03 18:40:52,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:52,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 18:40:52,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 18:40:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:40:52,405 INFO L87 Difference]: Start difference. First operand 53 states and 103 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:52,475 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2022-03-03 18:40:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:52,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:52,476 INFO L225 Difference]: With dead ends: 81 [2022-03-03 18:40:52,476 INFO L226 Difference]: Without dead ends: 81 [2022-03-03 18:40:52,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:52,477 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:52,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-03 18:40:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-03-03 18:40:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2022-03-03 18:40:52,480 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2022-03-03 18:40:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:52,480 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2022-03-03 18:40:52,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2022-03-03 18:40:52,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:52,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:52,481 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:52,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:52,695 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,SelfDestructingSolverStorable21 [2022-03-03 18:40:52,696 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:52,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1437143285, now seen corresponding path program 9 times [2022-03-03 18:40:52,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:52,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963379563] [2022-03-03 18:40:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:52,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:52,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:52,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963379563] [2022-03-03 18:40:52,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963379563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:52,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034017142] [2022-03-03 18:40:52,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:40:52,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:52,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:52,734 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) [2022-03-03 18:40:52,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 18:40:52,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:40:52,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:52,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:52,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:52,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034017142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:52,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:52,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:52,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863450876] [2022-03-03 18:40:52,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:52,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:52,870 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:53,013 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2022-03-03 18:40:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:40:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:53,015 INFO L225 Difference]: With dead ends: 154 [2022-03-03 18:40:53,015 INFO L226 Difference]: Without dead ends: 154 [2022-03-03 18:40:53,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:40:53,016 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:53,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 111 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-03 18:40:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2022-03-03 18:40:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2022-03-03 18:40:53,019 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2022-03-03 18:40:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:53,019 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2022-03-03 18:40:53,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2022-03-03 18:40:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:53,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:53,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:53,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:53,220 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,SelfDestructingSolverStorable22 [2022-03-03 18:40:53,220 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash -865688479, now seen corresponding path program 10 times [2022-03-03 18:40:53,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:53,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191509571] [2022-03-03 18:40:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:53,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:53,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191509571] [2022-03-03 18:40:53,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191509571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:53,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874709044] [2022-03-03 18:40:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:40:53,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:53,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:53,252 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) [2022-03-03 18:40:53,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 18:40:53,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:40:53,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:53,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:53,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:53,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:53,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874709044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:53,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:53,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:53,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43489900] [2022-03-03 18:40:53,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:53,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:53,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:53,359 INFO L87 Difference]: Start difference. First operand 62 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:53,526 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2022-03-03 18:40:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:40:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:53,528 INFO L225 Difference]: With dead ends: 157 [2022-03-03 18:40:53,528 INFO L226 Difference]: Without dead ends: 154 [2022-03-03 18:40:53,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:40:53,529 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:53,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 81 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:53,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-03 18:40:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2022-03-03 18:40:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2022-03-03 18:40:53,532 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2022-03-03 18:40:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:53,532 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2022-03-03 18:40:53,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2022-03-03 18:40:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:53,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:53,532 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:53,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:53,743 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,SelfDestructingSolverStorable23 [2022-03-03 18:40:53,743 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1497707271, now seen corresponding path program 11 times [2022-03-03 18:40:53,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:53,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597946376] [2022-03-03 18:40:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:53,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:53,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:53,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597946376] [2022-03-03 18:40:53,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597946376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:53,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44763619] [2022-03-03 18:40:53,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:40:53,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:53,779 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) [2022-03-03 18:40:53,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 18:40:53,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:53,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:53,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:53,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44763619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:53,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:53,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:53,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117815864] [2022-03-03 18:40:53,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:53,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:53,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:53,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:53,894 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:54,015 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2022-03-03 18:40:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:40:54,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:54,017 INFO L225 Difference]: With dead ends: 160 [2022-03-03 18:40:54,017 INFO L226 Difference]: Without dead ends: 160 [2022-03-03 18:40:54,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:40:54,018 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:54,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 67 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-03 18:40:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2022-03-03 18:40:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.217391304347826) internal successors, (153), 69 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2022-03-03 18:40:54,030 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2022-03-03 18:40:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:54,030 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2022-03-03 18:40:54,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2022-03-03 18:40:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:54,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:54,031 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:54,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-03 18:40:54,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:54,244 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1033116167, now seen corresponding path program 12 times [2022-03-03 18:40:54,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:54,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139764953] [2022-03-03 18:40:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:54,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:54,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139764953] [2022-03-03 18:40:54,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139764953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:54,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957294938] [2022-03-03 18:40:54,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:40:54,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:54,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:54,275 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) [2022-03-03 18:40:54,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 18:40:54,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:40:54,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:54,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:54,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:54,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957294938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:54,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:54,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:54,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985428111] [2022-03-03 18:40:54,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:54,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:54,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:54,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:54,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:54,395 INFO L87 Difference]: Start difference. First operand 70 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:40:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:54,550 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2022-03-03 18:40:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:40:54,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:54,551 INFO L225 Difference]: With dead ends: 114 [2022-03-03 18:40:54,551 INFO L226 Difference]: Without dead ends: 110 [2022-03-03 18:40:54,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:40:54,552 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:54,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 55 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-03 18:40:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2022-03-03 18:40:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2022-03-03 18:40:54,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2022-03-03 18:40:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:54,555 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2022-03-03 18:40:54,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:40:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2022-03-03 18:40:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:54,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:54,557 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:54,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:54,767 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,SelfDestructingSolverStorable25 [2022-03-03 18:40:54,768 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash -330458677, now seen corresponding path program 13 times [2022-03-03 18:40:54,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:54,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801490001] [2022-03-03 18:40:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:54,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:54,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:54,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801490001] [2022-03-03 18:40:54,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801490001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:54,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066076921] [2022-03-03 18:40:54,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:40:54,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:54,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:54,802 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) [2022-03-03 18:40:54,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 18:40:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:54,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:54,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066076921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:54,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:54,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:54,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112519045] [2022-03-03 18:40:54,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:54,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:54,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:54,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:54,944 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:55,106 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2022-03-03 18:40:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:40:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:55,108 INFO L225 Difference]: With dead ends: 132 [2022-03-03 18:40:55,119 INFO L226 Difference]: Without dead ends: 126 [2022-03-03 18:40:55,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:40:55,119 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:55,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 77 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-03 18:40:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2022-03-03 18:40:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2022-03-03 18:40:55,123 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2022-03-03 18:40:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:55,123 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2022-03-03 18:40:55,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2022-03-03 18:40:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:55,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:55,126 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:55,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:55,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 18:40:55,334 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1051975989, now seen corresponding path program 14 times [2022-03-03 18:40:55,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:55,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374623195] [2022-03-03 18:40:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:55,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:55,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374623195] [2022-03-03 18:40:55,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374623195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:55,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682513016] [2022-03-03 18:40:55,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:40:55,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:55,364 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) [2022-03-03 18:40:55,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 18:40:55,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:55,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:55,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682513016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:55,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:55,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-03 18:40:55,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354214694] [2022-03-03 18:40:55,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:55,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:55,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:55,514 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:55,647 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2022-03-03 18:40:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:40:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:40:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:55,649 INFO L225 Difference]: With dead ends: 186 [2022-03-03 18:40:55,649 INFO L226 Difference]: Without dead ends: 186 [2022-03-03 18:40:55,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:40:55,649 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:55,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 88 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-03 18:40:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2022-03-03 18:40:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2022-03-03 18:40:55,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2022-03-03 18:40:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:55,653 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2022-03-03 18:40:55,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2022-03-03 18:40:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:55,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:55,654 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:55,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:55,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 18:40:55,863 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1516567093, now seen corresponding path program 15 times [2022-03-03 18:40:55,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:55,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823883630] [2022-03-03 18:40:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:40:55,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:55,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823883630] [2022-03-03 18:40:55,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823883630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:55,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107042222] [2022-03-03 18:40:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:40:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:55,896 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) [2022-03-03 18:40:55,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 18:40:55,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 18:40:55,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:55,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:55,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:40:56,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107042222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:56,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:56,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-03 18:40:56,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824151550] [2022-03-03 18:40:56,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:56,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:56,023 INFO L87 Difference]: Start difference. First operand 84 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:56,188 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2022-03-03 18:40:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:40:56,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:56,189 INFO L225 Difference]: With dead ends: 157 [2022-03-03 18:40:56,189 INFO L226 Difference]: Without dead ends: 155 [2022-03-03 18:40:56,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:40:56,190 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:56,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 63 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-03 18:40:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2022-03-03 18:40:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2022-03-03 18:40:56,193 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2022-03-03 18:40:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:56,194 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2022-03-03 18:40:56,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:56,194 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2022-03-03 18:40:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:56,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:56,194 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:56,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:56,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 18:40:56,407 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1550166321, now seen corresponding path program 16 times [2022-03-03 18:40:56,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:56,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171513638] [2022-03-03 18:40:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:56,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:56,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:56,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171513638] [2022-03-03 18:40:56,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171513638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:56,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957323493] [2022-03-03 18:40:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:40:56,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:56,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:56,443 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) [2022-03-03 18:40:56,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 18:40:56,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:40:56,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:56,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:56,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:56,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957323493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:56,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:56,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-03 18:40:56,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382517565] [2022-03-03 18:40:56,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:56,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 18:40:56,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 18:40:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-03 18:40:56,569 INFO L87 Difference]: Start difference. First operand 84 states and 191 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:56,755 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2022-03-03 18:40:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:40:56,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:56,756 INFO L225 Difference]: With dead ends: 146 [2022-03-03 18:40:56,756 INFO L226 Difference]: Without dead ends: 142 [2022-03-03 18:40:56,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:40:56,757 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:56,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 85 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-03 18:40:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2022-03-03 18:40:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2022-03-03 18:40:56,761 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2022-03-03 18:40:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:56,762 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2022-03-03 18:40:56,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2022-03-03 18:40:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:56,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:56,762 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:56,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:56,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:56,975 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1574395569, now seen corresponding path program 17 times [2022-03-03 18:40:56,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:56,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057190095] [2022-03-03 18:40:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:56,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:57,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057190095] [2022-03-03 18:40:57,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057190095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:57,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678119331] [2022-03-03 18:40:57,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:40:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:57,007 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) [2022-03-03 18:40:57,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 18:40:57,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:40:57,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:57,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678119331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:57,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:57,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-03 18:40:57,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352102893] [2022-03-03 18:40:57,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:57,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 18:40:57,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 18:40:57,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:40:57,114 INFO L87 Difference]: Start difference. First operand 94 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:57,188 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2022-03-03 18:40:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:40:57,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:57,190 INFO L225 Difference]: With dead ends: 128 [2022-03-03 18:40:57,190 INFO L226 Difference]: Without dead ends: 128 [2022-03-03 18:40:57,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:40:57,193 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:57,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-03 18:40:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2022-03-03 18:40:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.391304347826087) internal successors, (220), 92 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2022-03-03 18:40:57,202 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2022-03-03 18:40:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:57,203 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2022-03-03 18:40:57,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2022-03-03 18:40:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:57,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:57,204 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:57,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:57,427 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,SelfDestructingSolverStorable30 [2022-03-03 18:40:57,427 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash -561703037, now seen corresponding path program 18 times [2022-03-03 18:40:57,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:57,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711240996] [2022-03-03 18:40:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:57,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711240996] [2022-03-03 18:40:57,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711240996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:57,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315626892] [2022-03-03 18:40:57,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:40:57,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:57,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:57,456 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) [2022-03-03 18:40:57,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 18:40:57,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:40:57,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315626892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:57,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:57,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:57,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226680800] [2022-03-03 18:40:57,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:57,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:57,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:57,568 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:57,671 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2022-03-03 18:40:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:40:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:57,672 INFO L225 Difference]: With dead ends: 128 [2022-03-03 18:40:57,672 INFO L226 Difference]: Without dead ends: 128 [2022-03-03 18:40:57,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:40:57,672 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:57,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-03 18:40:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2022-03-03 18:40:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.422680412371134) internal successors, (235), 97 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2022-03-03 18:40:57,676 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2022-03-03 18:40:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:57,676 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2022-03-03 18:40:57,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2022-03-03 18:40:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:57,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:57,677 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:57,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:57,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:57,883 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:57,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1584467723, now seen corresponding path program 19 times [2022-03-03 18:40:57,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:57,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554413853] [2022-03-03 18:40:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:57,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:57,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554413853] [2022-03-03 18:40:57,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554413853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:57,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203505890] [2022-03-03 18:40:57,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:40:57,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:57,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:57,915 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) [2022-03-03 18:40:57,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 18:40:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:57,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:57,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:58,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203505890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:58,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:58,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:58,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642038963] [2022-03-03 18:40:58,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:58,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:58,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:58,027 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:58,149 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2022-03-03 18:40:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:40:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:58,152 INFO L225 Difference]: With dead ends: 175 [2022-03-03 18:40:58,152 INFO L226 Difference]: Without dead ends: 175 [2022-03-03 18:40:58,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:40:58,153 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:58,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 76 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-03 18:40:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2022-03-03 18:40:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.46) internal successors, (246), 100 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2022-03-03 18:40:58,157 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2022-03-03 18:40:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:58,157 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2022-03-03 18:40:58,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2022-03-03 18:40:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:58,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:58,158 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:58,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:58,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:58,381 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2139044767, now seen corresponding path program 20 times [2022-03-03 18:40:58,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:58,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686320640] [2022-03-03 18:40:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:58,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:58,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:58,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686320640] [2022-03-03 18:40:58,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686320640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:58,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136110691] [2022-03-03 18:40:58,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:40:58,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:58,414 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) [2022-03-03 18:40:58,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 18:40:58,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:58,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:58,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:58,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:58,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:58,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136110691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:58,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:58,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:58,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278589005] [2022-03-03 18:40:58,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:58,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:58,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:58,536 INFO L87 Difference]: Start difference. First operand 101 states and 246 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:58,673 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2022-03-03 18:40:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:40:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:58,674 INFO L225 Difference]: With dead ends: 143 [2022-03-03 18:40:58,674 INFO L226 Difference]: Without dead ends: 137 [2022-03-03 18:40:58,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:40:58,675 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:58,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 62 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-03 18:40:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2022-03-03 18:40:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4329896907216493) internal successors, (236), 97 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2022-03-03 18:40:58,678 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2022-03-03 18:40:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:58,678 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2022-03-03 18:40:58,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2022-03-03 18:40:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:58,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:58,679 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:58,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:58,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:58,895 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 224350983, now seen corresponding path program 21 times [2022-03-03 18:40:58,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:58,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519837892] [2022-03-03 18:40:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:58,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:58,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519837892] [2022-03-03 18:40:58,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519837892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:58,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272540709] [2022-03-03 18:40:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:40:58,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:58,926 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) [2022-03-03 18:40:58,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 18:40:58,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:40:58,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:58,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:59,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:59,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272540709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:59,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:59,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:59,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061057565] [2022-03-03 18:40:59,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:59,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:59,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:59,038 INFO L87 Difference]: Start difference. First operand 98 states and 236 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:59,159 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2022-03-03 18:40:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:40:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:59,160 INFO L225 Difference]: With dead ends: 189 [2022-03-03 18:40:59,160 INFO L226 Difference]: Without dead ends: 189 [2022-03-03 18:40:59,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:40:59,161 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:59,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 81 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-03 18:40:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2022-03-03 18:40:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 105 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2022-03-03 18:40:59,166 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2022-03-03 18:40:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:59,166 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2022-03-03 18:40:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2022-03-03 18:40:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:59,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:59,166 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:59,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 18:40:59,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:59,379 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:59,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash -240240121, now seen corresponding path program 22 times [2022-03-03 18:40:59,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:59,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445968469] [2022-03-03 18:40:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:59,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:59,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:59,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445968469] [2022-03-03 18:40:59,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445968469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:59,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138383791] [2022-03-03 18:40:59,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:40:59,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:59,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:59,409 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) [2022-03-03 18:40:59,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 18:40:59,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:40:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:40:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:59,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:40:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:59,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138383791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:40:59,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:40:59,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:40:59,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125573339] [2022-03-03 18:40:59,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:40:59,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:40:59,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:40:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:40:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:40:59,516 INFO L87 Difference]: Start difference. First operand 106 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:40:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:40:59,685 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2022-03-03 18:40:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:40:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:40:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:40:59,686 INFO L225 Difference]: With dead ends: 179 [2022-03-03 18:40:59,686 INFO L226 Difference]: Without dead ends: 177 [2022-03-03 18:40:59,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:40:59,687 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:40:59,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 77 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:40:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-03 18:40:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2022-03-03 18:40:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.44) internal successors, (244), 100 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:40:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2022-03-03 18:40:59,691 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2022-03-03 18:40:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:40:59,692 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2022-03-03 18:40:59,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:40:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2022-03-03 18:40:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:40:59,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:40:59,692 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:40:59,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-03 18:40:59,907 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,SelfDestructingSolverStorable35 [2022-03-03 18:40:59,907 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:40:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:40:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash -273839349, now seen corresponding path program 23 times [2022-03-03 18:40:59,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:40:59,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627191402] [2022-03-03 18:40:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:40:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:40:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:40:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:40:59,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:40:59,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627191402] [2022-03-03 18:40:59,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627191402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:40:59,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118682006] [2022-03-03 18:40:59,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:40:59,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:40:59,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:40:59,942 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) [2022-03-03 18:40:59,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 18:40:59,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:40:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:40:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:40:59,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118682006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:00,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:00,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 18:41:00,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233411395] [2022-03-03 18:41:00,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:00,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:41:00,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:00,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:41:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:41:00,068 INFO L87 Difference]: Start difference. First operand 101 states and 244 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:41:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:00,187 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2022-03-03 18:41:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:41:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:41:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:00,188 INFO L225 Difference]: With dead ends: 150 [2022-03-03 18:41:00,188 INFO L226 Difference]: Without dead ends: 146 [2022-03-03 18:41:00,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:00,189 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:00,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 69 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-03 18:41:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2022-03-03 18:41:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.42) internal successors, (242), 100 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2022-03-03 18:41:00,192 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2022-03-03 18:41:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:00,192 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2022-03-03 18:41:00,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:41:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2022-03-03 18:41:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:41:00,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:00,193 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:00,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-03 18:41:00,411 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,SelfDestructingSolverStorable36 [2022-03-03 18:41:00,411 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1294409209, now seen corresponding path program 24 times [2022-03-03 18:41:00,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:00,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298337710] [2022-03-03 18:41:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:00,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:00,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298337710] [2022-03-03 18:41:00,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298337710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:00,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122209102] [2022-03-03 18:41:00,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:00,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:00,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:00,443 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) [2022-03-03 18:41:00,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 18:41:00,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 18:41:00,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:00,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:41:00,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122209102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:00,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:00,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-03 18:41:00,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519128062] [2022-03-03 18:41:00,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:00,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 18:41:00,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 18:41:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:41:00,550 INFO L87 Difference]: Start difference. First operand 101 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:00,611 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2022-03-03 18:41:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:41:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:41:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:00,612 INFO L225 Difference]: With dead ends: 114 [2022-03-03 18:41:00,612 INFO L226 Difference]: Without dead ends: 108 [2022-03-03 18:41:00,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:00,613 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:00,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 56 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:41:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-03 18:41:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2022-03-03 18:41:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2022-03-03 18:41:00,616 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2022-03-03 18:41:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:00,616 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2022-03-03 18:41:00,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2022-03-03 18:41:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:41:00,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:00,617 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:00,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:00,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 18:41:00,819 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:00,820 INFO L85 PathProgramCache]: Analyzing trace with hash 766994383, now seen corresponding path program 25 times [2022-03-03 18:41:00,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:00,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672542385] [2022-03-03 18:41:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:00,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:00,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672542385] [2022-03-03 18:41:00,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672542385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:00,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20325654] [2022-03-03 18:41:00,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:00,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:00,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:00,864 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) [2022-03-03 18:41:00,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 18:41:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:41:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:00,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20325654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:00,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:00,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-03 18:41:00,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56405072] [2022-03-03 18:41:00,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:00,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 18:41:00,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:00,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 18:41:00,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-03 18:41:00,994 INFO L87 Difference]: Start difference. First operand 101 states and 241 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-03 18:41:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:01,148 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2022-03-03 18:41:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:41:01,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:41:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:01,149 INFO L225 Difference]: With dead ends: 167 [2022-03-03 18:41:01,149 INFO L226 Difference]: Without dead ends: 167 [2022-03-03 18:41:01,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:01,150 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:01,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 87 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-03 18:41:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2022-03-03 18:41:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.436893203883495) internal successors, (251), 103 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2022-03-03 18:41:01,154 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2022-03-03 18:41:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:01,154 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2022-03-03 18:41:01,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-03 18:41:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2022-03-03 18:41:01,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:41:01,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:01,155 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:01,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-03 18:41:01,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 18:41:01,375 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash 724981967, now seen corresponding path program 26 times [2022-03-03 18:41:01,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:01,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757145241] [2022-03-03 18:41:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:01,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:01,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757145241] [2022-03-03 18:41:01,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757145241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:01,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442922514] [2022-03-03 18:41:01,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:01,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:01,401 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) [2022-03-03 18:41:01,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 18:41:01,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:01,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:41:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:01,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:01,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442922514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:01,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:01,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-03 18:41:01,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826360730] [2022-03-03 18:41:01,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:01,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:41:01,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:41:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:41:01,528 INFO L87 Difference]: Start difference. First operand 104 states and 251 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:41:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:01,638 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2022-03-03 18:41:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:41:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:41:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:01,639 INFO L225 Difference]: With dead ends: 217 [2022-03-03 18:41:01,639 INFO L226 Difference]: Without dead ends: 217 [2022-03-03 18:41:01,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:41:01,640 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:01,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 74 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-03 18:41:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2022-03-03 18:41:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.526315789473684) internal successors, (288), 114 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2022-03-03 18:41:01,645 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2022-03-03 18:41:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:01,645 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2022-03-03 18:41:01,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:41:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2022-03-03 18:41:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:41:01,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:01,645 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:01,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:01,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 18:41:01,852 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1296436773, now seen corresponding path program 27 times [2022-03-03 18:41:01,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:01,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419487903] [2022-03-03 18:41:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:01,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:01,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:01,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419487903] [2022-03-03 18:41:01,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419487903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:01,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435836050] [2022-03-03 18:41:01,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:01,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:01,881 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) [2022-03-03 18:41:01,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 18:41:01,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 18:41:01,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:41:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:01,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:01,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435836050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:01,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:01,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-03 18:41:01,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530673318] [2022-03-03 18:41:01,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:01,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:41:01,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:41:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:41:01,985 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:41:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:02,146 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2022-03-03 18:41:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:41:02,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:41:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:02,148 INFO L225 Difference]: With dead ends: 201 [2022-03-03 18:41:02,148 INFO L226 Difference]: Without dead ends: 198 [2022-03-03 18:41:02,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:02,148 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:02,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 65 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-03 18:41:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2022-03-03 18:41:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2022-03-03 18:41:02,152 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2022-03-03 18:41:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:02,152 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2022-03-03 18:41:02,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-03 18:41:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2022-03-03 18:41:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:41:02,153 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:02,153 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:02,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:02,376 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,SelfDestructingSolverStorable40 [2022-03-03 18:41:02,376 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1831666575, now seen corresponding path program 28 times [2022-03-03 18:41:02,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:02,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933876217] [2022-03-03 18:41:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:02,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:02,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933876217] [2022-03-03 18:41:02,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933876217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:02,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874826582] [2022-03-03 18:41:02,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:02,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:02,404 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) [2022-03-03 18:41:02,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 18:41:02,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:02,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:41:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:02,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:02,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874826582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:02,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:02,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-03 18:41:02,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462537199] [2022-03-03 18:41:02,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:02,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 18:41:02,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 18:41:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-03 18:41:02,505 INFO L87 Difference]: Start difference. First operand 109 states and 265 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-03 18:41:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:02,667 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2022-03-03 18:41:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:41:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 18:41:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:02,668 INFO L225 Difference]: With dead ends: 183 [2022-03-03 18:41:02,668 INFO L226 Difference]: Without dead ends: 177 [2022-03-03 18:41:02,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:41:02,669 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:02,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 70 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-03 18:41:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2022-03-03 18:41:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4958677685950414) internal successors, (302), 121 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2022-03-03 18:41:02,673 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2022-03-03 18:41:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:02,673 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2022-03-03 18:41:02,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-03 18:41:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2022-03-03 18:41:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:02,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:02,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:02,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:02,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:02,875 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1456641271, now seen corresponding path program 29 times [2022-03-03 18:41:02,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:02,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292675133] [2022-03-03 18:41:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:03,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:03,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292675133] [2022-03-03 18:41:03,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292675133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:03,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712543480] [2022-03-03 18:41:03,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:03,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:03,003 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) [2022-03-03 18:41:03,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 18:41:03,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:03,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:03,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:03,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712543480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:03,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:03,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 18:41:03,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626616185] [2022-03-03 18:41:03,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:03,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:03,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:03,400 INFO L87 Difference]: Start difference. First operand 122 states and 302 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:03,622 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2022-03-03 18:41:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:41:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:03,624 INFO L225 Difference]: With dead ends: 223 [2022-03-03 18:41:03,624 INFO L226 Difference]: Without dead ends: 203 [2022-03-03 18:41:03,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:03,625 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 83 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:03,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 201 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-03 18:41:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2022-03-03 18:41:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.475177304964539) internal successors, (349), 141 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2022-03-03 18:41:03,630 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2022-03-03 18:41:03,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:03,630 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2022-03-03 18:41:03,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2022-03-03 18:41:03,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:03,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:03,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:03,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:03,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:03,854 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:03,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1398193685, now seen corresponding path program 30 times [2022-03-03 18:41:03,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:03,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121756756] [2022-03-03 18:41:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:03,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:03,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:03,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121756756] [2022-03-03 18:41:03,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121756756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:03,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378935768] [2022-03-03 18:41:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:03,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:03,964 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) [2022-03-03 18:41:03,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 18:41:03,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:03,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:04,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:04,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378935768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:04,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:04,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 18:41:04,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190625099] [2022-03-03 18:41:04,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:04,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:04,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:04,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:04,378 INFO L87 Difference]: Start difference. First operand 142 states and 349 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:04,599 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2022-03-03 18:41:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:41:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:04,601 INFO L225 Difference]: With dead ends: 253 [2022-03-03 18:41:04,601 INFO L226 Difference]: Without dead ends: 246 [2022-03-03 18:41:04,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:04,601 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:04,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 245 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-03 18:41:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2022-03-03 18:41:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.527027027027027) internal successors, (374), 148 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2022-03-03 18:41:04,607 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2022-03-03 18:41:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:04,607 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2022-03-03 18:41:04,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2022-03-03 18:41:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:04,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:04,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:04,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:04,819 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,SelfDestructingSolverStorable43 [2022-03-03 18:41:04,820 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash 216509039, now seen corresponding path program 31 times [2022-03-03 18:41:04,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:04,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949955690] [2022-03-03 18:41:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:04,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:04,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949955690] [2022-03-03 18:41:04,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949955690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:04,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506570348] [2022-03-03 18:41:04,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:04,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:04,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:04,920 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) [2022-03-03 18:41:04,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 18:41:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:05,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:05,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506570348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:05,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:05,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 18:41:05,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029339838] [2022-03-03 18:41:05,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:05,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:05,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:05,307 INFO L87 Difference]: Start difference. First operand 149 states and 374 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:05,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:05,522 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2022-03-03 18:41:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:41:05,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:05,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:05,524 INFO L225 Difference]: With dead ends: 239 [2022-03-03 18:41:05,524 INFO L226 Difference]: Without dead ends: 223 [2022-03-03 18:41:05,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:05,524 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:05,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 212 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:05,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-03 18:41:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2022-03-03 18:41:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2022-03-03 18:41:05,529 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2022-03-03 18:41:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:05,530 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2022-03-03 18:41:05,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2022-03-03 18:41:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:05,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:05,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:05,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:05,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:05,743 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -826738879, now seen corresponding path program 32 times [2022-03-03 18:41:05,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:05,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555410912] [2022-03-03 18:41:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:05,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:05,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555410912] [2022-03-03 18:41:05,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555410912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:05,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781619553] [2022-03-03 18:41:05,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:05,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:05,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:05,833 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) [2022-03-03 18:41:05,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 18:41:05,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:05,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:06,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:06,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781619553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:06,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:06,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-03 18:41:06,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510001345] [2022-03-03 18:41:06,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:06,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:41:06,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:41:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:41:06,181 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:06,405 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2022-03-03 18:41:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:41:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:06,407 INFO L225 Difference]: With dead ends: 224 [2022-03-03 18:41:06,407 INFO L226 Difference]: Without dead ends: 217 [2022-03-03 18:41:06,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:06,407 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:06,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 221 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-03 18:41:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2022-03-03 18:41:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2022-03-03 18:41:06,412 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2022-03-03 18:41:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:06,412 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2022-03-03 18:41:06,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2022-03-03 18:41:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:06,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:06,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:06,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:06,627 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,SelfDestructingSolverStorable45 [2022-03-03 18:41:06,627 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:06,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:06,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1799080409, now seen corresponding path program 33 times [2022-03-03 18:41:06,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:06,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039496858] [2022-03-03 18:41:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:06,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:06,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039496858] [2022-03-03 18:41:06,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039496858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:06,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739182231] [2022-03-03 18:41:06,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:06,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:06,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:06,726 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) [2022-03-03 18:41:06,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 18:41:06,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:41:06,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:06,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:06,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:07,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739182231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:07,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:07,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 18:41:07,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767066012] [2022-03-03 18:41:07,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:07,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:07,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:07,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:07,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:07,131 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:07,267 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2022-03-03 18:41:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:41:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:07,268 INFO L225 Difference]: With dead ends: 218 [2022-03-03 18:41:07,268 INFO L226 Difference]: Without dead ends: 211 [2022-03-03 18:41:07,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:07,269 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:07,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 151 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-03 18:41:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2022-03-03 18:41:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.551282051282051) internal successors, (398), 156 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2022-03-03 18:41:07,274 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2022-03-03 18:41:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:07,274 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2022-03-03 18:41:07,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2022-03-03 18:41:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:07,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:07,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:07,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 18:41:07,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:07,491 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:07,492 INFO L85 PathProgramCache]: Analyzing trace with hash -184377685, now seen corresponding path program 34 times [2022-03-03 18:41:07,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:07,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989513788] [2022-03-03 18:41:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:07,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:07,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:07,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989513788] [2022-03-03 18:41:07,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989513788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:07,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717466046] [2022-03-03 18:41:07,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:07,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:07,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:07,584 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) [2022-03-03 18:41:07,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 18:41:07,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:07,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:07,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:07,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:07,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:07,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717466046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:07,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:07,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 18:41:07,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228743260] [2022-03-03 18:41:07,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:07,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:07,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:07,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:07,951 INFO L87 Difference]: Start difference. First operand 157 states and 398 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:08,094 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2022-03-03 18:41:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:08,095 INFO L225 Difference]: With dead ends: 220 [2022-03-03 18:41:08,095 INFO L226 Difference]: Without dead ends: 211 [2022-03-03 18:41:08,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:08,096 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:08,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 190 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-03 18:41:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2022-03-03 18:41:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2022-03-03 18:41:08,101 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2022-03-03 18:41:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:08,101 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2022-03-03 18:41:08,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2022-03-03 18:41:08,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:08,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:08,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:08,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:08,325 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,SelfDestructingSolverStorable47 [2022-03-03 18:41:08,326 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2031295783, now seen corresponding path program 35 times [2022-03-03 18:41:08,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:08,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031603283] [2022-03-03 18:41:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:08,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:08,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:08,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031603283] [2022-03-03 18:41:08,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031603283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:08,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225836059] [2022-03-03 18:41:08,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:08,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:08,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:08,422 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) [2022-03-03 18:41:08,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 18:41:08,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:08,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:08,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:08,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225836059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:08,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:08,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-03 18:41:08,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828915931] [2022-03-03 18:41:08,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:08,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:41:08,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:41:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:41:08,772 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:08,952 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2022-03-03 18:41:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:08,953 INFO L225 Difference]: With dead ends: 203 [2022-03-03 18:41:08,953 INFO L226 Difference]: Without dead ends: 196 [2022-03-03 18:41:08,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:41:08,954 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:08,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 171 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-03 18:41:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2022-03-03 18:41:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2022-03-03 18:41:08,958 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2022-03-03 18:41:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:08,958 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2022-03-03 18:41:08,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2022-03-03 18:41:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:08,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:08,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:08,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:09,159 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,SelfDestructingSolverStorable48 [2022-03-03 18:41:09,160 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1341666965, now seen corresponding path program 36 times [2022-03-03 18:41:09,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:09,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691611920] [2022-03-03 18:41:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:09,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:09,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691611920] [2022-03-03 18:41:09,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691611920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:09,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485374425] [2022-03-03 18:41:09,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:09,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:09,274 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) [2022-03-03 18:41:09,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 18:41:09,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:09,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:09,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:09,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:09,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:09,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485374425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:09,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:09,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 18:41:09,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974665168] [2022-03-03 18:41:09,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:09,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:09,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:09,678 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:09,875 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2022-03-03 18:41:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:41:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:09,876 INFO L225 Difference]: With dead ends: 276 [2022-03-03 18:41:09,876 INFO L226 Difference]: Without dead ends: 259 [2022-03-03 18:41:09,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:09,877 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:09,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 215 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-03 18:41:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2022-03-03 18:41:09,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.604651162790698) internal successors, (448), 172 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2022-03-03 18:41:09,882 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2022-03-03 18:41:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:09,882 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2022-03-03 18:41:09,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2022-03-03 18:41:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:09,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:09,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:09,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:10,106 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,SelfDestructingSolverStorable49 [2022-03-03 18:41:10,106 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash 273035759, now seen corresponding path program 37 times [2022-03-03 18:41:10,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:10,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290768346] [2022-03-03 18:41:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:10,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:10,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:10,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290768346] [2022-03-03 18:41:10,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290768346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:10,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800157688] [2022-03-03 18:41:10,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:10,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:10,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:10,199 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) [2022-03-03 18:41:10,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 18:41:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:10,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:10,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800157688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:10,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:10,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 18:41:10,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185302657] [2022-03-03 18:41:10,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:10,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:10,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:10,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:10,566 INFO L87 Difference]: Start difference. First operand 173 states and 448 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:10,782 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2022-03-03 18:41:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:41:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:10,784 INFO L225 Difference]: With dead ends: 277 [2022-03-03 18:41:10,784 INFO L226 Difference]: Without dead ends: 261 [2022-03-03 18:41:10,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:10,784 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:10,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 294 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-03 18:41:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-03-03 18:41:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.57396449704142) internal successors, (435), 169 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2022-03-03 18:41:10,789 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2022-03-03 18:41:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:10,789 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2022-03-03 18:41:10,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2022-03-03 18:41:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:10,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:10,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:10,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:11,007 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,SelfDestructingSolverStorable50 [2022-03-03 18:41:11,008 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:11,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1806258069, now seen corresponding path program 38 times [2022-03-03 18:41:11,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:11,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515323924] [2022-03-03 18:41:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:11,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:11,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:11,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515323924] [2022-03-03 18:41:11,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515323924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:11,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874955937] [2022-03-03 18:41:11,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:11,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:11,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:11,099 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) [2022-03-03 18:41:11,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 18:41:11,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:11,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:11,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:11,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874955937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:11,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:11,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-03 18:41:11,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054244349] [2022-03-03 18:41:11,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:11,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:41:11,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:11,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:41:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:41:11,519 INFO L87 Difference]: Start difference. First operand 170 states and 435 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:11,738 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2022-03-03 18:41:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:41:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:11,740 INFO L225 Difference]: With dead ends: 262 [2022-03-03 18:41:11,740 INFO L226 Difference]: Without dead ends: 244 [2022-03-03 18:41:11,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:11,740 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:11,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 227 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-03 18:41:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2022-03-03 18:41:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5773809523809526) internal successors, (433), 168 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2022-03-03 18:41:11,745 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2022-03-03 18:41:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:11,745 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2022-03-03 18:41:11,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2022-03-03 18:41:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:11,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:11,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:11,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-03 18:41:11,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:11,959 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1839857297, now seen corresponding path program 39 times [2022-03-03 18:41:11,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:11,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406990876] [2022-03-03 18:41:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:11,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:12,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:12,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406990876] [2022-03-03 18:41:12,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406990876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:12,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076524793] [2022-03-03 18:41:12,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:12,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:12,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:12,060 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) [2022-03-03 18:41:12,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 18:41:12,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 18:41:12,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:12,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:12,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:12,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076524793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:12,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:12,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 18:41:12,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070346662] [2022-03-03 18:41:12,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:12,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:12,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:12,433 INFO L87 Difference]: Start difference. First operand 169 states and 433 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:12,657 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2022-03-03 18:41:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:41:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:12,658 INFO L225 Difference]: With dead ends: 233 [2022-03-03 18:41:12,658 INFO L226 Difference]: Without dead ends: 226 [2022-03-03 18:41:12,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:41:12,659 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:12,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 240 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:12,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-03 18:41:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2022-03-03 18:41:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5402298850574714) internal successors, (442), 174 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2022-03-03 18:41:12,662 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2022-03-03 18:41:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:12,662 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2022-03-03 18:41:12,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2022-03-03 18:41:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:12,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:12,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:12,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:12,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:12,863 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1383679381, now seen corresponding path program 40 times [2022-03-03 18:41:12,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:12,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760750117] [2022-03-03 18:41:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:12,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:12,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:12,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760750117] [2022-03-03 18:41:12,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760750117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:12,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993612843] [2022-03-03 18:41:12,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:12,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:12,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:12,963 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) [2022-03-03 18:41:12,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 18:41:12,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:12,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:13,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:13,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993612843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:13,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:13,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 18:41:13,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729412695] [2022-03-03 18:41:13,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:13,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:13,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:13,358 INFO L87 Difference]: Start difference. First operand 175 states and 442 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:13,512 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2022-03-03 18:41:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:13,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:13,513 INFO L225 Difference]: With dead ends: 259 [2022-03-03 18:41:13,513 INFO L226 Difference]: Without dead ends: 249 [2022-03-03 18:41:13,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:13,514 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:13,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 191 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-03 18:41:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2022-03-03 18:41:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.569060773480663) internal successors, (465), 181 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2022-03-03 18:41:13,519 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2022-03-03 18:41:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:13,519 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2022-03-03 18:41:13,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2022-03-03 18:41:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:13,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:13,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:13,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:13,735 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,SelfDestructingSolverStorable53 [2022-03-03 18:41:13,735 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash 231023343, now seen corresponding path program 41 times [2022-03-03 18:41:13,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:13,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177855104] [2022-03-03 18:41:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:13,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:13,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177855104] [2022-03-03 18:41:13,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177855104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:13,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956139521] [2022-03-03 18:41:13,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:13,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:13,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:13,816 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) [2022-03-03 18:41:13,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 18:41:13,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:13,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:13,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:14,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956139521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:14,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:14,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 18:41:14,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012964796] [2022-03-03 18:41:14,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:14,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:41:14,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:41:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:41:14,190 INFO L87 Difference]: Start difference. First operand 182 states and 465 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:14,330 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2022-03-03 18:41:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:41:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:14,331 INFO L225 Difference]: With dead ends: 247 [2022-03-03 18:41:14,331 INFO L226 Difference]: Without dead ends: 240 [2022-03-03 18:41:14,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:14,332 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:14,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 164 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-03 18:41:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2022-03-03 18:41:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2022-03-03 18:41:14,336 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2022-03-03 18:41:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:14,337 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2022-03-03 18:41:14,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2022-03-03 18:41:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 18:41:14,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:14,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:14,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 18:41:14,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:14,551 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -812224575, now seen corresponding path program 42 times [2022-03-03 18:41:14,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:14,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396808296] [2022-03-03 18:41:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:14,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:14,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:14,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396808296] [2022-03-03 18:41:14,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396808296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:14,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201528621] [2022-03-03 18:41:14,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:14,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:14,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:14,631 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) [2022-03-03 18:41:14,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 18:41:14,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:14,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 18:41:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:14,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:14,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201528621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:14,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:14,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-03 18:41:14,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663674808] [2022-03-03 18:41:14,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:14,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:41:14,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:41:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:41:14,992 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:15,155 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2022-03-03 18:41:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 18:41:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:15,156 INFO L225 Difference]: With dead ends: 231 [2022-03-03 18:41:15,156 INFO L226 Difference]: Without dead ends: 224 [2022-03-03 18:41:15,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:41:15,157 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:15,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-03 18:41:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2022-03-03 18:41:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2022-03-03 18:41:15,161 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2022-03-03 18:41:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:15,161 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2022-03-03 18:41:15,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2022-03-03 18:41:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:15,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:15,162 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:15,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:15,375 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,SelfDestructingSolverStorable55 [2022-03-03 18:41:15,375 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:15,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2062140921, now seen corresponding path program 43 times [2022-03-03 18:41:15,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:15,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549963496] [2022-03-03 18:41:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:15,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:15,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:15,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549963496] [2022-03-03 18:41:15,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549963496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:15,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707086631] [2022-03-03 18:41:15,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:15,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:15,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:15,430 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) [2022-03-03 18:41:15,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 18:41:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:15,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:15,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:15,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:15,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707086631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:15,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:15,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-03 18:41:15,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831502402] [2022-03-03 18:41:15,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:15,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:41:15,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:41:15,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:41:15,529 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:15,625 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2022-03-03 18:41:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:41:15,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:15,627 INFO L225 Difference]: With dead ends: 295 [2022-03-03 18:41:15,627 INFO L226 Difference]: Without dead ends: 281 [2022-03-03 18:41:15,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:15,627 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:15,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-03 18:41:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2022-03-03 18:41:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2022-03-03 18:41:15,631 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2022-03-03 18:41:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:15,631 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2022-03-03 18:41:15,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2022-03-03 18:41:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:15,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:15,632 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:15,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-03 18:41:15,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:15,843 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1630888425, now seen corresponding path program 44 times [2022-03-03 18:41:15,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:15,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085175670] [2022-03-03 18:41:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:15,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:15,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085175670] [2022-03-03 18:41:15,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085175670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:15,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926636808] [2022-03-03 18:41:15,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:15,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:15,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:15,884 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) [2022-03-03 18:41:15,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 18:41:15,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:15,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:15,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926636808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:15,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:15,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-03 18:41:15,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673261632] [2022-03-03 18:41:15,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:15,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:41:15,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:41:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:41:15,996 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:16,092 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2022-03-03 18:41:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:16,094 INFO L225 Difference]: With dead ends: 302 [2022-03-03 18:41:16,094 INFO L226 Difference]: Without dead ends: 302 [2022-03-03 18:41:16,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:41:16,094 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:16,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 105 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-03 18:41:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2022-03-03 18:41:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.576923076923077) internal successors, (469), 182 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2022-03-03 18:41:16,099 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2022-03-03 18:41:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:16,099 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2022-03-03 18:41:16,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2022-03-03 18:41:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:16,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:16,100 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:16,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:16,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:16,315 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash 768473931, now seen corresponding path program 45 times [2022-03-03 18:41:16,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:16,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648521526] [2022-03-03 18:41:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:16,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:16,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:16,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648521526] [2022-03-03 18:41:16,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648521526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:16,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316968731] [2022-03-03 18:41:16,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:16,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:16,357 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) [2022-03-03 18:41:16,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 18:41:16,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:41:16,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:16,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:16,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:16,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316968731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:16,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:16,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:16,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615547919] [2022-03-03 18:41:16,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:16,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:16,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:16,479 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:16,669 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2022-03-03 18:41:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:41:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:16,671 INFO L225 Difference]: With dead ends: 476 [2022-03-03 18:41:16,671 INFO L226 Difference]: Without dead ends: 474 [2022-03-03 18:41:16,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:16,671 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:16,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 115 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-03 18:41:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2022-03-03 18:41:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.746606334841629) internal successors, (607), 221 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2022-03-03 18:41:16,677 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2022-03-03 18:41:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:16,677 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2022-03-03 18:41:16,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2022-03-03 18:41:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:16,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:16,678 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:16,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-03 18:41:16,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-03 18:41:16,882 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1339928737, now seen corresponding path program 46 times [2022-03-03 18:41:16,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:16,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389921281] [2022-03-03 18:41:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:16,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:16,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389921281] [2022-03-03 18:41:16,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389921281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:16,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832800494] [2022-03-03 18:41:16,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:16,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:16,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:16,921 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) [2022-03-03 18:41:16,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 18:41:16,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:16,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:16,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:17,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:17,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832800494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:17,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:17,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:17,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927174011] [2022-03-03 18:41:17,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:17,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:17,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:17,036 INFO L87 Difference]: Start difference. First operand 222 states and 607 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:17,279 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2022-03-03 18:41:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 18:41:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:17,280 INFO L225 Difference]: With dead ends: 476 [2022-03-03 18:41:17,281 INFO L226 Difference]: Without dead ends: 470 [2022-03-03 18:41:17,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:41:17,281 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:17,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 125 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-03 18:41:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2022-03-03 18:41:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.661764705882353) internal successors, (543), 204 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2022-03-03 18:41:17,287 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2022-03-03 18:41:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:17,287 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2022-03-03 18:41:17,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2022-03-03 18:41:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:17,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:17,288 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:17,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:17,503 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,SelfDestructingSolverStorable59 [2022-03-03 18:41:17,503 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash -591642809, now seen corresponding path program 47 times [2022-03-03 18:41:17,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:17,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525921062] [2022-03-03 18:41:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:17,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:17,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:17,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525921062] [2022-03-03 18:41:17,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525921062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:17,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195375859] [2022-03-03 18:41:17,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:17,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:17,543 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) [2022-03-03 18:41:17,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 18:41:17,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:41:17,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:17,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:17,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195375859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:17,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:17,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:17,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645454886] [2022-03-03 18:41:17,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:17,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:17,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:17,661 INFO L87 Difference]: Start difference. First operand 205 states and 543 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-03-03 18:41:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:17,881 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2022-03-03 18:41:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:41:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 18 [2022-03-03 18:41:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:17,882 INFO L225 Difference]: With dead ends: 423 [2022-03-03 18:41:17,882 INFO L226 Difference]: Without dead ends: 423 [2022-03-03 18:41:17,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:41:17,883 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:17,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 111 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-03 18:41:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2022-03-03 18:41:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6904761904761907) internal successors, (565), 210 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2022-03-03 18:41:17,889 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2022-03-03 18:41:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:17,889 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2022-03-03 18:41:17,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-03-03 18:41:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2022-03-03 18:41:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:17,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:17,890 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:17,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:18,107 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,SelfDestructingSolverStorable60 [2022-03-03 18:41:18,107 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1056233913, now seen corresponding path program 48 times [2022-03-03 18:41:18,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:18,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810697579] [2022-03-03 18:41:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:18,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:18,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:18,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810697579] [2022-03-03 18:41:18,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810697579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:18,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614047660] [2022-03-03 18:41:18,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:18,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:18,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:18,151 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) [2022-03-03 18:41:18,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 18:41:18,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:41:18,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:18,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:18,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:18,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614047660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:18,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:18,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:18,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828240879] [2022-03-03 18:41:18,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:18,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:18,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:18,274 INFO L87 Difference]: Start difference. First operand 211 states and 565 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:18,498 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2022-03-03 18:41:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:41:18,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:18,500 INFO L225 Difference]: With dead ends: 326 [2022-03-03 18:41:18,500 INFO L226 Difference]: Without dead ends: 322 [2022-03-03 18:41:18,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:41:18,500 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:18,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 82 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-03 18:41:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2022-03-03 18:41:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6666666666666665) internal successors, (544), 204 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2022-03-03 18:41:18,505 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2022-03-03 18:41:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:18,505 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2022-03-03 18:41:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2022-03-03 18:41:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:18,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:18,506 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:18,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:18,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:18,719 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1875158539, now seen corresponding path program 49 times [2022-03-03 18:41:18,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:18,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175978231] [2022-03-03 18:41:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:18,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:18,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175978231] [2022-03-03 18:41:18,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175978231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:18,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267088162] [2022-03-03 18:41:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:18,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:18,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:18,756 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) [2022-03-03 18:41:18,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 18:41:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:18,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:18,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:18,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267088162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:18,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:18,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:18,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591771789] [2022-03-03 18:41:18,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:18,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:18,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:18,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:18,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:18,873 INFO L87 Difference]: Start difference. First operand 205 states and 544 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:19,098 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2022-03-03 18:41:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:41:19,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:19,100 INFO L225 Difference]: With dead ends: 460 [2022-03-03 18:41:19,100 INFO L226 Difference]: Without dead ends: 451 [2022-03-03 18:41:19,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:41:19,100 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:19,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 94 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-03-03 18:41:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2022-03-03 18:41:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.682242990654206) internal successors, (574), 214 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2022-03-03 18:41:19,106 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2022-03-03 18:41:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:19,106 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2022-03-03 18:41:19,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2022-03-03 18:41:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:19,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:19,107 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:19,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 18:41:19,323 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,SelfDestructingSolverStorable62 [2022-03-03 18:41:19,323 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1287413217, now seen corresponding path program 50 times [2022-03-03 18:41:19,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:19,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44120211] [2022-03-03 18:41:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:19,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:19,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44120211] [2022-03-03 18:41:19,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44120211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:19,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890293757] [2022-03-03 18:41:19,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:19,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:19,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:19,370 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) [2022-03-03 18:41:19,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 18:41:19,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:19,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:19,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:19,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890293757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:19,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:19,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:19,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520331146] [2022-03-03 18:41:19,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:19,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:19,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:19,500 INFO L87 Difference]: Start difference. First operand 215 states and 574 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:19,711 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2022-03-03 18:41:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:41:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:19,713 INFO L225 Difference]: With dead ends: 374 [2022-03-03 18:41:19,713 INFO L226 Difference]: Without dead ends: 365 [2022-03-03 18:41:19,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:41:19,714 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:19,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 111 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-03-03 18:41:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2022-03-03 18:41:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.6728971962616823) internal successors, (572), 214 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2022-03-03 18:41:19,729 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2022-03-03 18:41:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:19,729 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2022-03-03 18:41:19,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2022-03-03 18:41:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:19,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:19,730 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:19,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:19,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:19,949 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash -134229365, now seen corresponding path program 51 times [2022-03-03 18:41:19,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:19,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077418639] [2022-03-03 18:41:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:19,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:19,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077418639] [2022-03-03 18:41:19,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077418639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:19,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312663818] [2022-03-03 18:41:19,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:19,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:19,984 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) [2022-03-03 18:41:19,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 18:41:20,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:41:20,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:20,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:20,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:20,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312663818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:20,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:20,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-03 18:41:20,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66412838] [2022-03-03 18:41:20,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:20,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:20,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:20,104 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:20,297 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2022-03-03 18:41:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:41:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:20,299 INFO L225 Difference]: With dead ends: 439 [2022-03-03 18:41:20,299 INFO L226 Difference]: Without dead ends: 436 [2022-03-03 18:41:20,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:20,299 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 112 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:20,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 93 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-03-03 18:41:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2022-03-03 18:41:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2022-03-03 18:41:20,304 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2022-03-03 18:41:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:20,304 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2022-03-03 18:41:20,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2022-03-03 18:41:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:20,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:20,305 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:20,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-03 18:41:20,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:20,522 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:20,523 INFO L85 PathProgramCache]: Analyzing trace with hash -598820469, now seen corresponding path program 52 times [2022-03-03 18:41:20,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:20,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745240183] [2022-03-03 18:41:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:20,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:20,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:20,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745240183] [2022-03-03 18:41:20,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745240183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:20,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996609354] [2022-03-03 18:41:20,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:20,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:20,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:20,553 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) [2022-03-03 18:41:20,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 18:41:20,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:20,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:20,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:20,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996609354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:20,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:20,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-03 18:41:20,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653668178] [2022-03-03 18:41:20,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:20,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:20,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:20,666 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:20,910 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2022-03-03 18:41:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 18:41:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:20,912 INFO L225 Difference]: With dead ends: 389 [2022-03-03 18:41:20,912 INFO L226 Difference]: Without dead ends: 383 [2022-03-03 18:41:20,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:41:20,912 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:20,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 110 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-03 18:41:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2022-03-03 18:41:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6511627906976742) internal successors, (570), 215 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2022-03-03 18:41:20,918 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2022-03-03 18:41:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:20,918 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2022-03-03 18:41:20,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2022-03-03 18:41:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:20,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:20,919 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:20,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:21,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:21,135 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:21,136 INFO L85 PathProgramCache]: Analyzing trace with hash -632419697, now seen corresponding path program 53 times [2022-03-03 18:41:21,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:21,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465626433] [2022-03-03 18:41:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:21,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:21,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:21,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465626433] [2022-03-03 18:41:21,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465626433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:21,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740156404] [2022-03-03 18:41:21,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:21,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:21,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:21,173 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) [2022-03-03 18:41:21,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 18:41:21,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:21,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:21,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740156404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:21,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:21,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-03 18:41:21,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411630145] [2022-03-03 18:41:21,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:21,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:21,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:21,302 INFO L87 Difference]: Start difference. First operand 216 states and 570 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:21,556 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2022-03-03 18:41:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:41:21,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:21,557 INFO L225 Difference]: With dead ends: 347 [2022-03-03 18:41:21,557 INFO L226 Difference]: Without dead ends: 339 [2022-03-03 18:41:21,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:41:21,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:21,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 105 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-03 18:41:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2022-03-03 18:41:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.65929203539823) internal successors, (601), 226 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2022-03-03 18:41:21,563 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2022-03-03 18:41:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:21,563 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2022-03-03 18:41:21,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2022-03-03 18:41:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:21,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:21,563 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:21,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-03 18:41:21,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:21,764 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1160685511, now seen corresponding path program 54 times [2022-03-03 18:41:21,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:21,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716306146] [2022-03-03 18:41:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:21,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:21,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:21,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716306146] [2022-03-03 18:41:21,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716306146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:21,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905709536] [2022-03-03 18:41:21,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:21,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:21,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:21,799 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) [2022-03-03 18:41:21,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 18:41:21,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:41:21,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:21,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:21,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:21,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905709536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:21,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:21,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-03-03 18:41:21,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254023875] [2022-03-03 18:41:21,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:21,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:21,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:21,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:21,955 INFO L87 Difference]: Start difference. First operand 227 states and 601 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:22,167 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2022-03-03 18:41:22,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:41:22,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:22,171 INFO L225 Difference]: With dead ends: 526 [2022-03-03 18:41:22,172 INFO L226 Difference]: Without dead ends: 523 [2022-03-03 18:41:22,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:22,172 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:22,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 155 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-03 18:41:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2022-03-03 18:41:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7472527472527473) internal successors, (750), 273 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2022-03-03 18:41:22,178 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2022-03-03 18:41:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:22,178 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2022-03-03 18:41:22,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2022-03-03 18:41:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:22,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:22,179 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:22,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:22,395 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,SelfDestructingSolverStorable67 [2022-03-03 18:41:22,395 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash 696094407, now seen corresponding path program 55 times [2022-03-03 18:41:22,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:22,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533989198] [2022-03-03 18:41:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:22,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:22,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:22,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533989198] [2022-03-03 18:41:22,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533989198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:22,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649935501] [2022-03-03 18:41:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:22,427 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) [2022-03-03 18:41:22,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 18:41:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:22,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:22,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649935501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:22,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:22,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-03-03 18:41:22,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555121897] [2022-03-03 18:41:22,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:22,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:22,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:22,554 INFO L87 Difference]: Start difference. First operand 274 states and 750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-03-03 18:41:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:22,828 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2022-03-03 18:41:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 18:41:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 18 [2022-03-03 18:41:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:22,830 INFO L225 Difference]: With dead ends: 468 [2022-03-03 18:41:22,830 INFO L226 Difference]: Without dead ends: 464 [2022-03-03 18:41:22,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:41:22,830 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:22,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 87 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-03 18:41:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2022-03-03 18:41:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.734317343173432) internal successors, (741), 271 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2022-03-03 18:41:22,837 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2022-03-03 18:41:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:22,837 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2022-03-03 18:41:22,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-03-03 18:41:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2022-03-03 18:41:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:22,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:22,838 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:22,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:23,060 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,SelfDestructingSolverStorable68 [2022-03-03 18:41:23,061 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash 662495179, now seen corresponding path program 56 times [2022-03-03 18:41:23,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:23,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515319340] [2022-03-03 18:41:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:23,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:23,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515319340] [2022-03-03 18:41:23,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515319340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:23,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383619314] [2022-03-03 18:41:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:23,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:23,105 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) [2022-03-03 18:41:23,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 18:41:23,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:23,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:23,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:23,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383619314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:23,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:23,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-03-03 18:41:23,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560527266] [2022-03-03 18:41:23,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:23,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:23,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:23,253 INFO L87 Difference]: Start difference. First operand 272 states and 741 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-03-03 18:41:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:23,540 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2022-03-03 18:41:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 18:41:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 18 [2022-03-03 18:41:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:23,543 INFO L225 Difference]: With dead ends: 487 [2022-03-03 18:41:23,543 INFO L226 Difference]: Without dead ends: 479 [2022-03-03 18:41:23,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:41:23,543 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:23,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 97 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-03 18:41:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2022-03-03 18:41:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 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) [2022-03-03 18:41:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2022-03-03 18:41:23,550 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2022-03-03 18:41:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:23,550 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2022-03-03 18:41:23,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-03-03 18:41:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2022-03-03 18:41:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:23,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:23,551 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:23,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 18:41:23,752 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,SelfDestructingSolverStorable69 [2022-03-03 18:41:23,752 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -379080889, now seen corresponding path program 57 times [2022-03-03 18:41:23,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:23,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136688867] [2022-03-03 18:41:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:23,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:23,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136688867] [2022-03-03 18:41:23,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136688867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:23,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533897069] [2022-03-03 18:41:23,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:23,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:23,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:23,800 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) [2022-03-03 18:41:23,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 18:41:23,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:41:23,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:23,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:23,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:23,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533897069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:23,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:23,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-03 18:41:23,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777917469] [2022-03-03 18:41:23,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:23,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:41:23,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:41:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:41:23,929 INFO L87 Difference]: Start difference. First operand 293 states and 815 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-03 18:41:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:24,196 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2022-03-03 18:41:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:41:24,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 18 [2022-03-03 18:41:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:24,199 INFO L225 Difference]: With dead ends: 466 [2022-03-03 18:41:24,199 INFO L226 Difference]: Without dead ends: 454 [2022-03-03 18:41:24,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:41:24,199 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 103 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-03-03 18:41:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2022-03-03 18:41:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.8006430868167205) internal successors, (871), 311 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2022-03-03 18:41:24,206 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2022-03-03 18:41:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:24,206 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2022-03-03 18:41:24,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-03 18:41:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2022-03-03 18:41:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:24,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:24,207 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:24,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:24,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:24,408 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1183743623, now seen corresponding path program 58 times [2022-03-03 18:41:24,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:24,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198637650] [2022-03-03 18:41:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:24,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:24,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:24,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198637650] [2022-03-03 18:41:24,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198637650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:24,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327763750] [2022-03-03 18:41:24,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:24,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:24,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:24,444 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) [2022-03-03 18:41:24,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 18:41:24,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:24,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:24,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:24,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:24,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327763750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:24,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:24,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-03 18:41:24,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991994376] [2022-03-03 18:41:24,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:24,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:41:24,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:24,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:41:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:41:24,558 INFO L87 Difference]: Start difference. First operand 312 states and 871 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:24,642 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2022-03-03 18:41:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:24,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:24,643 INFO L225 Difference]: With dead ends: 436 [2022-03-03 18:41:24,643 INFO L226 Difference]: Without dead ends: 436 [2022-03-03 18:41:24,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:41:24,644 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:24,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 70 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-03-03 18:41:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2022-03-03 18:41:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.812698412698413) internal successors, (886), 315 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2022-03-03 18:41:24,649 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2022-03-03 18:41:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:24,649 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2022-03-03 18:41:24,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2022-03-03 18:41:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:24,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:24,650 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:24,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-03 18:41:24,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:24,860 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1782526253, now seen corresponding path program 59 times [2022-03-03 18:41:24,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:24,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272117549] [2022-03-03 18:41:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:24,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:24,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272117549] [2022-03-03 18:41:24,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272117549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:24,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186196543] [2022-03-03 18:41:24,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:24,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:24,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:24,902 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) [2022-03-03 18:41:24,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 18:41:24,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:25,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:25,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186196543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:25,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:25,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:25,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703668261] [2022-03-03 18:41:25,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:25,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:25,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:25,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:25,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:25,037 INFO L87 Difference]: Start difference. First operand 316 states and 886 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:25,178 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2022-03-03 18:41:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:41:25,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:25,180 INFO L225 Difference]: With dead ends: 389 [2022-03-03 18:41:25,180 INFO L226 Difference]: Without dead ends: 389 [2022-03-03 18:41:25,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:25,180 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:25,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 60 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-03 18:41:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2022-03-03 18:41:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8144654088050314) internal successors, (895), 318 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2022-03-03 18:41:25,186 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2022-03-03 18:41:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:25,187 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2022-03-03 18:41:25,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2022-03-03 18:41:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:25,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:25,188 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:25,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:25,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:25,399 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 324257867, now seen corresponding path program 60 times [2022-03-03 18:41:25,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:25,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463439344] [2022-03-03 18:41:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:25,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:25,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463439344] [2022-03-03 18:41:25,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463439344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:25,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242860826] [2022-03-03 18:41:25,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:25,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:25,440 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) [2022-03-03 18:41:25,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 18:41:25,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:25,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:25,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:25,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:25,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242860826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:25,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:25,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:25,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385609906] [2022-03-03 18:41:25,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:25,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:25,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:25,567 INFO L87 Difference]: Start difference. First operand 319 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:25,726 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2022-03-03 18:41:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:41:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:25,728 INFO L225 Difference]: With dead ends: 399 [2022-03-03 18:41:25,728 INFO L226 Difference]: Without dead ends: 399 [2022-03-03 18:41:25,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:25,728 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:25,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 80 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-03 18:41:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2022-03-03 18:41:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8161993769470404) internal successors, (904), 321 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2022-03-03 18:41:25,735 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2022-03-03 18:41:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:25,735 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2022-03-03 18:41:25,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2022-03-03 18:41:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:25,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:25,736 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:25,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:25,960 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,SelfDestructingSolverStorable73 [2022-03-03 18:41:25,960 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1824538669, now seen corresponding path program 61 times [2022-03-03 18:41:25,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:25,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162119450] [2022-03-03 18:41:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:26,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:26,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162119450] [2022-03-03 18:41:26,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162119450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:26,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163005566] [2022-03-03 18:41:26,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:26,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:26,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:26,005 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) [2022-03-03 18:41:26,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 18:41:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:26,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:26,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163005566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:26,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:26,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:26,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958235898] [2022-03-03 18:41:26,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:26,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:26,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:26,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:26,139 INFO L87 Difference]: Start difference. First operand 322 states and 904 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:26,372 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2022-03-03 18:41:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:41:26,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:26,374 INFO L225 Difference]: With dead ends: 497 [2022-03-03 18:41:26,374 INFO L226 Difference]: Without dead ends: 497 [2022-03-03 18:41:26,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:41:26,374 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:26,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 108 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-03 18:41:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2022-03-03 18:41:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8207547169811322) internal successors, (897), 318 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2022-03-03 18:41:26,379 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2022-03-03 18:41:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:26,379 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2022-03-03 18:41:26,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2022-03-03 18:41:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:26,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:26,380 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:26,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:26,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:26,580 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1253083863, now seen corresponding path program 62 times [2022-03-03 18:41:26,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:26,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287155929] [2022-03-03 18:41:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:26,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:26,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:26,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287155929] [2022-03-03 18:41:26,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287155929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:26,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560659004] [2022-03-03 18:41:26,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:26,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:26,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:26,628 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) [2022-03-03 18:41:26,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 18:41:26,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:26,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:26,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560659004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:26,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:26,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:26,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565152985] [2022-03-03 18:41:26,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:26,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:26,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:26,752 INFO L87 Difference]: Start difference. First operand 319 states and 897 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:26,972 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2022-03-03 18:41:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:41:26,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:26,974 INFO L225 Difference]: With dead ends: 422 [2022-03-03 18:41:26,974 INFO L226 Difference]: Without dead ends: 416 [2022-03-03 18:41:26,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:41:26,975 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:26,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 92 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-03 18:41:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2022-03-03 18:41:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.8108974358974357) internal successors, (877), 312 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2022-03-03 18:41:26,981 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2022-03-03 18:41:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:26,981 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2022-03-03 18:41:26,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2022-03-03 18:41:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:26,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:26,982 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:27,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 18:41:27,195 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,SelfDestructingSolverStorable75 [2022-03-03 18:41:27,195 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1110311887, now seen corresponding path program 63 times [2022-03-03 18:41:27,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:27,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257639573] [2022-03-03 18:41:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:27,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:27,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:27,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257639573] [2022-03-03 18:41:27,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257639573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:27,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933086290] [2022-03-03 18:41:27,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:27,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:27,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:27,232 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) [2022-03-03 18:41:27,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 18:41:27,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:41:27,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:27,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:27,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933086290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:27,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:27,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:27,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765760908] [2022-03-03 18:41:27,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:27,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:27,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:27,355 INFO L87 Difference]: Start difference. First operand 313 states and 877 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-03-03 18:41:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:27,540 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2022-03-03 18:41:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:41:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 18 [2022-03-03 18:41:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:27,542 INFO L225 Difference]: With dead ends: 573 [2022-03-03 18:41:27,542 INFO L226 Difference]: Without dead ends: 570 [2022-03-03 18:41:27,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:27,543 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:27,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 123 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-03 18:41:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2022-03-03 18:41:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.875) internal successors, (1012), 352 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2022-03-03 18:41:27,549 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2022-03-03 18:41:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:27,549 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2022-03-03 18:41:27,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-03-03 18:41:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2022-03-03 18:41:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:27,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:27,550 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:27,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 18:41:27,750 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,SelfDestructingSolverStorable76 [2022-03-03 18:41:27,751 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash 645720783, now seen corresponding path program 64 times [2022-03-03 18:41:27,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:27,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011794147] [2022-03-03 18:41:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:27,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:27,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:27,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011794147] [2022-03-03 18:41:27,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011794147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:27,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601088576] [2022-03-03 18:41:27,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:27,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:27,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:27,789 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) [2022-03-03 18:41:27,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 18:41:27,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:27,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:27,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601088576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:27,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:27,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:27,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400963110] [2022-03-03 18:41:27,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:27,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:27,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:27,899 INFO L87 Difference]: Start difference. First operand 353 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:28,138 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2022-03-03 18:41:28,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 18:41:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:28,140 INFO L225 Difference]: With dead ends: 554 [2022-03-03 18:41:28,140 INFO L226 Difference]: Without dead ends: 550 [2022-03-03 18:41:28,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:41:28,140 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:28,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 110 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-03 18:41:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2022-03-03 18:41:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.8228228228228227) internal successors, (940), 333 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2022-03-03 18:41:28,146 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2022-03-03 18:41:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:28,146 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2022-03-03 18:41:28,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2022-03-03 18:41:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:28,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:28,147 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:28,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-03 18:41:28,363 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,SelfDestructingSolverStorable77 [2022-03-03 18:41:28,363 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash 612121555, now seen corresponding path program 65 times [2022-03-03 18:41:28,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:28,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210455612] [2022-03-03 18:41:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:28,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:28,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:28,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210455612] [2022-03-03 18:41:28,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210455612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:28,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491814663] [2022-03-03 18:41:28,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:28,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:28,404 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) [2022-03-03 18:41:28,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 18:41:28,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:28,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:28,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:28,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491814663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:28,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:28,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:28,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398515853] [2022-03-03 18:41:28,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:28,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:28,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:28,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:28,511 INFO L87 Difference]: Start difference. First operand 334 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:28,725 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2022-03-03 18:41:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:41:28,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:28,727 INFO L225 Difference]: With dead ends: 542 [2022-03-03 18:41:28,727 INFO L226 Difference]: Without dead ends: 534 [2022-03-03 18:41:28,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:41:28,727 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:28,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 86 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-03 18:41:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2022-03-03 18:41:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.829971181556196) internal successors, (982), 347 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2022-03-03 18:41:28,733 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2022-03-03 18:41:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:28,733 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2022-03-03 18:41:28,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2022-03-03 18:41:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:28,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:28,733 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:28,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:28,934 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,SelfDestructingSolverStorable78 [2022-03-03 18:41:28,934 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash -429454513, now seen corresponding path program 66 times [2022-03-03 18:41:28,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:28,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929065673] [2022-03-03 18:41:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:28,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:28,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:28,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929065673] [2022-03-03 18:41:28,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929065673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:28,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910257988] [2022-03-03 18:41:28,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:28,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:28,984 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) [2022-03-03 18:41:28,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 18:41:29,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:29,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:29,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:29,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:29,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:29,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910257988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:29,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:29,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 18:41:29,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966813900] [2022-03-03 18:41:29,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:29,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:29,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:29,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:29,092 INFO L87 Difference]: Start difference. First operand 348 states and 982 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:29,255 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2022-03-03 18:41:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:41:29,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:29,257 INFO L225 Difference]: With dead ends: 473 [2022-03-03 18:41:29,257 INFO L226 Difference]: Without dead ends: 467 [2022-03-03 18:41:29,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:41:29,257 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:29,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 94 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:29,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-03-03 18:41:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2022-03-03 18:41:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.82183908045977) internal successors, (982), 348 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2022-03-03 18:41:29,263 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2022-03-03 18:41:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:29,263 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2022-03-03 18:41:29,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2022-03-03 18:41:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:29,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:29,264 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:29,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 18:41:29,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:29,468 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2002349101, now seen corresponding path program 67 times [2022-03-03 18:41:29,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:29,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375628897] [2022-03-03 18:41:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:29,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:29,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375628897] [2022-03-03 18:41:29,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375628897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:29,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606737046] [2022-03-03 18:41:29,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:29,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:29,503 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) [2022-03-03 18:41:29,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 18:41:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:29,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:29,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:29,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:29,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606737046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:29,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:29,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-03 18:41:29,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957738921] [2022-03-03 18:41:29,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:29,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:41:29,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:41:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:41:29,601 INFO L87 Difference]: Start difference. First operand 349 states and 982 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:29,669 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2022-03-03 18:41:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:41:29,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:29,671 INFO L225 Difference]: With dead ends: 405 [2022-03-03 18:41:29,671 INFO L226 Difference]: Without dead ends: 397 [2022-03-03 18:41:29,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:29,672 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:29,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 56 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:41:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-03-03 18:41:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2022-03-03 18:41:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8189655172413794) internal successors, (981), 348 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2022-03-03 18:41:29,677 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2022-03-03 18:41:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:29,678 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2022-03-03 18:41:29,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2022-03-03 18:41:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:29,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:29,678 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:29,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-03 18:41:29,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:29,879 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:29,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 752388103, now seen corresponding path program 68 times [2022-03-03 18:41:29,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:29,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498226427] [2022-03-03 18:41:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:29,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:29,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498226427] [2022-03-03 18:41:29,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498226427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:29,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199011428] [2022-03-03 18:41:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:29,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:29,924 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) [2022-03-03 18:41:29,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 18:41:29,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:29,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:30,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:30,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199011428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:30,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:30,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-03 18:41:30,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131283183] [2022-03-03 18:41:30,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:30,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:30,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:30,040 INFO L87 Difference]: Start difference. First operand 349 states and 981 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:30,227 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2022-03-03 18:41:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:41:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:30,229 INFO L225 Difference]: With dead ends: 447 [2022-03-03 18:41:30,229 INFO L226 Difference]: Without dead ends: 447 [2022-03-03 18:41:30,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:41:30,230 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:30,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-03 18:41:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2022-03-03 18:41:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.818696883852691) internal successors, (995), 353 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2022-03-03 18:41:30,236 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2022-03-03 18:41:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:30,236 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2022-03-03 18:41:30,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2022-03-03 18:41:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:30,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:30,237 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:30,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-03 18:41:30,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:30,438 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:30,438 INFO L85 PathProgramCache]: Analyzing trace with hash -549996793, now seen corresponding path program 69 times [2022-03-03 18:41:30,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:30,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356708107] [2022-03-03 18:41:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:30,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:30,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:30,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356708107] [2022-03-03 18:41:30,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356708107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:30,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660757480] [2022-03-03 18:41:30,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:30,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:30,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:30,475 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) [2022-03-03 18:41:30,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 18:41:30,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:41:30,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:30,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:30,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:30,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660757480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:30,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:30,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-03 18:41:30,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6501234] [2022-03-03 18:41:30,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:30,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:30,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:30,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:30,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:30,591 INFO L87 Difference]: Start difference. First operand 354 states and 995 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:30,780 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2022-03-03 18:41:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:41:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:30,782 INFO L225 Difference]: With dead ends: 485 [2022-03-03 18:41:30,782 INFO L226 Difference]: Without dead ends: 483 [2022-03-03 18:41:30,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:30,782 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:30,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 98 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-03 18:41:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2022-03-03 18:41:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8290598290598292) internal successors, (993), 351 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2022-03-03 18:41:30,789 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2022-03-03 18:41:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:30,789 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2022-03-03 18:41:30,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2022-03-03 18:41:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:30,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:30,790 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:30,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-03 18:41:30,990 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,SelfDestructingSolverStorable82 [2022-03-03 18:41:30,990 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash -592009209, now seen corresponding path program 70 times [2022-03-03 18:41:30,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:30,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019952280] [2022-03-03 18:41:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:31,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:31,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019952280] [2022-03-03 18:41:31,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019952280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:31,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446302406] [2022-03-03 18:41:31,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:31,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:31,025 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) [2022-03-03 18:41:31,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 18:41:31,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:31,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:31,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:31,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:31,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446302406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:31,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:31,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-03 18:41:31,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885984373] [2022-03-03 18:41:31,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:31,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:31,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:31,153 INFO L87 Difference]: Start difference. First operand 352 states and 993 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:31,375 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2022-03-03 18:41:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:41:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:31,378 INFO L225 Difference]: With dead ends: 553 [2022-03-03 18:41:31,378 INFO L226 Difference]: Without dead ends: 553 [2022-03-03 18:41:31,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:31,378 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:31,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 97 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-03 18:41:31,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2022-03-03 18:41:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.824858757062147) internal successors, (1000), 354 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2022-03-03 18:41:31,385 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2022-03-03 18:41:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:31,385 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2022-03-03 18:41:31,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2022-03-03 18:41:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:31,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:31,386 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:31,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:31,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:31,599 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash -20554403, now seen corresponding path program 71 times [2022-03-03 18:41:31,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:31,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227649768] [2022-03-03 18:41:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:31,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:31,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227649768] [2022-03-03 18:41:31,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227649768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:31,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327801547] [2022-03-03 18:41:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:31,655 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) [2022-03-03 18:41:31,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 18:41:31,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:31,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:31,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327801547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:31,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:31,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-03 18:41:31,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060308401] [2022-03-03 18:41:31,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:31,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:31,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:31,818 INFO L87 Difference]: Start difference. First operand 355 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:32,061 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2022-03-03 18:41:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 18:41:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:32,062 INFO L225 Difference]: With dead ends: 530 [2022-03-03 18:41:32,062 INFO L226 Difference]: Without dead ends: 521 [2022-03-03 18:41:32,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:41:32,063 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:32,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 100 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-03 18:41:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2022-03-03 18:41:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.8) internal successors, (952), 340 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2022-03-03 18:41:32,068 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2022-03-03 18:41:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:32,068 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2022-03-03 18:41:32,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2022-03-03 18:41:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:32,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:32,069 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:32,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 18:41:32,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:32,270 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 514675399, now seen corresponding path program 72 times [2022-03-03 18:41:32,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:32,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016431052] [2022-03-03 18:41:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:32,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:32,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:32,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016431052] [2022-03-03 18:41:32,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016431052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:32,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245155890] [2022-03-03 18:41:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:32,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:32,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:32,313 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) [2022-03-03 18:41:32,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 18:41:32,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:32,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:32,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245155890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:32,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:32,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-03 18:41:32,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831460684] [2022-03-03 18:41:32,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:32,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:32,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:32,454 INFO L87 Difference]: Start difference. First operand 341 states and 952 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:32,694 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2022-03-03 18:41:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:41:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:32,695 INFO L225 Difference]: With dead ends: 483 [2022-03-03 18:41:32,695 INFO L226 Difference]: Without dead ends: 471 [2022-03-03 18:41:32,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:41:32,697 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 98 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:32,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 95 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-03 18:41:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2022-03-03 18:41:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.809798270893372) internal successors, (975), 347 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2022-03-03 18:41:32,702 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2022-03-03 18:41:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:32,702 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2022-03-03 18:41:32,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2022-03-03 18:41:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:32,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:32,703 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:32,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 18:41:32,903 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,SelfDestructingSolverStorable85 [2022-03-03 18:41:32,903 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2025321811, now seen corresponding path program 73 times [2022-03-03 18:41:32,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:32,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970313188] [2022-03-03 18:41:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:32,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:32,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:32,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970313188] [2022-03-03 18:41:32,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970313188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:32,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734419230] [2022-03-03 18:41:32,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:32,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:32,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:32,939 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) [2022-03-03 18:41:32,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 18:41:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:32,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:33,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:33,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734419230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:33,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:33,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-03 18:41:33,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388967129] [2022-03-03 18:41:33,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:33,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:41:33,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:41:33,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:41:33,066 INFO L87 Difference]: Start difference. First operand 348 states and 975 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:33,292 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2022-03-03 18:41:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:41:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:33,293 INFO L225 Difference]: With dead ends: 521 [2022-03-03 18:41:33,293 INFO L226 Difference]: Without dead ends: 521 [2022-03-03 18:41:33,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:41:33,293 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:33,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 105 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-03 18:41:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2022-03-03 18:41:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.8147138964577656) internal successors, (1033), 367 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2022-03-03 18:41:33,298 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2022-03-03 18:41:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:33,298 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2022-03-03 18:41:33,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2022-03-03 18:41:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:33,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:33,299 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:33,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:33,499 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,SelfDestructingSolverStorable86 [2022-03-03 18:41:33,499 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1882087477, now seen corresponding path program 74 times [2022-03-03 18:41:33,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:33,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491695113] [2022-03-03 18:41:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:33,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:33,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:33,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491695113] [2022-03-03 18:41:33,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491695113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:33,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594511766] [2022-03-03 18:41:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:33,534 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) [2022-03-03 18:41:33,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 18:41:33,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:33,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:33,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:33,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:33,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:33,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594511766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:33,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:33,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-03-03 18:41:33,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199817602] [2022-03-03 18:41:33,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:33,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:33,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:33,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:33,657 INFO L87 Difference]: Start difference. First operand 368 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:33,878 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2022-03-03 18:41:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:41:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:33,880 INFO L225 Difference]: With dead ends: 613 [2022-03-03 18:41:33,880 INFO L226 Difference]: Without dead ends: 613 [2022-03-03 18:41:33,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:41:33,881 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:33,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 164 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-03 18:41:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2022-03-03 18:41:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.8567961165048543) internal successors, (1177), 412 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2022-03-03 18:41:33,889 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2022-03-03 18:41:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:33,889 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2022-03-03 18:41:33,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2022-03-03 18:41:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:33,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:33,890 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:33,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:34,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:34,103 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:34,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1038301613, now seen corresponding path program 75 times [2022-03-03 18:41:34,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:34,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091454781] [2022-03-03 18:41:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:34,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:34,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:34,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091454781] [2022-03-03 18:41:34,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091454781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:34,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242490672] [2022-03-03 18:41:34,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:34,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:34,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:34,141 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) [2022-03-03 18:41:34,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 18:41:34,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:41:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:34,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:34,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242490672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:34,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:34,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-03-03 18:41:34,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061807099] [2022-03-03 18:41:34,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:34,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:34,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:34,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:34,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:34,286 INFO L87 Difference]: Start difference. First operand 413 states and 1177 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:34,508 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2022-03-03 18:41:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:41:34,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:34,510 INFO L225 Difference]: With dead ends: 723 [2022-03-03 18:41:34,510 INFO L226 Difference]: Without dead ends: 723 [2022-03-03 18:41:34,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:34,511 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:34,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 107 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-03-03 18:41:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2022-03-03 18:41:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9110169491525424) internal successors, (1374), 472 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2022-03-03 18:41:34,520 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2022-03-03 18:41:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:34,521 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2022-03-03 18:41:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2022-03-03 18:41:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:34,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:34,522 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:34,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:34,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:34,743 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash -466846807, now seen corresponding path program 76 times [2022-03-03 18:41:34,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:34,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423941807] [2022-03-03 18:41:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:34,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:34,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:34,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423941807] [2022-03-03 18:41:34,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423941807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:34,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813735179] [2022-03-03 18:41:34,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:34,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:34,774 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) [2022-03-03 18:41:34,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 18:41:34,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:34,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:34,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813735179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:34,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:34,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-03-03 18:41:34,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000672509] [2022-03-03 18:41:34,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:34,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:41:34,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:34,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:41:34,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:41:34,894 INFO L87 Difference]: Start difference. First operand 473 states and 1374 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:35,203 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2022-03-03 18:41:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 18:41:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:35,204 INFO L225 Difference]: With dead ends: 693 [2022-03-03 18:41:35,204 INFO L226 Difference]: Without dead ends: 687 [2022-03-03 18:41:35,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:41:35,205 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:35,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 103 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-03 18:41:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2022-03-03 18:41:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.8896103896103895) internal successors, (1335), 462 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2022-03-03 18:41:35,212 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2022-03-03 18:41:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:35,212 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2022-03-03 18:41:35,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2022-03-03 18:41:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:35,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:35,213 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:35,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-03 18:41:35,413 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,SelfDestructingSolverStorable89 [2022-03-03 18:41:35,413 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash 68382995, now seen corresponding path program 77 times [2022-03-03 18:41:35,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:35,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139266864] [2022-03-03 18:41:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:35,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:35,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139266864] [2022-03-03 18:41:35,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139266864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:35,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248053670] [2022-03-03 18:41:35,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:35,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:35,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:35,452 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) [2022-03-03 18:41:35,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 18:41:35,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:35,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:35,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248053670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:35,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:35,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-03-03 18:41:35,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423378596] [2022-03-03 18:41:35,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:35,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:41:35,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:41:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:41:35,598 INFO L87 Difference]: Start difference. First operand 463 states and 1335 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:35,865 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2022-03-03 18:41:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 18:41:35,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:35,867 INFO L225 Difference]: With dead ends: 706 [2022-03-03 18:41:35,867 INFO L226 Difference]: Without dead ends: 694 [2022-03-03 18:41:35,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:41:35,867 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:35,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 113 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-03 18:41:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2022-03-03 18:41:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.903157894736842) internal successors, (1379), 475 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2022-03-03 18:41:35,874 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2022-03-03 18:41:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:35,874 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2022-03-03 18:41:35,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2022-03-03 18:41:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 18:41:35,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:35,875 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:35,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 18:41:36,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:36,076 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -519362327, now seen corresponding path program 78 times [2022-03-03 18:41:36,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:36,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045171136] [2022-03-03 18:41:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:36,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:36,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045171136] [2022-03-03 18:41:36,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045171136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:36,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432599391] [2022-03-03 18:41:36,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:36,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:36,124 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) [2022-03-03 18:41:36,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 18:41:36,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:36,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:36,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 18:41:36,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:36,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:36,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432599391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:36,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:36,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-03 18:41:36,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187561448] [2022-03-03 18:41:36,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:36,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:41:36,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:41:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:41:36,259 INFO L87 Difference]: Start difference. First operand 476 states and 1379 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:36,480 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2022-03-03 18:41:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:41:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 18:41:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:36,482 INFO L225 Difference]: With dead ends: 674 [2022-03-03 18:41:36,482 INFO L226 Difference]: Without dead ends: 656 [2022-03-03 18:41:36,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:41:36,482 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:36,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 68 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-03-03 18:41:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2022-03-03 18:41:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.9014084507042255) internal successors, (1442), 497 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2022-03-03 18:41:36,491 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2022-03-03 18:41:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:36,491 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2022-03-03 18:41:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2022-03-03 18:41:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:36,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:36,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:36,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:36,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:36,706 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1008686311, now seen corresponding path program 79 times [2022-03-03 18:41:36,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:36,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671604454] [2022-03-03 18:41:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:36,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:36,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671604454] [2022-03-03 18:41:36,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671604454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:36,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914141195] [2022-03-03 18:41:36,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:36,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:36,852 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) [2022-03-03 18:41:36,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 18:41:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:37,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:37,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914141195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:37,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:37,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 18:41:37,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883269614] [2022-03-03 18:41:37,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:37,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:41:37,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:37,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:41:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:41:37,323 INFO L87 Difference]: Start difference. First operand 498 states and 1442 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:37,662 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2022-03-03 18:41:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:41:37,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:37,664 INFO L225 Difference]: With dead ends: 678 [2022-03-03 18:41:37,664 INFO L226 Difference]: Without dead ends: 655 [2022-03-03 18:41:37,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:37,664 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 103 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:37,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 343 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-03 18:41:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2022-03-03 18:41:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.8679245283018866) internal successors, (1520), 530 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2022-03-03 18:41:37,672 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2022-03-03 18:41:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:37,673 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2022-03-03 18:41:37,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:37,673 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2022-03-03 18:41:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:37,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:37,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:37,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 18:41:37,874 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,SelfDestructingSolverStorable92 [2022-03-03 18:41:37,874 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -455666133, now seen corresponding path program 80 times [2022-03-03 18:41:37,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:37,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154533016] [2022-03-03 18:41:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:37,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:37,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154533016] [2022-03-03 18:41:37,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154533016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:37,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857232172] [2022-03-03 18:41:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:37,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:37,991 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) [2022-03-03 18:41:37,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 18:41:38,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:38,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:38,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:38,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857232172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:38,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:38,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 18:41:38,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994733283] [2022-03-03 18:41:38,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:38,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:41:38,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:41:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:38,471 INFO L87 Difference]: Start difference. First operand 531 states and 1520 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:38,725 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2022-03-03 18:41:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:41:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:38,727 INFO L225 Difference]: With dead ends: 714 [2022-03-03 18:41:38,727 INFO L226 Difference]: Without dead ends: 707 [2022-03-03 18:41:38,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:38,727 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 138 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:38,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 386 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-03-03 18:41:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2022-03-03 18:41:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.895306859205776) internal successors, (1604), 554 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2022-03-03 18:41:38,736 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2022-03-03 18:41:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:38,736 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2022-03-03 18:41:38,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2022-03-03 18:41:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:38,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:38,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:38,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-03 18:41:38,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:38,938 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1159036591, now seen corresponding path program 81 times [2022-03-03 18:41:38,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:38,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507665321] [2022-03-03 18:41:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:39,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:39,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507665321] [2022-03-03 18:41:39,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507665321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:39,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626644470] [2022-03-03 18:41:39,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:39,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:39,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:39,048 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) [2022-03-03 18:41:39,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 18:41:39,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:41:39,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:39,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:39,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:39,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626644470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:39,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:39,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 18:41:39,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843274383] [2022-03-03 18:41:39,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:39,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:41:39,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:41:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:39,465 INFO L87 Difference]: Start difference. First operand 555 states and 1604 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-03-03 18:41:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:39,733 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2022-03-03 18:41:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:41:39,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 19 [2022-03-03 18:41:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:39,735 INFO L225 Difference]: With dead ends: 700 [2022-03-03 18:41:39,735 INFO L226 Difference]: Without dead ends: 684 [2022-03-03 18:41:39,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:41:39,735 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:39,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 370 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-03 18:41:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2022-03-03 18:41:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2022-03-03 18:41:39,742 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2022-03-03 18:41:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:39,742 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2022-03-03 18:41:39,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-03-03 18:41:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2022-03-03 18:41:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:39,743 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:39,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:39,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-03 18:41:39,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:39,944 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 115788673, now seen corresponding path program 82 times [2022-03-03 18:41:39,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:39,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744598020] [2022-03-03 18:41:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:40,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:40,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744598020] [2022-03-03 18:41:40,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744598020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:40,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055571090] [2022-03-03 18:41:40,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:40,069 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) [2022-03-03 18:41:40,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 18:41:40,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:40,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:40,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:40,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:40,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055571090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:40,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:40,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 18:41:40,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896645868] [2022-03-03 18:41:40,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:40,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:41:40,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:41:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:40,491 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:40,775 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2022-03-03 18:41:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:41:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:40,776 INFO L225 Difference]: With dead ends: 698 [2022-03-03 18:41:40,777 INFO L226 Difference]: Without dead ends: 691 [2022-03-03 18:41:40,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:40,777 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 113 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:40,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 375 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-03 18:41:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2022-03-03 18:41:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2022-03-03 18:41:40,784 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2022-03-03 18:41:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:40,784 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2022-03-03 18:41:40,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2022-03-03 18:41:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:40,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:40,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:40,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:40,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:40,986 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 651018475, now seen corresponding path program 83 times [2022-03-03 18:41:40,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:40,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114567125] [2022-03-03 18:41:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:40,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:41,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:41,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114567125] [2022-03-03 18:41:41,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114567125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:41,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088279744] [2022-03-03 18:41:41,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:41,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:41,092 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) [2022-03-03 18:41:41,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 18:41:41,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:41,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:41,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:41,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088279744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:41,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:41,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 18:41:41,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522085134] [2022-03-03 18:41:41,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:41,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:41:41,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:41:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:41,562 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:41,887 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2022-03-03 18:41:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:41:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:41,888 INFO L225 Difference]: With dead ends: 664 [2022-03-03 18:41:41,888 INFO L226 Difference]: Without dead ends: 657 [2022-03-03 18:41:41,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:41,889 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 97 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:41,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 400 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-03 18:41:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2022-03-03 18:41:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2022-03-03 18:41:41,896 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2022-03-03 18:41:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:41,896 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2022-03-03 18:41:41,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2022-03-03 18:41:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:41,901 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:41,901 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:41,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-03 18:41:42,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:42,102 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2144423449, now seen corresponding path program 84 times [2022-03-03 18:41:42,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:42,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108460195] [2022-03-03 18:41:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:42,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:42,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108460195] [2022-03-03 18:41:42,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108460195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:42,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114528692] [2022-03-03 18:41:42,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:42,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:42,220 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) [2022-03-03 18:41:42,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 18:41:42,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:41:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:42,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:42,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114528692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:42,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:42,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 20 [2022-03-03 18:41:42,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626630751] [2022-03-03 18:41:42,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:42,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:41:42,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:41:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:42,679 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2022-03-03 18:41:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:42,894 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2022-03-03 18:41:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:42,895 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 19 [2022-03-03 18:41:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:42,896 INFO L225 Difference]: With dead ends: 660 [2022-03-03 18:41:42,896 INFO L226 Difference]: Without dead ends: 653 [2022-03-03 18:41:42,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:41:42,897 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:42,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 342 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-03 18:41:42,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2022-03-03 18:41:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9097472924187726) internal successors, (1612), 554 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2022-03-03 18:41:42,905 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2022-03-03 18:41:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:42,906 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2022-03-03 18:41:42,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2022-03-03 18:41:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2022-03-03 18:41:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:42,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:42,907 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:42,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:43,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:43,129 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash -529720725, now seen corresponding path program 85 times [2022-03-03 18:41:43,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:43,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285830638] [2022-03-03 18:41:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:43,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:43,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:43,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285830638] [2022-03-03 18:41:43,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285830638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:43,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498522932] [2022-03-03 18:41:43,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:43,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:43,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:43,251 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) [2022-03-03 18:41:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 18:41:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:43,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:43,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:43,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498522932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:43,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:43,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2022-03-03 18:41:43,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866863994] [2022-03-03 18:41:43,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:43,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:41:43,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:43,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:41:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:43,692 INFO L87 Difference]: Start difference. First operand 555 states and 1612 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2022-03-03 18:41:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:43,900 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2022-03-03 18:41:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:41:43,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 19 [2022-03-03 18:41:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:43,902 INFO L225 Difference]: With dead ends: 661 [2022-03-03 18:41:43,902 INFO L226 Difference]: Without dead ends: 652 [2022-03-03 18:41:43,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:43,902 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:43,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 308 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-03-03 18:41:43,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2022-03-03 18:41:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2022-03-03 18:41:43,912 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2022-03-03 18:41:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:43,912 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2022-03-03 18:41:43,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2022-03-03 18:41:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2022-03-03 18:41:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:43,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:43,913 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:43,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:44,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-03 18:41:44,127 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1685952743, now seen corresponding path program 86 times [2022-03-03 18:41:44,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:44,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966001916] [2022-03-03 18:41:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:44,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:44,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966001916] [2022-03-03 18:41:44,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966001916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:44,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102897693] [2022-03-03 18:41:44,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:44,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:44,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:44,247 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) [2022-03-03 18:41:44,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 18:41:44,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:44,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:44,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102897693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:44,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:44,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 19 [2022-03-03 18:41:44,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64264024] [2022-03-03 18:41:44,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:44,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:41:44,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:41:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:44,741 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-03-03 18:41:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:44,952 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2022-03-03 18:41:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:41:44,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 19 [2022-03-03 18:41:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:44,953 INFO L225 Difference]: With dead ends: 635 [2022-03-03 18:41:44,953 INFO L226 Difference]: Without dead ends: 628 [2022-03-03 18:41:44,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:41:44,954 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:44,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 302 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-03 18:41:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2022-03-03 18:41:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2022-03-03 18:41:44,962 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2022-03-03 18:41:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:44,962 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2022-03-03 18:41:44,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-03-03 18:41:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2022-03-03 18:41:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:44,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:44,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:44,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-03 18:41:45,164 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,SelfDestructingSolverStorable99 [2022-03-03 18:41:45,164 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:45,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1338674603, now seen corresponding path program 87 times [2022-03-03 18:41:45,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:45,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157019180] [2022-03-03 18:41:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:45,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:45,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157019180] [2022-03-03 18:41:45,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157019180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:45,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084111395] [2022-03-03 18:41:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:45,263 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) [2022-03-03 18:41:45,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 18:41:45,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:41:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:45,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:45,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084111395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:45,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:45,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-03 18:41:45,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699439412] [2022-03-03 18:41:45,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:45,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:41:45,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:41:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:45,690 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:45,998 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2022-03-03 18:41:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:41:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:46,000 INFO L225 Difference]: With dead ends: 776 [2022-03-03 18:41:46,000 INFO L226 Difference]: Without dead ends: 759 [2022-03-03 18:41:46,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:46,000 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 95 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:46,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 432 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-03 18:41:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2022-03-03 18:41:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9409780775716694) internal successors, (1744), 593 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2022-03-03 18:41:46,008 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2022-03-03 18:41:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:46,008 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2022-03-03 18:41:46,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2022-03-03 18:41:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:46,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:46,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:46,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-03 18:41:46,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-03 18:41:46,209 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1341589969, now seen corresponding path program 88 times [2022-03-03 18:41:46,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:46,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370263986] [2022-03-03 18:41:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:46,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:46,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:46,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370263986] [2022-03-03 18:41:46,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370263986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:46,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680234331] [2022-03-03 18:41:46,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:46,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:46,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:46,310 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) [2022-03-03 18:41:46,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 18:41:46,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:46,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:46,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:46,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680234331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:46,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:46,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-03-03 18:41:46,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145629197] [2022-03-03 18:41:46,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:46,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:41:46,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:46,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:41:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:46,784 INFO L87 Difference]: Start difference. First operand 594 states and 1744 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:47,107 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2022-03-03 18:41:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:41:47,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:47,109 INFO L225 Difference]: With dead ends: 774 [2022-03-03 18:41:47,109 INFO L226 Difference]: Without dead ends: 756 [2022-03-03 18:41:47,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:41:47,110 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 128 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:47,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 391 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-03-03 18:41:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2022-03-03 18:41:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.922680412371134) internal successors, (1701), 582 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2022-03-03 18:41:47,120 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2022-03-03 18:41:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:47,120 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2022-03-03 18:41:47,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2022-03-03 18:41:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:47,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:47,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:47,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:47,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-03 18:41:47,345 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash 874083499, now seen corresponding path program 89 times [2022-03-03 18:41:47,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:47,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595833865] [2022-03-03 18:41:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:47,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:47,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:47,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595833865] [2022-03-03 18:41:47,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595833865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:47,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582967290] [2022-03-03 18:41:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:47,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:47,442 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) [2022-03-03 18:41:47,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 18:41:47,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:41:47,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:47,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:47,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:47,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:47,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582967290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:47,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:47,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 19 [2022-03-03 18:41:47,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582504239] [2022-03-03 18:41:47,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:47,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:41:47,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:41:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:47,840 INFO L87 Difference]: Start difference. First operand 583 states and 1701 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:48,132 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2022-03-03 18:41:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:41:48,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:48,134 INFO L225 Difference]: With dead ends: 744 [2022-03-03 18:41:48,134 INFO L226 Difference]: Without dead ends: 722 [2022-03-03 18:41:48,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:48,135 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 108 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:48,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 353 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-03 18:41:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2022-03-03 18:41:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9153713298791017) internal successors, (1688), 579 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2022-03-03 18:41:48,145 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2022-03-03 18:41:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:48,145 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2022-03-03 18:41:48,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2022-03-03 18:41:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:48,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:48,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:48,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-03 18:41:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:48,364 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 840484271, now seen corresponding path program 90 times [2022-03-03 18:41:48,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:48,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296528450] [2022-03-03 18:41:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:48,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:48,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296528450] [2022-03-03 18:41:48,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296528450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:48,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755933229] [2022-03-03 18:41:48,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:48,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:48,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:48,468 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) [2022-03-03 18:41:48,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 18:41:48,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:41:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:48,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:48,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755933229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:48,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:48,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 18:41:48,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436330234] [2022-03-03 18:41:48,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:48,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:41:48,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:41:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:48,861 INFO L87 Difference]: Start difference. First operand 580 states and 1688 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:49,137 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2022-03-03 18:41:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:41:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:49,139 INFO L225 Difference]: With dead ends: 695 [2022-03-03 18:41:49,139 INFO L226 Difference]: Without dead ends: 688 [2022-03-03 18:41:49,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:41:49,139 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:49,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 325 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-03 18:41:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2022-03-03 18:41:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.910499139414802) internal successors, (1691), 581 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:49,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2022-03-03 18:41:49,146 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2022-03-03 18:41:49,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:49,146 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2022-03-03 18:41:49,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2022-03-03 18:41:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:49,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:49,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:49,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:49,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-03 18:41:49,347 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1868116993, now seen corresponding path program 91 times [2022-03-03 18:41:49,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:49,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336386274] [2022-03-03 18:41:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:49,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:49,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336386274] [2022-03-03 18:41:49,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336386274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:49,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61980908] [2022-03-03 18:41:49,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:49,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:49,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:49,457 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) [2022-03-03 18:41:49,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 18:41:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:49,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:41:49,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:49,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61980908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:49,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:49,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 19 [2022-03-03 18:41:49,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295766109] [2022-03-03 18:41:49,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:49,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:41:49,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:41:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:49,895 INFO L87 Difference]: Start difference. First operand 582 states and 1691 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:50,102 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2022-03-03 18:41:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:41:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:50,104 INFO L225 Difference]: With dead ends: 647 [2022-03-03 18:41:50,104 INFO L226 Difference]: Without dead ends: 634 [2022-03-03 18:41:50,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:41:50,104 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:50,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 228 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-03-03 18:41:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2022-03-03 18:41:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.907986111111111) internal successors, (1675), 576 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2022-03-03 18:41:50,111 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2022-03-03 18:41:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:50,111 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2022-03-03 18:41:50,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2022-03-03 18:41:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:50,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:50,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:50,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-03 18:41:50,312 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,SelfDestructingSolverStorable104 [2022-03-03 18:41:50,312 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1940531815, now seen corresponding path program 92 times [2022-03-03 18:41:50,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:50,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437712044] [2022-03-03 18:41:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:50,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:50,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437712044] [2022-03-03 18:41:50,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437712044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:50,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163482471] [2022-03-03 18:41:50,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:50,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:50,411 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) [2022-03-03 18:41:50,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 18:41:50,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:50,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:50,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:50,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163482471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:50,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:50,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 18:41:50,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623870339] [2022-03-03 18:41:50,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:50,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:41:50,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:50,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:41:50,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:50,884 INFO L87 Difference]: Start difference. First operand 577 states and 1675 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:51,181 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2022-03-03 18:41:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:41:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:51,182 INFO L225 Difference]: With dead ends: 798 [2022-03-03 18:41:51,182 INFO L226 Difference]: Without dead ends: 781 [2022-03-03 18:41:51,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:51,183 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:51,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 449 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-03-03 18:41:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2022-03-03 18:41:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.9334389857369256) internal successors, (1851), 631 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2022-03-03 18:41:51,196 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2022-03-03 18:41:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:51,196 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2022-03-03 18:41:51,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2022-03-03 18:41:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:51,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:51,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:51,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:51,397 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,SelfDestructingSolverStorable105 [2022-03-03 18:41:51,397 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:51,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash -739732757, now seen corresponding path program 93 times [2022-03-03 18:41:51,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:51,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999488632] [2022-03-03 18:41:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:51,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:51,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999488632] [2022-03-03 18:41:51,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999488632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:51,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478367843] [2022-03-03 18:41:51,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:51,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:51,508 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) [2022-03-03 18:41:51,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 18:41:51,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:41:51,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:51,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:51,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:51,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:51,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478367843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:51,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:51,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 18:41:51,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939783548] [2022-03-03 18:41:51,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:51,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:41:51,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:41:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:51,913 INFO L87 Difference]: Start difference. First operand 632 states and 1851 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-03-03 18:41:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:52,174 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2022-03-03 18:41:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:41:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 19 [2022-03-03 18:41:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:52,176 INFO L225 Difference]: With dead ends: 796 [2022-03-03 18:41:52,176 INFO L226 Difference]: Without dead ends: 780 [2022-03-03 18:41:52,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:41:52,177 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 140 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:52,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 402 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-03-03 18:41:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2022-03-03 18:41:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.92258064516129) internal successors, (1812), 620 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2022-03-03 18:41:52,185 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2022-03-03 18:41:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:52,185 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2022-03-03 18:41:52,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-03-03 18:41:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2022-03-03 18:41:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:52,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:52,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:52,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-03 18:41:52,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-03 18:41:52,402 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1475940711, now seen corresponding path program 94 times [2022-03-03 18:41:52,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:52,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387676881] [2022-03-03 18:41:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:52,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:52,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:52,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387676881] [2022-03-03 18:41:52,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387676881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:52,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146269471] [2022-03-03 18:41:52,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:52,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:52,508 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) [2022-03-03 18:41:52,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 18:41:52,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:52,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:52,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146269471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:52,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:52,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 18:41:52,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044362182] [2022-03-03 18:41:52,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:52,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:41:52,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:41:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:52,925 INFO L87 Difference]: Start difference. First operand 621 states and 1812 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:53,233 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2022-03-03 18:41:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:41:53,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:53,234 INFO L225 Difference]: With dead ends: 809 [2022-03-03 18:41:53,234 INFO L226 Difference]: Without dead ends: 791 [2022-03-03 18:41:53,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:53,235 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 98 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:53,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 427 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-03 18:41:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2022-03-03 18:41:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2022-03-03 18:41:53,242 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2022-03-03 18:41:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:53,242 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2022-03-03 18:41:53,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2022-03-03 18:41:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:53,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:53,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:53,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-03 18:41:53,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:53,444 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1442341483, now seen corresponding path program 95 times [2022-03-03 18:41:53,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:53,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636581988] [2022-03-03 18:41:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:53,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:53,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636581988] [2022-03-03 18:41:53,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636581988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:53,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818268591] [2022-03-03 18:41:53,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:53,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:53,553 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) [2022-03-03 18:41:53,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 18:41:53,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:53,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:53,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:53,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:53,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818268591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:53,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:53,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-03 18:41:53,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295879267] [2022-03-03 18:41:53,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:53,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:41:53,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:41:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:41:53,946 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:54,270 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2022-03-03 18:41:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:41:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:54,271 INFO L225 Difference]: With dead ends: 764 [2022-03-03 18:41:54,271 INFO L226 Difference]: Without dead ends: 744 [2022-03-03 18:41:54,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:41:54,272 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 103 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:54,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 369 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-03 18:41:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2022-03-03 18:41:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.9141914191419143) internal successors, (1766), 606 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2022-03-03 18:41:54,279 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2022-03-03 18:41:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:54,279 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2022-03-03 18:41:54,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2022-03-03 18:41:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:54,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:54,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:54,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-03 18:41:54,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:54,480 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:54,481 INFO L85 PathProgramCache]: Analyzing trace with hash 400765415, now seen corresponding path program 96 times [2022-03-03 18:41:54,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:54,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590530347] [2022-03-03 18:41:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:54,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:54,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:54,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590530347] [2022-03-03 18:41:54,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590530347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:54,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250768868] [2022-03-03 18:41:54,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:41:54,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:54,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:54,589 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) [2022-03-03 18:41:54,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 18:41:54,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:41:54,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:54,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:54,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:55,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250768868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:55,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:55,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 18:41:55,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291540806] [2022-03-03 18:41:55,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:55,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:41:55,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:55,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:41:55,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:41:55,002 INFO L87 Difference]: Start difference. First operand 607 states and 1766 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:55,313 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2022-03-03 18:41:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:41:55,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:55,315 INFO L225 Difference]: With dead ends: 713 [2022-03-03 18:41:55,315 INFO L226 Difference]: Without dead ends: 706 [2022-03-03 18:41:55,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:41:55,315 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:55,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 388 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-03 18:41:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2022-03-03 18:41:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8957654723127035) internal successors, (1778), 614 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2022-03-03 18:41:55,322 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2022-03-03 18:41:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2022-03-03 18:41:55,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2022-03-03 18:41:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:55,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:55,323 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:55,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:55,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:55,524 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1510649617, now seen corresponding path program 97 times [2022-03-03 18:41:55,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:55,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565982351] [2022-03-03 18:41:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:55,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:55,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565982351] [2022-03-03 18:41:55,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565982351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:55,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895948067] [2022-03-03 18:41:55,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:41:55,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:55,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:55,616 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) [2022-03-03 18:41:55,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 18:41:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:55,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:55,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:55,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:56,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895948067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:56,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:56,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 20 [2022-03-03 18:41:56,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788915685] [2022-03-03 18:41:56,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:56,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:41:56,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:41:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:56,013 INFO L87 Difference]: Start difference. First operand 615 states and 1778 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:56,207 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2022-03-03 18:41:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:41:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:56,208 INFO L225 Difference]: With dead ends: 753 [2022-03-03 18:41:56,208 INFO L226 Difference]: Without dead ends: 743 [2022-03-03 18:41:56,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:56,208 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:56,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 272 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:41:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-03-03 18:41:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2022-03-03 18:41:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.905750798722045) internal successors, (1819), 626 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2022-03-03 18:41:56,216 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2022-03-03 18:41:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:56,216 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2022-03-03 18:41:56,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2022-03-03 18:41:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:56,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:56,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:56,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-03 18:41:56,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:56,417 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash 104053107, now seen corresponding path program 98 times [2022-03-03 18:41:56,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:56,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214565447] [2022-03-03 18:41:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:56,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:56,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214565447] [2022-03-03 18:41:56,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214565447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:56,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564988288] [2022-03-03 18:41:56,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:41:56,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:56,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:56,519 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) [2022-03-03 18:41:56,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 18:41:56,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:41:56,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:56,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:56,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:56,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564988288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:56,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:56,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2022-03-03 18:41:56,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235357159] [2022-03-03 18:41:56,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:56,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:41:56,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:41:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:56,931 INFO L87 Difference]: Start difference. First operand 627 states and 1819 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:57,135 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2022-03-03 18:41:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:41:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:57,136 INFO L225 Difference]: With dead ends: 735 [2022-03-03 18:41:57,136 INFO L226 Difference]: Without dead ends: 728 [2022-03-03 18:41:57,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:57,137 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 120 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:57,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 293 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-03-03 18:41:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2022-03-03 18:41:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.90224358974359) internal successors, (1811), 624 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2022-03-03 18:41:57,147 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2022-03-03 18:41:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:57,147 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2022-03-03 18:41:57,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2022-03-03 18:41:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:57,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:57,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:57,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-03 18:41:57,371 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,SelfDestructingSolverStorable111 [2022-03-03 18:41:57,371 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash -939194811, now seen corresponding path program 99 times [2022-03-03 18:41:57,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:57,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618507649] [2022-03-03 18:41:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:57,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:57,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:57,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618507649] [2022-03-03 18:41:57,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618507649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:57,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376951985] [2022-03-03 18:41:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:41:57,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:57,480 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) [2022-03-03 18:41:57,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 18:41:57,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:41:57,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:57,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:57,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376951985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:57,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:57,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 19 [2022-03-03 18:41:57,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914153767] [2022-03-03 18:41:57,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:57,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:41:57,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:41:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:41:57,998 INFO L87 Difference]: Start difference. First operand 625 states and 1811 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:58,214 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2022-03-03 18:41:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:41:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:58,215 INFO L225 Difference]: With dead ends: 709 [2022-03-03 18:41:58,215 INFO L226 Difference]: Without dead ends: 702 [2022-03-03 18:41:58,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:41:58,216 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:58,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 312 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-03 18:41:58,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2022-03-03 18:41:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.9020866773675764) internal successors, (1808), 623 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2022-03-03 18:41:58,223 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2022-03-03 18:41:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:58,223 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2022-03-03 18:41:58,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2022-03-03 18:41:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:58,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:58,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:58,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-03 18:41:58,424 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,SelfDestructingSolverStorable112 [2022-03-03 18:41:58,424 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1123091609, now seen corresponding path program 100 times [2022-03-03 18:41:58,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:58,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287979189] [2022-03-03 18:41:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:58,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:58,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:58,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287979189] [2022-03-03 18:41:58,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287979189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:58,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834476942] [2022-03-03 18:41:58,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:41:58,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:58,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:58,515 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) [2022-03-03 18:41:58,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 18:41:58,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:41:58,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:58,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:58,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:58,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834476942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:58,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:58,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-03 18:41:58,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411747411] [2022-03-03 18:41:58,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:58,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:41:58,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:41:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:41:58,917 INFO L87 Difference]: Start difference. First operand 624 states and 1808 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:41:59,152 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2022-03-03 18:41:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:41:59,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:41:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:41:59,154 INFO L225 Difference]: With dead ends: 809 [2022-03-03 18:41:59,154 INFO L226 Difference]: Without dead ends: 799 [2022-03-03 18:41:59,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:41:59,154 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:41:59,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 368 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:41:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-03 18:41:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2022-03-03 18:41:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9175738724727838) internal successors, (1876), 643 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2022-03-03 18:41:59,162 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2022-03-03 18:41:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:41:59,162 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2022-03-03 18:41:59,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:41:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2022-03-03 18:41:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:41:59,163 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:41:59,163 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:41:59,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-03 18:41:59,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-03 18:41:59,364 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:41:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:41:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 491611115, now seen corresponding path program 101 times [2022-03-03 18:41:59,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:41:59,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452499433] [2022-03-03 18:41:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:41:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:41:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:41:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:59,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:41:59,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452499433] [2022-03-03 18:41:59,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452499433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:41:59,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402909823] [2022-03-03 18:41:59,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:41:59,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:41:59,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:41:59,464 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) [2022-03-03 18:41:59,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 18:41:59,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:41:59,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:41:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:41:59,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:41:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:59,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:41:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:41:59,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402909823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:41:59,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:41:59,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-03-03 18:41:59,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343725848] [2022-03-03 18:41:59,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:41:59,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:41:59,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:41:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:41:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:41:59,860 INFO L87 Difference]: Start difference. First operand 644 states and 1876 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:00,139 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2022-03-03 18:42:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:42:00,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:42:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:00,140 INFO L225 Difference]: With dead ends: 793 [2022-03-03 18:42:00,141 INFO L226 Difference]: Without dead ends: 786 [2022-03-03 18:42:00,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:42:00,141 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:00,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 454 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-03 18:42:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2022-03-03 18:42:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2022-03-03 18:42:00,148 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2022-03-03 18:42:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:00,148 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2022-03-03 18:42:00,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2022-03-03 18:42:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:42:00,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:00,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:00,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-03 18:42:00,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-03 18:42:00,350 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash -551636803, now seen corresponding path program 102 times [2022-03-03 18:42:00,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:00,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763054884] [2022-03-03 18:42:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:00,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:00,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:00,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763054884] [2022-03-03 18:42:00,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763054884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:00,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260904045] [2022-03-03 18:42:00,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:00,447 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) [2022-03-03 18:42:00,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 18:42:00,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:42:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:42:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:00,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:00,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260904045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:00,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:00,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 19 [2022-03-03 18:42:00,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910541509] [2022-03-03 18:42:00,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:00,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:42:00,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:42:00,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:42:00,844 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:01,104 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2022-03-03 18:42:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:42:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:42:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:01,107 INFO L225 Difference]: With dead ends: 788 [2022-03-03 18:42:01,107 INFO L226 Difference]: Without dead ends: 775 [2022-03-03 18:42:01,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:42:01,107 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:01,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 353 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-03 18:42:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2022-03-03 18:42:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9089481946624804) internal successors, (1853), 637 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2022-03-03 18:42:01,118 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2022-03-03 18:42:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:01,118 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2022-03-03 18:42:01,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2022-03-03 18:42:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 18:42:01,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:01,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:01,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:01,335 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,SelfDestructingSolverStorable115 [2022-03-03 18:42:01,335 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash -16407001, now seen corresponding path program 103 times [2022-03-03 18:42:01,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:01,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394826319] [2022-03-03 18:42:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:01,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:01,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:01,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394826319] [2022-03-03 18:42:01,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394826319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:01,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261012268] [2022-03-03 18:42:01,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:01,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:01,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:01,438 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) [2022-03-03 18:42:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-03 18:42:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 18:42:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:01,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:01,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261012268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:01,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:01,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 18:42:01,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070973750] [2022-03-03 18:42:01,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:01,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:42:01,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:42:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:42:01,828 INFO L87 Difference]: Start difference. First operand 638 states and 1853 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:02,065 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2022-03-03 18:42:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:42:02,065 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 18:42:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:02,066 INFO L225 Difference]: With dead ends: 748 [2022-03-03 18:42:02,066 INFO L226 Difference]: Without dead ends: 741 [2022-03-03 18:42:02,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:42:02,066 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:02,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 300 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-03 18:42:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2022-03-03 18:42:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.9086614173228345) internal successors, (1847), 635 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2022-03-03 18:42:02,073 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2022-03-03 18:42:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:02,074 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2022-03-03 18:42:02,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2022-03-03 18:42:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:02,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:02,074 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:02,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-03 18:42:02,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-03 18:42:02,275 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1231124503, now seen corresponding path program 104 times [2022-03-03 18:42:02,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:02,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481175862] [2022-03-03 18:42:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:02,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:02,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:02,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481175862] [2022-03-03 18:42:02,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481175862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:02,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759194563] [2022-03-03 18:42:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:02,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:02,333 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) [2022-03-03 18:42:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-03 18:42:02,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:02,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:02,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:02,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759194563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:02,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:02,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-03 18:42:02,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042139367] [2022-03-03 18:42:02,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:02,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:42:02,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:42:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:42:02,458 INFO L87 Difference]: Start difference. First operand 636 states and 1847 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:02,583 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2022-03-03 18:42:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:42:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:02,584 INFO L225 Difference]: With dead ends: 972 [2022-03-03 18:42:02,584 INFO L226 Difference]: Without dead ends: 955 [2022-03-03 18:42:02,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:42:02,585 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:02,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 109 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-03-03 18:42:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2022-03-03 18:42:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.9158730158730157) internal successors, (1837), 630 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2022-03-03 18:42:02,593 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2022-03-03 18:42:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:02,593 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2022-03-03 18:42:02,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2022-03-03 18:42:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:02,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:02,594 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:02,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:02,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:02,806 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1715049991, now seen corresponding path program 105 times [2022-03-03 18:42:02,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:02,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718322880] [2022-03-03 18:42:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:02,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:02,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:02,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718322880] [2022-03-03 18:42:02,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718322880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:02,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074769232] [2022-03-03 18:42:02,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:02,854 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) [2022-03-03 18:42:02,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-03 18:42:02,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:42:02,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:02,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:02,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:02,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074769232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:02,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:02,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-03 18:42:02,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676243002] [2022-03-03 18:42:02,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:02,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:42:02,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:42:02,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:42:02,971 INFO L87 Difference]: Start difference. First operand 631 states and 1837 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:03,061 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2022-03-03 18:42:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:42:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:03,063 INFO L225 Difference]: With dead ends: 996 [2022-03-03 18:42:03,063 INFO L226 Difference]: Without dead ends: 996 [2022-03-03 18:42:03,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:42:03,063 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:03,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 68 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-03-03 18:42:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2022-03-03 18:42:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.9183359013867487) internal successors, (1894), 649 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2022-03-03 18:42:03,071 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2022-03-03 18:42:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:03,071 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2022-03-03 18:42:03,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2022-03-03 18:42:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:03,072 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:03,072 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:03,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-03 18:42:03,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:03,274 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash -77943029, now seen corresponding path program 106 times [2022-03-03 18:42:03,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:03,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836104386] [2022-03-03 18:42:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:03,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:03,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:03,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836104386] [2022-03-03 18:42:03,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836104386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:03,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909353751] [2022-03-03 18:42:03,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:03,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:03,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:03,325 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) [2022-03-03 18:42:03,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-03 18:42:03,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:03,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:03,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:03,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909353751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:03,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:03,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:03,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220255723] [2022-03-03 18:42:03,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:03,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:03,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:03,464 INFO L87 Difference]: Start difference. First operand 650 states and 1894 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:03,759 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2022-03-03 18:42:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 18:42:03,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:03,761 INFO L225 Difference]: With dead ends: 1332 [2022-03-03 18:42:03,761 INFO L226 Difference]: Without dead ends: 1326 [2022-03-03 18:42:03,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:42:03,762 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:03,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-03-03 18:42:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2022-03-03 18:42:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.0063613231552164) internal successors, (2363), 786 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2022-03-03 18:42:03,773 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2022-03-03 18:42:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:03,773 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2022-03-03 18:42:03,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2022-03-03 18:42:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:03,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:03,774 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:03,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-03 18:42:03,974 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,SelfDestructingSolverStorable119 [2022-03-03 18:42:03,974 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash 493511777, now seen corresponding path program 107 times [2022-03-03 18:42:03,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:03,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745423062] [2022-03-03 18:42:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:03,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:04,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:04,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745423062] [2022-03-03 18:42:04,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745423062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:04,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898940040] [2022-03-03 18:42:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:04,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:04,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:04,021 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) [2022-03-03 18:42:04,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-03 18:42:04,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:42:04,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:04,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:04,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:04,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:04,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898940040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:04,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:04,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:04,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101207688] [2022-03-03 18:42:04,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:04,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:04,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:04,150 INFO L87 Difference]: Start difference. First operand 787 states and 2363 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:04,534 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2022-03-03 18:42:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:42:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:04,537 INFO L225 Difference]: With dead ends: 1321 [2022-03-03 18:42:04,537 INFO L226 Difference]: Without dead ends: 1315 [2022-03-03 18:42:04,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 18:42:04,537 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:04,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 183 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-03-03 18:42:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2022-03-03 18:42:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.9464285714285716) internal successors, (2145), 728 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2022-03-03 18:42:04,548 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2022-03-03 18:42:04,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:04,548 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2022-03-03 18:42:04,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2022-03-03 18:42:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:04,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:04,549 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:04,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-03 18:42:04,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:04,749 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1438059769, now seen corresponding path program 108 times [2022-03-03 18:42:04,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:04,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340534403] [2022-03-03 18:42:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:04,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:04,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:04,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340534403] [2022-03-03 18:42:04,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340534403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:04,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746218851] [2022-03-03 18:42:04,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:04,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:04,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:04,800 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) [2022-03-03 18:42:04,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-03 18:42:04,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:42:04,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:04,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:04,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:04,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746218851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:04,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:04,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:04,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221654833] [2022-03-03 18:42:04,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:04,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:04,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:04,930 INFO L87 Difference]: Start difference. First operand 729 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:05,278 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2022-03-03 18:42:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 18:42:05,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:05,280 INFO L225 Difference]: With dead ends: 1177 [2022-03-03 18:42:05,280 INFO L226 Difference]: Without dead ends: 1177 [2022-03-03 18:42:05,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:42:05,280 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:05,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 130 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-03-03 18:42:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2022-03-03 18:42:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.971279373368146) internal successors, (2276), 766 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2022-03-03 18:42:05,291 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2022-03-03 18:42:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:05,291 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2022-03-03 18:42:05,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2022-03-03 18:42:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:05,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:05,292 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:05,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-03 18:42:05,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:05,493 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1902650873, now seen corresponding path program 109 times [2022-03-03 18:42:05,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:05,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225196060] [2022-03-03 18:42:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:05,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:05,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225196060] [2022-03-03 18:42:05,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225196060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:05,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392398467] [2022-03-03 18:42:05,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:05,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:05,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:05,540 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) [2022-03-03 18:42:05,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-03 18:42:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:05,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:05,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392398467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:05,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:05,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:05,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431239870] [2022-03-03 18:42:05,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:05,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:05,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:05,685 INFO L87 Difference]: Start difference. First operand 767 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:06,081 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2022-03-03 18:42:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:42:06,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:06,083 INFO L225 Difference]: With dead ends: 1009 [2022-03-03 18:42:06,083 INFO L226 Difference]: Without dead ends: 1005 [2022-03-03 18:42:06,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 18:42:06,083 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:06,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 135 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-03-03 18:42:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2022-03-03 18:42:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9283667621776504) internal successors, (2044), 698 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2022-03-03 18:42:06,092 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2022-03-03 18:42:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:06,092 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2022-03-03 18:42:06,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2022-03-03 18:42:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:06,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:06,093 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:06,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-03 18:42:06,293 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,SelfDestructingSolverStorable122 [2022-03-03 18:42:06,294 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1028741579, now seen corresponding path program 110 times [2022-03-03 18:42:06,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:06,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283822062] [2022-03-03 18:42:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:06,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:06,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:06,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283822062] [2022-03-03 18:42:06,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283822062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:06,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688127172] [2022-03-03 18:42:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:06,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:06,340 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) [2022-03-03 18:42:06,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-03 18:42:06,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:06,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:06,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:06,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688127172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:06,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:06,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:06,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147343918] [2022-03-03 18:42:06,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:06,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:06,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:06,467 INFO L87 Difference]: Start difference. First operand 699 states and 2044 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:06,802 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2022-03-03 18:42:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:42:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:06,804 INFO L225 Difference]: With dead ends: 1249 [2022-03-03 18:42:06,805 INFO L226 Difference]: Without dead ends: 1240 [2022-03-03 18:42:06,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 18:42:06,805 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:06,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 125 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-03-03 18:42:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2022-03-03 18:42:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.936376210235131) internal successors, (2123), 723 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2022-03-03 18:42:06,815 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2022-03-03 18:42:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:06,815 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2022-03-03 18:42:06,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2022-03-03 18:42:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:06,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:06,816 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:06,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-03 18:42:07,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:07,017 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:07,017 INFO L85 PathProgramCache]: Analyzing trace with hash 440996257, now seen corresponding path program 111 times [2022-03-03 18:42:07,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:07,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213207862] [2022-03-03 18:42:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:07,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:07,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213207862] [2022-03-03 18:42:07,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213207862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:07,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621601533] [2022-03-03 18:42:07,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:07,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:07,074 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) [2022-03-03 18:42:07,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-03 18:42:07,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:42:07,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:07,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:07,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:07,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:07,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621601533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:07,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:07,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:07,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392577237] [2022-03-03 18:42:07,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:07,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:07,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:07,214 INFO L87 Difference]: Start difference. First operand 724 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:07,526 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2022-03-03 18:42:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 18:42:07,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:07,528 INFO L225 Difference]: With dead ends: 1262 [2022-03-03 18:42:07,528 INFO L226 Difference]: Without dead ends: 1250 [2022-03-03 18:42:07,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:42:07,528 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 186 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:07,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 122 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-03-03 18:42:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2022-03-03 18:42:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.9263301500682126) internal successors, (2145), 733 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2022-03-03 18:42:07,538 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2022-03-03 18:42:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:07,539 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2022-03-03 18:42:07,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2022-03-03 18:42:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:07,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:07,540 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:07,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-03 18:42:07,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-03 18:42:07,740 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:07,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -599239541, now seen corresponding path program 112 times [2022-03-03 18:42:07,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:07,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908943974] [2022-03-03 18:42:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:07,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:07,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:07,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908943974] [2022-03-03 18:42:07,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908943974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:07,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421920476] [2022-03-03 18:42:07,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:07,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:07,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:07,787 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) [2022-03-03 18:42:07,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-03 18:42:07,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:07,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:07,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:07,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421920476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:07,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:07,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:07,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504707090] [2022-03-03 18:42:07,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:07,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:07,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:07,914 INFO L87 Difference]: Start difference. First operand 734 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:08,138 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2022-03-03 18:42:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:42:08,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:08,140 INFO L225 Difference]: With dead ends: 1109 [2022-03-03 18:42:08,140 INFO L226 Difference]: Without dead ends: 1097 [2022-03-03 18:42:08,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:42:08,141 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:08,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 117 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-03-03 18:42:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2022-03-03 18:42:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.922237380627558) internal successors, (2142), 733 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2022-03-03 18:42:08,150 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2022-03-03 18:42:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:08,151 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2022-03-03 18:42:08,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2022-03-03 18:42:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:08,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:08,152 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:08,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-03 18:42:08,367 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,SelfDestructingSolverStorable125 [2022-03-03 18:42:08,367 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:08,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2045038283, now seen corresponding path program 113 times [2022-03-03 18:42:08,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:08,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372458629] [2022-03-03 18:42:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:08,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:08,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372458629] [2022-03-03 18:42:08,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372458629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:08,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020060470] [2022-03-03 18:42:08,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:08,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:08,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:08,409 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) [2022-03-03 18:42:08,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-03 18:42:08,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:42:08,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:08,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:08,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:08,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020060470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:08,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:08,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-03 18:42:08,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284281743] [2022-03-03 18:42:08,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:08,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:08,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:08,549 INFO L87 Difference]: Start difference. First operand 734 states and 2142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:08,885 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2022-03-03 18:42:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 18:42:08,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:08,887 INFO L225 Difference]: With dead ends: 1207 [2022-03-03 18:42:08,887 INFO L226 Difference]: Without dead ends: 1201 [2022-03-03 18:42:08,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:42:08,887 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:08,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 143 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-03-03 18:42:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2022-03-03 18:42:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.9479034307496823) internal successors, (2320), 787 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2022-03-03 18:42:08,904 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2022-03-03 18:42:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2022-03-03 18:42:08,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2022-03-03 18:42:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:08,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:08,906 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:08,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-03 18:42:09,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:09,107 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1580447179, now seen corresponding path program 114 times [2022-03-03 18:42:09,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:09,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587581301] [2022-03-03 18:42:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:09,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:09,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:09,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587581301] [2022-03-03 18:42:09,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587581301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:09,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235671676] [2022-03-03 18:42:09,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:09,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:09,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:09,161 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) [2022-03-03 18:42:09,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-03 18:42:09,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:42:09,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:09,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:09,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235671676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:09,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:09,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-03 18:42:09,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305141076] [2022-03-03 18:42:09,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:09,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:09,317 INFO L87 Difference]: Start difference. First operand 788 states and 2320 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:09,698 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2022-03-03 18:42:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:42:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:09,700 INFO L225 Difference]: With dead ends: 1081 [2022-03-03 18:42:09,700 INFO L226 Difference]: Without dead ends: 1075 [2022-03-03 18:42:09,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 18:42:09,701 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:09,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 127 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-03-03 18:42:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2022-03-03 18:42:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.9117241379310346) internal successors, (2111), 725 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2022-03-03 18:42:09,712 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2022-03-03 18:42:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:09,712 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2022-03-03 18:42:09,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2022-03-03 18:42:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:09,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:09,713 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:09,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-03 18:42:09,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:09,915 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:09,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1546847951, now seen corresponding path program 115 times [2022-03-03 18:42:09,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:09,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155861289] [2022-03-03 18:42:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:09,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:09,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:09,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155861289] [2022-03-03 18:42:09,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155861289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:09,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906759453] [2022-03-03 18:42:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:09,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:09,960 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) [2022-03-03 18:42:09,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-03 18:42:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:10,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:10,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906759453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:10,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:10,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-03 18:42:10,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019539060] [2022-03-03 18:42:10,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:10,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:10,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:10,104 INFO L87 Difference]: Start difference. First operand 726 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:10,479 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2022-03-03 18:42:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:42:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:10,481 INFO L225 Difference]: With dead ends: 974 [2022-03-03 18:42:10,481 INFO L226 Difference]: Without dead ends: 966 [2022-03-03 18:42:10,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 18:42:10,481 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:10,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 127 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-03-03 18:42:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2022-03-03 18:42:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.917119565217391) internal successors, (2147), 736 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2022-03-03 18:42:10,497 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2022-03-03 18:42:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:10,497 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2022-03-03 18:42:10,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2022-03-03 18:42:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:10,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:10,499 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:10,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-03 18:42:10,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-03 18:42:10,699 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1648071801, now seen corresponding path program 116 times [2022-03-03 18:42:10,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:10,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370931110] [2022-03-03 18:42:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:10,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:10,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:10,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370931110] [2022-03-03 18:42:10,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370931110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:10,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557372085] [2022-03-03 18:42:10,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:10,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:10,736 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) [2022-03-03 18:42:10,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-03 18:42:10,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:10,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:10,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:10,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:10,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557372085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:10,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:10,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-03 18:42:10,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347441013] [2022-03-03 18:42:10,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:10,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:10,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:10,880 INFO L87 Difference]: Start difference. First operand 737 states and 2147 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:11,204 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2022-03-03 18:42:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 18:42:11,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:11,206 INFO L225 Difference]: With dead ends: 1269 [2022-03-03 18:42:11,206 INFO L226 Difference]: Without dead ends: 1260 [2022-03-03 18:42:11,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:42:11,207 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 172 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:11,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 118 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-03 18:42:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2022-03-03 18:42:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.9404617253948966) internal successors, (2420), 823 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2022-03-03 18:42:11,218 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2022-03-03 18:42:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:11,218 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2022-03-03 18:42:11,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2022-03-03 18:42:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:11,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:11,219 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:11,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-03 18:42:11,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-03 18:42:11,420 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2112662905, now seen corresponding path program 117 times [2022-03-03 18:42:11,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:11,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555242887] [2022-03-03 18:42:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:11,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:11,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:11,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555242887] [2022-03-03 18:42:11,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555242887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:11,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187885331] [2022-03-03 18:42:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:11,467 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) [2022-03-03 18:42:11,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-03 18:42:11,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:42:11,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:11,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:11,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:11,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:11,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187885331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:11,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:11,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-03 18:42:11,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907777969] [2022-03-03 18:42:11,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:11,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:11,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:11,605 INFO L87 Difference]: Start difference. First operand 824 states and 2420 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:12,047 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2022-03-03 18:42:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 18:42:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:12,049 INFO L225 Difference]: With dead ends: 1150 [2022-03-03 18:42:12,049 INFO L226 Difference]: Without dead ends: 1144 [2022-03-03 18:42:12,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:42:12,050 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:12,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 146 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-03-03 18:42:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2022-03-03 18:42:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.9168765743073046) internal successors, (2316), 794 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2022-03-03 18:42:12,067 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2022-03-03 18:42:12,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:12,067 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2022-03-03 18:42:12,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2022-03-03 18:42:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:12,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:12,068 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:12,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-03 18:42:12,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:12,269 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2146262133, now seen corresponding path program 118 times [2022-03-03 18:42:12,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:12,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881274595] [2022-03-03 18:42:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:12,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:12,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881274595] [2022-03-03 18:42:12,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881274595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:12,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091093139] [2022-03-03 18:42:12,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:12,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:12,322 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) [2022-03-03 18:42:12,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-03 18:42:12,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:12,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:12,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:12,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:12,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091093139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:12,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:12,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-03-03 18:42:12,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192073274] [2022-03-03 18:42:12,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:12,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:12,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:12,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:12,470 INFO L87 Difference]: Start difference. First operand 795 states and 2316 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:12,878 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2022-03-03 18:42:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:42:12,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:12,880 INFO L225 Difference]: With dead ends: 1155 [2022-03-03 18:42:12,880 INFO L226 Difference]: Without dead ends: 1147 [2022-03-03 18:42:12,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:42:12,880 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:12,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 147 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-03-03 18:42:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2022-03-03 18:42:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.9289340101522843) internal successors, (2308), 788 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2022-03-03 18:42:12,890 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2022-03-03 18:42:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:12,891 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2022-03-03 18:42:12,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2022-03-03 18:42:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:12,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:12,892 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:12,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-03 18:42:13,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:13,092 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:13,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1107129095, now seen corresponding path program 119 times [2022-03-03 18:42:13,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:13,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116493850] [2022-03-03 18:42:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:13,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:13,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:13,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116493850] [2022-03-03 18:42:13,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116493850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:13,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524505164] [2022-03-03 18:42:13,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:13,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:13,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:13,139 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) [2022-03-03 18:42:13,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-03 18:42:13,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:42:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:13,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:13,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524505164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:13,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:13,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-03 18:42:13,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019170512] [2022-03-03 18:42:13,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:13,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:42:13,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:42:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:42:13,293 INFO L87 Difference]: Start difference. First operand 789 states and 2308 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:13,673 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2022-03-03 18:42:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 18:42:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:13,675 INFO L225 Difference]: With dead ends: 1081 [2022-03-03 18:42:13,675 INFO L226 Difference]: Without dead ends: 1069 [2022-03-03 18:42:13,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:42:13,676 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:13,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 129 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-03-03 18:42:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2022-03-03 18:42:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.9294554455445545) internal successors, (2367), 808 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2022-03-03 18:42:13,691 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2022-03-03 18:42:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:13,691 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2022-03-03 18:42:13,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2022-03-03 18:42:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:13,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:13,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:13,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-03 18:42:13,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:13,893 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash -170367413, now seen corresponding path program 120 times [2022-03-03 18:42:13,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:13,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422861290] [2022-03-03 18:42:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:13,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:13,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422861290] [2022-03-03 18:42:13,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422861290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:13,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077951646] [2022-03-03 18:42:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:13,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:13,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:13,931 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) [2022-03-03 18:42:13,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-03 18:42:13,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:42:13,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:14,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:14,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077951646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:14,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:14,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-03-03 18:42:14,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528693751] [2022-03-03 18:42:14,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:14,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:14,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:14,112 INFO L87 Difference]: Start difference. First operand 809 states and 2367 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:14,433 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2022-03-03 18:42:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 18:42:14,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:14,436 INFO L225 Difference]: With dead ends: 1520 [2022-03-03 18:42:14,436 INFO L226 Difference]: Without dead ends: 1514 [2022-03-03 18:42:14,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:42:14,436 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:14,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 156 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-03-03 18:42:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2022-03-03 18:42:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.9898785425101213) internal successors, (2954), 988 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2022-03-03 18:42:14,450 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2022-03-03 18:42:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:14,450 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2022-03-03 18:42:14,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2022-03-03 18:42:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:14,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:14,451 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:14,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-03 18:42:14,652 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,SelfDestructingSolverStorable133 [2022-03-03 18:42:14,652 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash -634958517, now seen corresponding path program 121 times [2022-03-03 18:42:14,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:14,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143023012] [2022-03-03 18:42:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:14,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:14,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:14,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143023012] [2022-03-03 18:42:14,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143023012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:14,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828812345] [2022-03-03 18:42:14,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:14,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:14,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:14,691 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) [2022-03-03 18:42:14,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-03 18:42:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:14,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:14,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:14,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:14,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828812345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:14,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:14,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-03-03 18:42:14,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136709893] [2022-03-03 18:42:14,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:14,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:14,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:14,839 INFO L87 Difference]: Start difference. First operand 989 states and 2954 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:15,348 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2022-03-03 18:42:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:42:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:15,350 INFO L225 Difference]: With dead ends: 1383 [2022-03-03 18:42:15,351 INFO L226 Difference]: Without dead ends: 1379 [2022-03-03 18:42:15,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 18:42:15,351 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 174 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:15,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 116 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-03-03 18:42:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2022-03-03 18:42:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.966492146596859) internal successors, (2833), 955 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2022-03-03 18:42:15,364 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2022-03-03 18:42:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:15,364 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2022-03-03 18:42:15,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2022-03-03 18:42:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:15,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:15,365 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:15,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-03 18:42:15,566 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,SelfDestructingSolverStorable134 [2022-03-03 18:42:15,566 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash -668557745, now seen corresponding path program 122 times [2022-03-03 18:42:15,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:15,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122065533] [2022-03-03 18:42:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:15,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:15,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122065533] [2022-03-03 18:42:15,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122065533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:15,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31894364] [2022-03-03 18:42:15,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:15,604 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) [2022-03-03 18:42:15,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-03 18:42:15,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:15,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:15,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:15,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31894364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:15,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:15,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-03-03 18:42:15,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62725899] [2022-03-03 18:42:15,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:15,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:15,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:15,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:15,750 INFO L87 Difference]: Start difference. First operand 956 states and 2833 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:16,203 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2022-03-03 18:42:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 18:42:16,204 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:16,206 INFO L225 Difference]: With dead ends: 1412 [2022-03-03 18:42:16,206 INFO L226 Difference]: Without dead ends: 1404 [2022-03-03 18:42:16,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 18:42:16,206 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 159 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:16,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 138 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-03 18:42:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2022-03-03 18:42:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9980449657869013) internal successors, (3067), 1023 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2022-03-03 18:42:16,220 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2022-03-03 18:42:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:16,220 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2022-03-03 18:42:16,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2022-03-03 18:42:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:16,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:16,222 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:16,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-03 18:42:16,422 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,SelfDestructingSolverStorable135 [2022-03-03 18:42:16,422 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1710133813, now seen corresponding path program 123 times [2022-03-03 18:42:16,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:16,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060210494] [2022-03-03 18:42:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:16,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:16,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:16,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060210494] [2022-03-03 18:42:16,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060210494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:16,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490958993] [2022-03-03 18:42:16,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:16,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:16,465 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) [2022-03-03 18:42:16,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-03 18:42:16,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:42:16,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:16,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:16,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:16,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490958993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:16,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:16,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-03 18:42:16,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564463591] [2022-03-03 18:42:16,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:16,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:42:16,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:42:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:42:16,632 INFO L87 Difference]: Start difference. First operand 1024 states and 3067 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:17,153 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2022-03-03 18:42:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:42:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:17,156 INFO L225 Difference]: With dead ends: 1501 [2022-03-03 18:42:17,157 INFO L226 Difference]: Without dead ends: 1489 [2022-03-03 18:42:17,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:42:17,157 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 162 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:17,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 118 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-03-03 18:42:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2022-03-03 18:42:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.027902790279028) internal successors, (3364), 1111 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2022-03-03 18:42:17,177 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2022-03-03 18:42:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:17,177 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2022-03-03 18:42:17,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2022-03-03 18:42:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:17,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:17,179 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:17,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:17,391 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,SelfDestructingSolverStorable136 [2022-03-03 18:42:17,391 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:17,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 360746447, now seen corresponding path program 124 times [2022-03-03 18:42:17,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:17,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465069406] [2022-03-03 18:42:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:17,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:17,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465069406] [2022-03-03 18:42:17,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465069406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:17,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73477738] [2022-03-03 18:42:17,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:17,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:17,440 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) [2022-03-03 18:42:17,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-03 18:42:17,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:17,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:17,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73477738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:17,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:17,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-03 18:42:17,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043217919] [2022-03-03 18:42:17,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:17,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:42:17,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:42:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:42:17,598 INFO L87 Difference]: Start difference. First operand 1112 states and 3364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:17,973 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2022-03-03 18:42:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:42:17,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:17,975 INFO L225 Difference]: With dead ends: 1470 [2022-03-03 18:42:17,975 INFO L226 Difference]: Without dead ends: 1454 [2022-03-03 18:42:17,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:42:17,976 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 121 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:17,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 134 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-03-03 18:42:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2022-03-03 18:42:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.028045574057844) internal successors, (3455), 1141 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2022-03-03 18:42:17,990 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2022-03-03 18:42:17,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:17,990 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2022-03-03 18:42:17,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:17,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2022-03-03 18:42:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:17,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:17,992 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:18,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-03 18:42:18,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:18,193 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash -331329713, now seen corresponding path program 125 times [2022-03-03 18:42:18,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:18,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367880832] [2022-03-03 18:42:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:18,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:18,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367880832] [2022-03-03 18:42:18,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367880832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:18,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304793519] [2022-03-03 18:42:18,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:18,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:18,250 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) [2022-03-03 18:42:18,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-03 18:42:18,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:42:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:18,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304793519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:18,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:18,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-03 18:42:18,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017041214] [2022-03-03 18:42:18,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:18,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:42:18,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:42:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:42:18,380 INFO L87 Difference]: Start difference. First operand 1142 states and 3455 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:18,492 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2022-03-03 18:42:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:42:18,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:18,494 INFO L225 Difference]: With dead ends: 1462 [2022-03-03 18:42:18,494 INFO L226 Difference]: Without dead ends: 1462 [2022-03-03 18:42:18,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:42:18,494 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:18,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 105 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-03-03 18:42:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2022-03-03 18:42:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.0300687285223367) internal successors, (3527), 1164 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2022-03-03 18:42:18,508 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2022-03-03 18:42:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:18,508 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2022-03-03 18:42:18,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2022-03-03 18:42:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:18,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:18,510 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:18,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:18,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-03 18:42:18,710 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2091382653, now seen corresponding path program 126 times [2022-03-03 18:42:18,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:18,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753321340] [2022-03-03 18:42:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:18,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:18,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:18,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753321340] [2022-03-03 18:42:18,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753321340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:18,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366588592] [2022-03-03 18:42:18,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:18,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:18,758 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) [2022-03-03 18:42:18,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-03 18:42:18,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:42:18,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:18,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:18,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366588592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:18,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:18,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:18,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336348764] [2022-03-03 18:42:18,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:18,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:18,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:18,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:18,879 INFO L87 Difference]: Start difference. First operand 1165 states and 3527 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:19,046 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2022-03-03 18:42:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:42:19,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:19,049 INFO L225 Difference]: With dead ends: 1324 [2022-03-03 18:42:19,049 INFO L226 Difference]: Without dead ends: 1324 [2022-03-03 18:42:19,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:42:19,049 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:19,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 81 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-03-03 18:42:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2022-03-03 18:42:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.0299914310197087) internal successors, (3536), 1167 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2022-03-03 18:42:19,068 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2022-03-03 18:42:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:19,068 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2022-03-03 18:42:19,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2022-03-03 18:42:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:19,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:19,070 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:19,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:19,292 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,SelfDestructingSolverStorable139 [2022-03-03 18:42:19,292 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1205584373, now seen corresponding path program 127 times [2022-03-03 18:42:19,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:19,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958913889] [2022-03-03 18:42:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:19,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:19,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:19,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958913889] [2022-03-03 18:42:19,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958913889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:19,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948219521] [2022-03-03 18:42:19,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:19,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:19,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:19,350 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) [2022-03-03 18:42:19,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-03 18:42:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:19,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:19,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948219521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:19,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:19,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:19,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181435260] [2022-03-03 18:42:19,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:19,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:19,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:19,486 INFO L87 Difference]: Start difference. First operand 1168 states and 3536 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:19,721 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2022-03-03 18:42:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:42:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:19,724 INFO L225 Difference]: With dead ends: 1344 [2022-03-03 18:42:19,724 INFO L226 Difference]: Without dead ends: 1344 [2022-03-03 18:42:19,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:42:19,724 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:19,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 96 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-03-03 18:42:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2022-03-03 18:42:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.029838022165388) internal successors, (3554), 1173 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2022-03-03 18:42:19,751 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2022-03-03 18:42:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:19,752 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2022-03-03 18:42:19,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2022-03-03 18:42:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:19,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:19,754 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:19,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:19,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:19,975 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 901199747, now seen corresponding path program 128 times [2022-03-03 18:42:19,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:19,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711698355] [2022-03-03 18:42:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:20,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:20,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711698355] [2022-03-03 18:42:20,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711698355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:20,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301831700] [2022-03-03 18:42:20,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:20,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:20,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:20,020 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) [2022-03-03 18:42:20,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-03 18:42:20,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:20,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:20,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:20,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301831700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:20,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:20,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:20,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195545138] [2022-03-03 18:42:20,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:20,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:20,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:20,168 INFO L87 Difference]: Start difference. First operand 1174 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:20,518 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2022-03-03 18:42:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 18:42:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:20,520 INFO L225 Difference]: With dead ends: 1444 [2022-03-03 18:42:20,520 INFO L226 Difference]: Without dead ends: 1444 [2022-03-03 18:42:20,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:42:20,520 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:20,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 143 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-03-03 18:42:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2022-03-03 18:42:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.0334168755221387) internal successors, (3631), 1197 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2022-03-03 18:42:20,535 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2022-03-03 18:42:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:20,535 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2022-03-03 18:42:20,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2022-03-03 18:42:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:20,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:20,536 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:20,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-03 18:42:20,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:20,737 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1247596789, now seen corresponding path program 129 times [2022-03-03 18:42:20,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:20,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826825861] [2022-03-03 18:42:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:20,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:20,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826825861] [2022-03-03 18:42:20,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826825861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:20,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681170212] [2022-03-03 18:42:20,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:20,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:20,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:20,789 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) [2022-03-03 18:42:20,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-03 18:42:20,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:42:20,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:20,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:20,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681170212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:20,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:20,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:20,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054801754] [2022-03-03 18:42:20,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:20,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:20,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:20,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:20,920 INFO L87 Difference]: Start difference. First operand 1198 states and 3631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:21,304 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2022-03-03 18:42:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 18:42:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:21,307 INFO L225 Difference]: With dead ends: 1560 [2022-03-03 18:42:21,307 INFO L226 Difference]: Without dead ends: 1560 [2022-03-03 18:42:21,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:42:21,307 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 149 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:21,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 153 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-03-03 18:42:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2022-03-03 18:42:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.0389500423370026) internal successors, (3589), 1181 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2022-03-03 18:42:21,329 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2022-03-03 18:42:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:21,329 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2022-03-03 18:42:21,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2022-03-03 18:42:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:21,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:21,330 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:21,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-03 18:42:21,530 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,SelfDestructingSolverStorable142 [2022-03-03 18:42:21,531 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash -676141983, now seen corresponding path program 130 times [2022-03-03 18:42:21,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:21,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128864251] [2022-03-03 18:42:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:21,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:21,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:21,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128864251] [2022-03-03 18:42:21,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128864251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:21,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759033713] [2022-03-03 18:42:21,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:21,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:21,576 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) [2022-03-03 18:42:21,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-03 18:42:21,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:21,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:21,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:21,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:21,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759033713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:21,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:21,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:21,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404547218] [2022-03-03 18:42:21,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:21,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:21,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:21,700 INFO L87 Difference]: Start difference. First operand 1182 states and 3589 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:22,071 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2022-03-03 18:42:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:42:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:22,073 INFO L225 Difference]: With dead ends: 1402 [2022-03-03 18:42:22,073 INFO L226 Difference]: Without dead ends: 1396 [2022-03-03 18:42:22,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 18:42:22,074 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:22,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 132 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-03-03 18:42:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2022-03-03 18:42:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.0246913580246915) internal successors, (3430), 1134 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2022-03-03 18:42:22,088 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2022-03-03 18:42:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:22,088 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2022-03-03 18:42:22,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-03 18:42:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2022-03-03 18:42:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:22,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:22,089 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:22,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-03 18:42:22,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:22,290 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:22,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1687253767, now seen corresponding path program 131 times [2022-03-03 18:42:22,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:22,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748825319] [2022-03-03 18:42:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:22,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:22,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748825319] [2022-03-03 18:42:22,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748825319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:22,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767931470] [2022-03-03 18:42:22,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:22,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:22,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:22,344 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) [2022-03-03 18:42:22,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-03 18:42:22,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:42:22,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:22,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:22,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:22,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:22,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767931470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:22,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:22,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:22,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010519532] [2022-03-03 18:42:22,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:22,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:22,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:22,497 INFO L87 Difference]: Start difference. First operand 1135 states and 3430 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:22,873 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2022-03-03 18:42:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 18:42:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:22,875 INFO L225 Difference]: With dead ends: 1746 [2022-03-03 18:42:22,875 INFO L226 Difference]: Without dead ends: 1737 [2022-03-03 18:42:22,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:42:22,876 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 179 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:22,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 132 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-03-03 18:42:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2022-03-03 18:42:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.0662604722010665) internal successors, (4026), 1313 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2022-03-03 18:42:22,905 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2022-03-03 18:42:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:22,905 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2022-03-03 18:42:22,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2022-03-03 18:42:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:22,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:22,907 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:22,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-03 18:42:23,127 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,SelfDestructingSolverStorable144 [2022-03-03 18:42:23,127 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1222662663, now seen corresponding path program 132 times [2022-03-03 18:42:23,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:23,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293781247] [2022-03-03 18:42:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:23,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:23,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293781247] [2022-03-03 18:42:23,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293781247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:23,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474731408] [2022-03-03 18:42:23,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:23,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:23,173 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) [2022-03-03 18:42:23,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-03 18:42:23,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:42:23,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:23,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:23,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474731408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:23,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:23,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:23,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931309878] [2022-03-03 18:42:23,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:23,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:23,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:23,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:23,305 INFO L87 Difference]: Start difference. First operand 1314 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:23,668 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2022-03-03 18:42:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:42:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:23,671 INFO L225 Difference]: With dead ends: 1701 [2022-03-03 18:42:23,671 INFO L226 Difference]: Without dead ends: 1697 [2022-03-03 18:42:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 18:42:23,671 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 117 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-03-03 18:42:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2022-03-03 18:42:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.031325301204819) internal successors, (3774), 1245 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2022-03-03 18:42:23,689 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2022-03-03 18:42:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:23,689 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2022-03-03 18:42:23,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2022-03-03 18:42:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:23,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:23,690 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:23,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-03 18:42:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:23,891 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1189063435, now seen corresponding path program 133 times [2022-03-03 18:42:23,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:23,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461335572] [2022-03-03 18:42:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:23,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:23,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:23,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461335572] [2022-03-03 18:42:23,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461335572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:23,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440737068] [2022-03-03 18:42:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:23,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:23,937 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) [2022-03-03 18:42:23,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-03 18:42:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:23,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:24,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:24,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440737068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:24,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:24,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:24,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026175599] [2022-03-03 18:42:24,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:24,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:24,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:24,064 INFO L87 Difference]: Start difference. First operand 1246 states and 3774 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:24,388 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2022-03-03 18:42:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:42:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:24,390 INFO L225 Difference]: With dead ends: 1682 [2022-03-03 18:42:24,391 INFO L226 Difference]: Without dead ends: 1674 [2022-03-03 18:42:24,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 18:42:24,391 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 175 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 103 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-03-03 18:42:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2022-03-03 18:42:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.0338983050847457) internal successors, (3938), 1298 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2022-03-03 18:42:24,411 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2022-03-03 18:42:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:24,411 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2022-03-03 18:42:24,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2022-03-03 18:42:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:24,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:24,412 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:24,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-03 18:42:24,613 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,SelfDestructingSolverStorable146 [2022-03-03 18:42:24,613 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash 147487367, now seen corresponding path program 134 times [2022-03-03 18:42:24,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:24,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038919309] [2022-03-03 18:42:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:24,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:24,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038919309] [2022-03-03 18:42:24,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038919309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:24,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228181863] [2022-03-03 18:42:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:24,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:24,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:24,658 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) [2022-03-03 18:42:24,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-03 18:42:24,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:24,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:24,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:24,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:24,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228181863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:24,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:24,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:24,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432857583] [2022-03-03 18:42:24,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:24,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:24,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:24,790 INFO L87 Difference]: Start difference. First operand 1299 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:25,060 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2022-03-03 18:42:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 18:42:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:25,063 INFO L225 Difference]: With dead ends: 1724 [2022-03-03 18:42:25,063 INFO L226 Difference]: Without dead ends: 1712 [2022-03-03 18:42:25,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:42:25,064 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 197 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:25,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 78 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-03-03 18:42:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2022-03-03 18:42:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.026575550493546) internal successors, (3986), 1317 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2022-03-03 18:42:25,080 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2022-03-03 18:42:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:25,080 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2022-03-03 18:42:25,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2022-03-03 18:42:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:25,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:25,082 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:25,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-03 18:42:25,282 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,SelfDestructingSolverStorable147 [2022-03-03 18:42:25,283 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2076599669, now seen corresponding path program 135 times [2022-03-03 18:42:25,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:25,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384960479] [2022-03-03 18:42:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:25,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:25,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384960479] [2022-03-03 18:42:25,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384960479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:25,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097648309] [2022-03-03 18:42:25,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:25,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:25,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:25,339 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) [2022-03-03 18:42:25,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-03 18:42:25,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:42:25,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:25,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:25,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:25,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:25,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097648309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:25,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:25,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 18:42:25,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555387468] [2022-03-03 18:42:25,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:25,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:25,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:25,496 INFO L87 Difference]: Start difference. First operand 1318 states and 3986 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:25,717 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2022-03-03 18:42:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:42:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:25,727 INFO L225 Difference]: With dead ends: 1567 [2022-03-03 18:42:25,727 INFO L226 Difference]: Without dead ends: 1559 [2022-03-03 18:42:25,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:42:25,727 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 179 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:25,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 75 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-03-03 18:42:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2022-03-03 18:42:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.023538344722855) internal successors, (3982), 1317 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2022-03-03 18:42:25,745 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2022-03-03 18:42:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:25,745 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2022-03-03 18:42:25,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2022-03-03 18:42:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:25,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:25,747 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:25,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:25,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-03 18:42:25,969 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 703275655, now seen corresponding path program 136 times [2022-03-03 18:42:25,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:25,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863452836] [2022-03-03 18:42:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:25,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:26,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:26,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863452836] [2022-03-03 18:42:26,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863452836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:26,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037471847] [2022-03-03 18:42:26,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:26,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:26,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:26,015 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) [2022-03-03 18:42:26,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-03 18:42:26,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:26,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:26,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:26,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037471847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:26,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:26,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-03 18:42:26,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068642746] [2022-03-03 18:42:26,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:26,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 18:42:26,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 18:42:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-03 18:42:26,133 INFO L87 Difference]: Start difference. First operand 1318 states and 3982 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:26,227 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2022-03-03 18:42:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:42:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:26,229 INFO L225 Difference]: With dead ends: 1464 [2022-03-03 18:42:26,229 INFO L226 Difference]: Without dead ends: 1454 [2022-03-03 18:42:26,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:42:26,229 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:26,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:42:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-03-03 18:42:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2022-03-03 18:42:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.0227790432801824) internal successors, (3981), 1317 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2022-03-03 18:42:26,244 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2022-03-03 18:42:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:26,244 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2022-03-03 18:42:26,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2022-03-03 18:42:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:26,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:26,246 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:26,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-03 18:42:26,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-03 18:42:26,447 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -818448945, now seen corresponding path program 137 times [2022-03-03 18:42:26,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:26,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83932562] [2022-03-03 18:42:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:26,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:26,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83932562] [2022-03-03 18:42:26,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83932562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:26,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789417356] [2022-03-03 18:42:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:26,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:26,500 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) [2022-03-03 18:42:26,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-03 18:42:26,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:42:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:26,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:26,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789417356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:26,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:26,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-03 18:42:26,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046243708] [2022-03-03 18:42:26,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:26,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:26,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:26,633 INFO L87 Difference]: Start difference. First operand 1318 states and 3981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:26,922 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2022-03-03 18:42:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:42:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:26,924 INFO L225 Difference]: With dead ends: 1488 [2022-03-03 18:42:26,924 INFO L226 Difference]: Without dead ends: 1488 [2022-03-03 18:42:26,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:42:26,925 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:26,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 88 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-03-03 18:42:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2022-03-03 18:42:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.0227445034116753) internal successors, (3987), 1319 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2022-03-03 18:42:26,950 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2022-03-03 18:42:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:26,950 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2022-03-03 18:42:26,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2022-03-03 18:42:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:26,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:26,952 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:26,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:27,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:27,152 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1757292239, now seen corresponding path program 138 times [2022-03-03 18:42:27,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:27,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237094235] [2022-03-03 18:42:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:27,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:27,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:27,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237094235] [2022-03-03 18:42:27,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237094235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:27,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551183968] [2022-03-03 18:42:27,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:27,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:27,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:27,193 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) [2022-03-03 18:42:27,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-03 18:42:27,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:42:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:27,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:27,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551183968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:27,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:27,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-03 18:42:27,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240798759] [2022-03-03 18:42:27,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:27,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:27,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:27,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:27,324 INFO L87 Difference]: Start difference. First operand 1320 states and 3987 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:27,574 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2022-03-03 18:42:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 18:42:27,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:27,577 INFO L225 Difference]: With dead ends: 1578 [2022-03-03 18:42:27,577 INFO L226 Difference]: Without dead ends: 1572 [2022-03-03 18:42:27,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:42:27,577 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:27,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 85 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-03-03 18:42:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2022-03-03 18:42:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.02023988005997) internal successors, (4029), 1334 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2022-03-03 18:42:27,594 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2022-03-03 18:42:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:27,595 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2022-03-03 18:42:27,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2022-03-03 18:42:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:27,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:27,596 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:27,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-03 18:42:27,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:27,798 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash 454907343, now seen corresponding path program 139 times [2022-03-03 18:42:27,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:27,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679623840] [2022-03-03 18:42:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:27,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:27,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:27,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679623840] [2022-03-03 18:42:27,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679623840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:27,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137019629] [2022-03-03 18:42:27,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:27,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:27,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:27,839 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) [2022-03-03 18:42:27,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-03 18:42:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:27,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:27,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:27,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:27,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137019629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:27,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:27,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-03 18:42:27,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176336940] [2022-03-03 18:42:27,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:27,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:27,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:27,970 INFO L87 Difference]: Start difference. First operand 1335 states and 4029 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:28,244 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2022-03-03 18:42:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:42:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:28,246 INFO L225 Difference]: With dead ends: 1610 [2022-03-03 18:42:28,246 INFO L226 Difference]: Without dead ends: 1606 [2022-03-03 18:42:28,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:42:28,247 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:28,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 116 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-03-03 18:42:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2022-03-03 18:42:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.018896447467876) internal successors, (3994), 1323 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2022-03-03 18:42:28,271 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2022-03-03 18:42:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:28,271 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2022-03-03 18:42:28,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2022-03-03 18:42:28,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:28,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:28,272 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:28,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-03 18:42:28,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:28,473 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash 412894927, now seen corresponding path program 140 times [2022-03-03 18:42:28,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:28,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872293935] [2022-03-03 18:42:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:28,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:28,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:28,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872293935] [2022-03-03 18:42:28,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872293935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:28,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32330725] [2022-03-03 18:42:28,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:28,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:28,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:28,513 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) [2022-03-03 18:42:28,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-03 18:42:28,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:28,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:28,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:28,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32330725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:28,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:28,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-03 18:42:28,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962062506] [2022-03-03 18:42:28,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:28,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:28,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:28,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:28,641 INFO L87 Difference]: Start difference. First operand 1324 states and 3994 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:28,982 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2022-03-03 18:42:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 18:42:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:28,985 INFO L225 Difference]: With dead ends: 1777 [2022-03-03 18:42:28,985 INFO L226 Difference]: Without dead ends: 1777 [2022-03-03 18:42:28,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:42:28,985 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:28,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 145 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2022-03-03 18:42:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2022-03-03 18:42:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.0270067516879218) internal successors, (4035), 1333 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2022-03-03 18:42:29,002 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2022-03-03 18:42:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:29,002 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2022-03-03 18:42:29,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2022-03-03 18:42:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:29,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:29,004 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:29,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-03 18:42:29,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:29,205 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:29,205 INFO L85 PathProgramCache]: Analyzing trace with hash 984349733, now seen corresponding path program 141 times [2022-03-03 18:42:29,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:29,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776973025] [2022-03-03 18:42:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:29,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:29,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:29,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776973025] [2022-03-03 18:42:29,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776973025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:29,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270983609] [2022-03-03 18:42:29,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:29,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:29,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:29,246 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) [2022-03-03 18:42:29,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-03 18:42:29,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:42:29,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:29,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:29,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270983609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:29,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:29,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-03 18:42:29,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593088959] [2022-03-03 18:42:29,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:29,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:29,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:29,379 INFO L87 Difference]: Start difference. First operand 1334 states and 4035 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:29,791 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2022-03-03 18:42:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:42:29,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:29,794 INFO L225 Difference]: With dead ends: 1692 [2022-03-03 18:42:29,794 INFO L226 Difference]: Without dead ends: 1683 [2022-03-03 18:42:29,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 18:42:29,794 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:29,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 139 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-03-03 18:42:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2022-03-03 18:42:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.0101641907740424) internal successors, (3850), 1279 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2022-03-03 18:42:29,811 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2022-03-03 18:42:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:29,811 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2022-03-03 18:42:29,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2022-03-03 18:42:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:29,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:29,813 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:29,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:30,027 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,SelfDestructingSolverStorable154 [2022-03-03 18:42:30,027 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1519579535, now seen corresponding path program 142 times [2022-03-03 18:42:30,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:30,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152697369] [2022-03-03 18:42:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:30,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:30,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152697369] [2022-03-03 18:42:30,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152697369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:30,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570127478] [2022-03-03 18:42:30,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:30,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:30,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:30,073 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) [2022-03-03 18:42:30,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-03 18:42:30,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:30,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:30,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:30,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:30,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570127478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:30,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:30,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-03 18:42:30,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796475124] [2022-03-03 18:42:30,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:30,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:30,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:30,218 INFO L87 Difference]: Start difference. First operand 1280 states and 3850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:30,594 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2022-03-03 18:42:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:42:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:30,596 INFO L225 Difference]: With dead ends: 1586 [2022-03-03 18:42:30,596 INFO L226 Difference]: Without dead ends: 1574 [2022-03-03 18:42:30,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 18:42:30,597 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:30,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 110 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-03-03 18:42:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2022-03-03 18:42:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.011627906976744) internal successors, (3885), 1290 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2022-03-03 18:42:30,616 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2022-03-03 18:42:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:30,616 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2022-03-03 18:42:30,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2022-03-03 18:42:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:30,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:30,618 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:30,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-03 18:42:30,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:30,818 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -12209661, now seen corresponding path program 143 times [2022-03-03 18:42:30,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:30,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843789635] [2022-03-03 18:42:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:30,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:30,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843789635] [2022-03-03 18:42:30,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843789635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:30,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139895976] [2022-03-03 18:42:30,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:30,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:30,869 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) [2022-03-03 18:42:30,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-03 18:42:30,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:42:30,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:30,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:30,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:31,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139895976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:31,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:31,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-03 18:42:31,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60231218] [2022-03-03 18:42:31,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:31,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:42:31,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:42:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:42:31,032 INFO L87 Difference]: Start difference. First operand 1291 states and 3885 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:31,375 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2022-03-03 18:42:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 18:42:31,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:31,377 INFO L225 Difference]: With dead ends: 1481 [2022-03-03 18:42:31,377 INFO L226 Difference]: Without dead ends: 1481 [2022-03-03 18:42:31,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 18:42:31,377 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:31,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 96 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-03-03 18:42:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2022-03-03 18:42:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.0101483216237312) internal successors, (3856), 1281 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2022-03-03 18:42:31,393 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2022-03-03 18:42:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:31,393 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2022-03-03 18:42:31,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2022-03-03 18:42:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:31,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:31,395 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:31,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:31,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-03 18:42:31,618 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -882813301, now seen corresponding path program 144 times [2022-03-03 18:42:31,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:31,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631920904] [2022-03-03 18:42:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:31,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:31,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631920904] [2022-03-03 18:42:31,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631920904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:31,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450168946] [2022-03-03 18:42:31,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:31,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:31,658 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) [2022-03-03 18:42:31,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-03 18:42:31,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:42:31,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:31,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:31,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:31,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450168946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:31,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:31,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-03-03 18:42:31,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886028404] [2022-03-03 18:42:31,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:31,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:31,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:31,799 INFO L87 Difference]: Start difference. First operand 1282 states and 3856 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:32,114 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2022-03-03 18:42:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:42:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:32,116 INFO L225 Difference]: With dead ends: 1620 [2022-03-03 18:42:32,116 INFO L226 Difference]: Without dead ends: 1614 [2022-03-03 18:42:32,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:42:32,116 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:32,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 132 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-03-03 18:42:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2022-03-03 18:42:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.013803680981595) internal successors, (3930), 1304 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2022-03-03 18:42:32,132 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2022-03-03 18:42:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:32,132 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2022-03-03 18:42:32,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2022-03-03 18:42:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:32,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:32,135 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:32,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:32,356 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,SelfDestructingSolverStorable157 [2022-03-03 18:42:32,357 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash -495255293, now seen corresponding path program 145 times [2022-03-03 18:42:32,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:32,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908712204] [2022-03-03 18:42:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:32,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:32,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908712204] [2022-03-03 18:42:32,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908712204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:32,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608206682] [2022-03-03 18:42:32,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:32,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:32,394 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) [2022-03-03 18:42:32,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-03 18:42:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:32,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:32,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:32,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608206682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:32,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:32,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-03 18:42:32,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028935203] [2022-03-03 18:42:32,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:32,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:32,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:32,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:32,539 INFO L87 Difference]: Start difference. First operand 1305 states and 3930 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:32,847 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2022-03-03 18:42:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:42:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:32,850 INFO L225 Difference]: With dead ends: 1830 [2022-03-03 18:42:32,850 INFO L226 Difference]: Without dead ends: 1828 [2022-03-03 18:42:32,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:42:32,851 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 108 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:32,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 168 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-03-03 18:42:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2022-03-03 18:42:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.013392857142857) internal successors, (4050), 1344 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2022-03-03 18:42:32,868 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2022-03-03 18:42:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:32,868 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2022-03-03 18:42:32,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2022-03-03 18:42:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:32,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:32,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:32,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:33,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-03 18:42:33,084 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash 348530571, now seen corresponding path program 146 times [2022-03-03 18:42:33,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:33,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782492638] [2022-03-03 18:42:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:33,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:33,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782492638] [2022-03-03 18:42:33,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782492638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:33,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309016609] [2022-03-03 18:42:33,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:33,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:33,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:33,122 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) [2022-03-03 18:42:33,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-03 18:42:33,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:33,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:33,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:33,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309016609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:33,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:33,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-03 18:42:33,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8824929] [2022-03-03 18:42:33,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:33,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:33,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:33,257 INFO L87 Difference]: Start difference. First operand 1345 states and 4050 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:33,560 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2022-03-03 18:42:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 18:42:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:33,562 INFO L225 Difference]: With dead ends: 1888 [2022-03-03 18:42:33,562 INFO L226 Difference]: Without dead ends: 1888 [2022-03-03 18:42:33,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:42:33,563 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 179 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:33,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 114 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-03-03 18:42:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2022-03-03 18:42:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.0257510729613735) internal successors, (4230), 1398 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2022-03-03 18:42:33,580 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2022-03-03 18:42:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:33,580 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2022-03-03 18:42:33,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2022-03-03 18:42:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:33,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:33,582 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:33,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-03 18:42:33,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-03-03 18:42:33,782 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash 919985377, now seen corresponding path program 147 times [2022-03-03 18:42:33,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:33,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110849489] [2022-03-03 18:42:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:33,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:33,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:33,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110849489] [2022-03-03 18:42:33,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110849489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:33,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292817191] [2022-03-03 18:42:33,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:33,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:33,819 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) [2022-03-03 18:42:33,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-03 18:42:33,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:42:33,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:33,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:33,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:33,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292817191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:33,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:33,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-03 18:42:33,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237694156] [2022-03-03 18:42:33,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:33,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:33,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:33,961 INFO L87 Difference]: Start difference. First operand 1399 states and 4230 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:34,399 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2022-03-03 18:42:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 18:42:34,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:34,402 INFO L225 Difference]: With dead ends: 1840 [2022-03-03 18:42:34,402 INFO L226 Difference]: Without dead ends: 1831 [2022-03-03 18:42:34,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:42:34,402 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:34,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 143 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-03 18:42:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2022-03-03 18:42:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.015362106803219) internal successors, (4122), 1367 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2022-03-03 18:42:34,419 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2022-03-03 18:42:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:34,419 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2022-03-03 18:42:34,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2022-03-03 18:42:34,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:34,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:34,421 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:34,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-03 18:42:34,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:34,621 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:34,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1455215179, now seen corresponding path program 148 times [2022-03-03 18:42:34,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:34,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407593918] [2022-03-03 18:42:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:34,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:34,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:34,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407593918] [2022-03-03 18:42:34,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407593918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:34,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931876705] [2022-03-03 18:42:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:34,665 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) [2022-03-03 18:42:34,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-03 18:42:34,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:34,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:34,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931876705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:34,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:34,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-03-03 18:42:34,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007260516] [2022-03-03 18:42:34,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:34,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:34,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:34,804 INFO L87 Difference]: Start difference. First operand 1368 states and 4122 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:35,215 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2022-03-03 18:42:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:42:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:35,217 INFO L225 Difference]: With dead ends: 1834 [2022-03-03 18:42:35,217 INFO L226 Difference]: Without dead ends: 1822 [2022-03-03 18:42:35,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:42:35,218 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:35,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 138 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-03-03 18:42:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2022-03-03 18:42:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.015578635014837) internal successors, (4065), 1348 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2022-03-03 18:42:35,244 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2022-03-03 18:42:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:35,244 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2022-03-03 18:42:35,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2022-03-03 18:42:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:35,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:35,245 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:35,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-03 18:42:35,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-03 18:42:35,446 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 867469857, now seen corresponding path program 149 times [2022-03-03 18:42:35,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:35,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512634823] [2022-03-03 18:42:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:35,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:35,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:35,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512634823] [2022-03-03 18:42:35,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512634823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:35,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354275746] [2022-03-03 18:42:35,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:35,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:35,493 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) [2022-03-03 18:42:35,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-03 18:42:35,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:42:35,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:35,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:35,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:35,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354275746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:35,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:35,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-03 18:42:35,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734843007] [2022-03-03 18:42:35,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:42:35,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:42:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:42:35,635 INFO L87 Difference]: Start difference. First operand 1349 states and 4065 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:35,995 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2022-03-03 18:42:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 18:42:35,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:35,998 INFO L225 Difference]: With dead ends: 1747 [2022-03-03 18:42:35,998 INFO L226 Difference]: Without dead ends: 1729 [2022-03-03 18:42:35,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:42:35,998 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:35,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 102 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-03-03 18:42:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2022-03-03 18:42:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.0198237885462555) internal successors, (4113), 1362 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2022-03-03 18:42:36,014 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2022-03-03 18:42:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:36,015 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2022-03-03 18:42:36,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2022-03-03 18:42:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:36,016 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:36,016 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:36,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:36,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:36,217 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash -788595633, now seen corresponding path program 150 times [2022-03-03 18:42:36,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:36,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155554943] [2022-03-03 18:42:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:36,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:36,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:36,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155554943] [2022-03-03 18:42:36,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155554943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:36,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803807545] [2022-03-03 18:42:36,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:36,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:36,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:36,266 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) [2022-03-03 18:42:36,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-03 18:42:36,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:42:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:36,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:36,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:36,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803807545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:36,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:36,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-03 18:42:36,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407968329] [2022-03-03 18:42:36,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:36,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:42:36,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:42:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:42:36,421 INFO L87 Difference]: Start difference. First operand 1363 states and 4113 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:36,802 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2022-03-03 18:42:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 18:42:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:36,805 INFO L225 Difference]: With dead ends: 1698 [2022-03-03 18:42:36,805 INFO L226 Difference]: Without dead ends: 1698 [2022-03-03 18:42:36,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 18:42:36,805 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:36,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 120 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-03-03 18:42:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2022-03-03 18:42:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.013581129378127) internal successors, (4216), 1399 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2022-03-03 18:42:36,821 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2022-03-03 18:42:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:36,821 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2022-03-03 18:42:36,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2022-03-03 18:42:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:36,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:36,823 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:36,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-03 18:42:37,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:37,024 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1121706417, now seen corresponding path program 151 times [2022-03-03 18:42:37,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:37,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578736208] [2022-03-03 18:42:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:37,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:37,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578736208] [2022-03-03 18:42:37,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578736208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:37,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479558590] [2022-03-03 18:42:37,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:37,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:37,065 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) [2022-03-03 18:42:37,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-03 18:42:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:37,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:37,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479558590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:37,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:37,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-03 18:42:37,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733644142] [2022-03-03 18:42:37,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:37,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:42:37,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:42:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:42:37,215 INFO L87 Difference]: Start difference. First operand 1400 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:37,542 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2022-03-03 18:42:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 18:42:37,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:37,545 INFO L225 Difference]: With dead ends: 1946 [2022-03-03 18:42:37,545 INFO L226 Difference]: Without dead ends: 1946 [2022-03-03 18:42:37,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:42:37,546 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:37,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 200 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-03 18:42:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2022-03-03 18:42:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.0202020202020203) internal successors, (4485), 1485 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2022-03-03 18:42:37,563 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2022-03-03 18:42:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:37,564 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2022-03-03 18:42:37,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2022-03-03 18:42:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:37,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:37,565 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:37,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-03 18:42:37,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:37,766 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash 114474063, now seen corresponding path program 152 times [2022-03-03 18:42:37,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:37,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339061453] [2022-03-03 18:42:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:37,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:37,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339061453] [2022-03-03 18:42:37,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339061453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:37,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444328650] [2022-03-03 18:42:37,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:37,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:37,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:37,803 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) [2022-03-03 18:42:37,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-03 18:42:37,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:37,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:37,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:37,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444328650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:37,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:37,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-03-03 18:42:37,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561408658] [2022-03-03 18:42:37,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:37,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:37,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:37,949 INFO L87 Difference]: Start difference. First operand 1486 states and 4485 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:38,286 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2022-03-03 18:42:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 18:42:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:38,289 INFO L225 Difference]: With dead ends: 2146 [2022-03-03 18:42:38,289 INFO L226 Difference]: Without dead ends: 2146 [2022-03-03 18:42:38,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:42:38,290 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 114 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:38,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 242 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-03-03 18:42:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2022-03-03 18:42:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.034956304619226) internal successors, (4862), 1602 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2022-03-03 18:42:38,312 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2022-03-03 18:42:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:38,312 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2022-03-03 18:42:38,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2022-03-03 18:42:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:38,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:38,314 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:38,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-03 18:42:38,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:38,515 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:38,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1646764465, now seen corresponding path program 153 times [2022-03-03 18:42:38,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:38,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554244718] [2022-03-03 18:42:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:38,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:38,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:38,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554244718] [2022-03-03 18:42:38,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554244718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:38,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140299853] [2022-03-03 18:42:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:38,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:38,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:38,548 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) [2022-03-03 18:42:38,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-03 18:42:38,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:42:38,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:38,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:38,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140299853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:38,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:38,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-03-03 18:42:38,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530330083] [2022-03-03 18:42:38,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:38,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:38,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:38,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:38,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:38,688 INFO L87 Difference]: Start difference. First operand 1603 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:39,014 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2022-03-03 18:42:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 18:42:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:39,018 INFO L225 Difference]: With dead ends: 2514 [2022-03-03 18:42:39,018 INFO L226 Difference]: Without dead ends: 2514 [2022-03-03 18:42:39,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:42:39,019 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:39,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 176 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-03-03 18:42:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2022-03-03 18:42:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.0701570680628274) internal successors, (5864), 1910 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2022-03-03 18:42:39,059 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2022-03-03 18:42:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:39,059 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2022-03-03 18:42:39,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2022-03-03 18:42:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:39,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:39,062 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:39,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-03 18:42:39,262 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,SelfDestructingSolverStorable166 [2022-03-03 18:42:39,262 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1075309659, now seen corresponding path program 154 times [2022-03-03 18:42:39,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:39,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139445349] [2022-03-03 18:42:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:39,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:39,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:39,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139445349] [2022-03-03 18:42:39,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139445349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:39,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472667930] [2022-03-03 18:42:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:39,295 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) [2022-03-03 18:42:39,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-03 18:42:39,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:39,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:39,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:39,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472667930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:39,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:39,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-03-03 18:42:39,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590089558] [2022-03-03 18:42:39,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:39,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 18:42:39,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 18:42:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:42:39,433 INFO L87 Difference]: Start difference. First operand 1911 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:39,935 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2022-03-03 18:42:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:42:39,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:39,938 INFO L225 Difference]: With dead ends: 2413 [2022-03-03 18:42:39,938 INFO L226 Difference]: Without dead ends: 2407 [2022-03-03 18:42:39,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 18:42:39,939 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:39,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 133 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-03-03 18:42:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2022-03-03 18:42:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.062466913710958) internal successors, (5785), 1889 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2022-03-03 18:42:39,966 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2022-03-03 18:42:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:39,966 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2022-03-03 18:42:39,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2022-03-03 18:42:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:39,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:39,968 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:39,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-03 18:42:40,168 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,SelfDestructingSolverStorable167 [2022-03-03 18:42:40,169 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash -540079857, now seen corresponding path program 155 times [2022-03-03 18:42:40,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:40,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383271439] [2022-03-03 18:42:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:40,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:40,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:40,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383271439] [2022-03-03 18:42:40,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383271439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:40,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526025173] [2022-03-03 18:42:40,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:40,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:40,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:40,206 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) [2022-03-03 18:42:40,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-03 18:42:40,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:42:40,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:40,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:40,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526025173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:40,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:40,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-03-03 18:42:40,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99865773] [2022-03-03 18:42:40,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:40,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 18:42:40,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 18:42:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-03 18:42:40,353 INFO L87 Difference]: Start difference. First operand 1890 states and 5785 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:40,815 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2022-03-03 18:42:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 18:42:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:40,818 INFO L225 Difference]: With dead ends: 2435 [2022-03-03 18:42:40,818 INFO L226 Difference]: Without dead ends: 2423 [2022-03-03 18:42:40,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 18:42:40,819 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:40,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 132 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2022-03-03 18:42:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2022-03-03 18:42:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.068642745709828) internal successors, (5901), 1923 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2022-03-03 18:42:40,844 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2022-03-03 18:42:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:40,844 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2022-03-03 18:42:40,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2022-03-03 18:42:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:40,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:40,846 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:40,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-03 18:42:41,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-03 18:42:41,047 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1127825179, now seen corresponding path program 156 times [2022-03-03 18:42:41,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:41,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855752421] [2022-03-03 18:42:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:41,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:41,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:41,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855752421] [2022-03-03 18:42:41,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855752421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:41,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790122387] [2022-03-03 18:42:41,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:41,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:41,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:41,099 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) [2022-03-03 18:42:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-03 18:42:41,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:42:41,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:41,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:41,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790122387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:41,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:41,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-03 18:42:41,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93881536] [2022-03-03 18:42:41,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:41,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:42:41,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:42:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:42:41,282 INFO L87 Difference]: Start difference. First operand 1924 states and 5901 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:41,720 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2022-03-03 18:42:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:42:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:41,724 INFO L225 Difference]: With dead ends: 2515 [2022-03-03 18:42:41,724 INFO L226 Difference]: Without dead ends: 2497 [2022-03-03 18:42:41,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:42:41,726 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:41,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 145 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-03-03 18:42:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2022-03-03 18:42:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.0759557344064388) internal successors, (6115), 1988 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2022-03-03 18:42:41,762 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2022-03-03 18:42:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:41,762 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2022-03-03 18:42:41,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2022-03-03 18:42:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 18:42:41,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:41,765 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:41,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-03 18:42:41,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:41,965 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2126906319, now seen corresponding path program 157 times [2022-03-03 18:42:41,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:41,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766577003] [2022-03-03 18:42:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:42,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:42,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766577003] [2022-03-03 18:42:42,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766577003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:42,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017109951] [2022-03-03 18:42:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:42,012 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) [2022-03-03 18:42:42,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-03 18:42:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 18:42:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:42,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:42,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017109951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:42,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:42,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-03 18:42:42,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677979041] [2022-03-03 18:42:42,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:42,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:42:42,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:42:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:42:42,172 INFO L87 Difference]: Start difference. First operand 1989 states and 6115 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:42,558 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2022-03-03 18:42:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:42:42,558 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 18:42:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:42,562 INFO L225 Difference]: With dead ends: 2460 [2022-03-03 18:42:42,562 INFO L226 Difference]: Without dead ends: 2436 [2022-03-03 18:42:42,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:42:42,562 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:42,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 125 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:42:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2022-03-03 18:42:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2022-03-03 18:42:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.073689416419387) internal successors, (6215), 2022 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2022-03-03 18:42:42,589 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2022-03-03 18:42:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:42,589 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2022-03-03 18:42:42,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2022-03-03 18:42:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:42,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:42,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:42,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-03 18:42:42,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:42,792 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1653562103, now seen corresponding path program 158 times [2022-03-03 18:42:42,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:42,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448711109] [2022-03-03 18:42:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:42,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:42,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:42,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448711109] [2022-03-03 18:42:42,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448711109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:42,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300848541] [2022-03-03 18:42:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:42,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:42,987 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) [2022-03-03 18:42:43,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-03 18:42:43,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:43,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:43,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:43,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300848541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:43,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:43,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-03-03 18:42:43,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724052945] [2022-03-03 18:42:43,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:43,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:42:43,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:42:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:42:43,514 INFO L87 Difference]: Start difference. First operand 2023 states and 6215 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:43,975 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2022-03-03 18:42:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:42:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 18:42:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:43,987 INFO L225 Difference]: With dead ends: 2290 [2022-03-03 18:42:43,987 INFO L226 Difference]: Without dead ends: 2264 [2022-03-03 18:42:43,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:42:43,988 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 138 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:43,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 518 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2022-03-03 18:42:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2022-03-03 18:42:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.054211035818006) internal successors, (6310), 2066 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2022-03-03 18:42:44,013 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2022-03-03 18:42:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:44,013 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2022-03-03 18:42:44,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2022-03-03 18:42:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:44,016 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:44,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:44,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:44,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:44,231 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash 344494571, now seen corresponding path program 159 times [2022-03-03 18:42:44,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:44,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734190131] [2022-03-03 18:42:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:44,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:44,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:44,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734190131] [2022-03-03 18:42:44,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734190131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:44,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778183919] [2022-03-03 18:42:44,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:44,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:44,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:44,384 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) [2022-03-03 18:42:44,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-03 18:42:44,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:42:44,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:44,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:44,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:44,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778183919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:44,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:44,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-03 18:42:44,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252484970] [2022-03-03 18:42:44,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:44,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:42:44,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:42:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:42:44,939 INFO L87 Difference]: Start difference. First operand 2067 states and 6310 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:45,312 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2022-03-03 18:42:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:42:45,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 18:42:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:45,316 INFO L225 Difference]: With dead ends: 2347 [2022-03-03 18:42:45,316 INFO L226 Difference]: Without dead ends: 2340 [2022-03-03 18:42:45,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:42:45,317 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 178 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:45,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 561 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2022-03-03 18:42:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2022-03-03 18:42:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.06465313827277) internal successors, (6494), 2119 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2022-03-03 18:42:45,348 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2022-03-03 18:42:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:45,348 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2022-03-03 18:42:45,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2022-03-03 18:42:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:45,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:45,351 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:45,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-03 18:42:45,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-03 18:42:45,551 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1959197295, now seen corresponding path program 160 times [2022-03-03 18:42:45,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:45,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54378197] [2022-03-03 18:42:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:45,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:45,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:45,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54378197] [2022-03-03 18:42:45,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54378197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:45,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804373689] [2022-03-03 18:42:45,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:45,669 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) [2022-03-03 18:42:45,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-03 18:42:45,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:45,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:45,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:45,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:46,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804373689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:46,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:46,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-03 18:42:46,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715646309] [2022-03-03 18:42:46,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:46,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:42:46,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:46,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:42:46,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:42:46,165 INFO L87 Difference]: Start difference. First operand 2120 states and 6494 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-03-03 18:42:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:46,610 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2022-03-03 18:42:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:42:46,610 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 [2022-03-03 18:42:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:46,614 INFO L225 Difference]: With dead ends: 2333 [2022-03-03 18:42:46,614 INFO L226 Difference]: Without dead ends: 2317 [2022-03-03 18:42:46,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:42:46,614 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:46,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 657 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:42:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-03-03 18:42:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2022-03-03 18:42:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-03-03 18:42:46,640 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-03-03 18:42:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:46,640 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-03-03 18:42:46,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-03-03 18:42:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-03-03 18:42:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:46,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:46,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:46,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-03 18:42:46,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:46,843 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:46,843 INFO L85 PathProgramCache]: Analyzing trace with hash 915949377, now seen corresponding path program 161 times [2022-03-03 18:42:46,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:46,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056736305] [2022-03-03 18:42:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:46,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:46,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:46,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056736305] [2022-03-03 18:42:46,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056736305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:46,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471538806] [2022-03-03 18:42:46,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:46,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:46,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:46,969 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) [2022-03-03 18:42:46,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-03 18:42:46,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:42:46,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:47,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:47,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471538806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:47,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:47,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-03 18:42:47,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519790025] [2022-03-03 18:42:47,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:47,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:42:47,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:42:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:42:47,487 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:47,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:47,882 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2022-03-03 18:42:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:42:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:42:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:47,886 INFO L225 Difference]: With dead ends: 2307 [2022-03-03 18:42:47,886 INFO L226 Difference]: Without dead ends: 2300 [2022-03-03 18:42:47,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:42:47,886 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 129 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:47,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 548 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-03-03 18:42:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2022-03-03 18:42:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-03-03 18:42:47,913 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-03-03 18:42:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:47,913 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-03-03 18:42:47,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-03-03 18:42:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:47,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:47,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:47,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-03 18:42:48,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:48,116 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1451179179, now seen corresponding path program 162 times [2022-03-03 18:42:48,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:48,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363878288] [2022-03-03 18:42:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:48,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:48,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363878288] [2022-03-03 18:42:48,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363878288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:48,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077397075] [2022-03-03 18:42:48,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:48,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:48,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:48,288 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) [2022-03-03 18:42:48,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-03 18:42:48,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:42:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:48,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:48,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077397075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:48,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:48,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-03 18:42:48,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380842875] [2022-03-03 18:42:48,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:48,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:42:48,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:48,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:42:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:42:48,789 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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) [2022-03-03 18:42:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:49,181 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2022-03-03 18:42:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:42:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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 21 [2022-03-03 18:42:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:49,185 INFO L225 Difference]: With dead ends: 2324 [2022-03-03 18:42:49,185 INFO L226 Difference]: Without dead ends: 2317 [2022-03-03 18:42:49,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:42:49,185 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:49,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 485 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-03-03 18:42:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2022-03-03 18:42:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-03-03 18:42:49,219 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-03-03 18:42:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:49,219 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-03-03 18:42:49,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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) [2022-03-03 18:42:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-03-03 18:42:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:49,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:49,222 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:49,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-03 18:42:49,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:49,422 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash 863433857, now seen corresponding path program 163 times [2022-03-03 18:42:49,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:49,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134934906] [2022-03-03 18:42:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:49,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:49,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134934906] [2022-03-03 18:42:49,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134934906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:49,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034873715] [2022-03-03 18:42:49,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:49,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:49,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:49,575 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) [2022-03-03 18:42:49,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-03 18:42:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:49,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:50,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034873715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:50,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:50,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-03-03 18:42:50,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960017356] [2022-03-03 18:42:50,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:50,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:42:50,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:42:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:42:50,047 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:50,514 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2022-03-03 18:42:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:42:50,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:42:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:50,519 INFO L225 Difference]: With dead ends: 2260 [2022-03-03 18:42:50,519 INFO L226 Difference]: Without dead ends: 2253 [2022-03-03 18:42:50,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:42:50,519 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 116 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:50,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 555 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:42:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-03-03 18:42:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2022-03-03 18:42:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-03-03 18:42:50,544 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-03-03 18:42:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:50,544 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-03-03 18:42:50,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-03-03 18:42:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:50,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:50,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:50,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:50,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:50,747 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1681421863, now seen corresponding path program 164 times [2022-03-03 18:42:50,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:50,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303237883] [2022-03-03 18:42:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:50,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:50,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:50,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303237883] [2022-03-03 18:42:50,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303237883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:50,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352730102] [2022-03-03 18:42:50,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:50,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:50,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:50,908 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) [2022-03-03 18:42:50,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-03 18:42:50,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:50,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:50,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:51,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:51,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352730102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:51,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:51,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 26 [2022-03-03 18:42:51,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353232664] [2022-03-03 18:42:51,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:51,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:42:51,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:51,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:42:51,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:42:51,464 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:51,824 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2022-03-03 18:42:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:42:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:42:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:51,828 INFO L225 Difference]: With dead ends: 2270 [2022-03-03 18:42:51,828 INFO L226 Difference]: Without dead ends: 2263 [2022-03-03 18:42:51,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:42:51,828 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 99 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:51,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 601 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-03-03 18:42:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2022-03-03 18:42:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.071022727272727) internal successors, (6486), 2112 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2022-03-03 18:42:51,857 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2022-03-03 18:42:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:51,857 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2022-03-03 18:42:51,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2022-03-03 18:42:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:51,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:51,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:51,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-03 18:42:52,060 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,SelfDestructingSolverStorable177 [2022-03-03 18:42:52,060 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -998842709, now seen corresponding path program 165 times [2022-03-03 18:42:52,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:52,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029266449] [2022-03-03 18:42:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:52,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:52,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:52,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029266449] [2022-03-03 18:42:52,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029266449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:52,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711286770] [2022-03-03 18:42:52,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:52,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:52,175 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) [2022-03-03 18:42:52,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-03 18:42:52,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:42:52,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:52,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:52,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:52,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711286770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:52,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:52,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 25 [2022-03-03 18:42:52,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864938848] [2022-03-03 18:42:52,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:42:52,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:42:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:42:52,688 INFO L87 Difference]: Start difference. First operand 2113 states and 6486 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:52,989 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2022-03-03 18:42:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:42:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:42:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:52,993 INFO L225 Difference]: With dead ends: 2271 [2022-03-03 18:42:52,993 INFO L226 Difference]: Without dead ends: 2262 [2022-03-03 18:42:52,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:42:52,993 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 154 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:52,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 462 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-03 18:42:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2022-03-03 18:42:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2022-03-03 18:42:53,019 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2022-03-03 18:42:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:53,019 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2022-03-03 18:42:53,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2022-03-03 18:42:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:53,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:53,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:53,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-03 18:42:53,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:53,222 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1216830759, now seen corresponding path program 166 times [2022-03-03 18:42:53,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:53,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274004481] [2022-03-03 18:42:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:53,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:53,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274004481] [2022-03-03 18:42:53,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274004481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:53,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514486673] [2022-03-03 18:42:53,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:42:53,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:53,354 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) [2022-03-03 18:42:53,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-03 18:42:53,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:42:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:53,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:53,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514486673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:53,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:53,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-03-03 18:42:53,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512674473] [2022-03-03 18:42:53,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:53,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:42:53,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:42:53,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:42:53,878 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2022-03-03 18:42:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:54,182 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2022-03-03 18:42:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:42:54,182 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 [2022-03-03 18:42:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:54,186 INFO L225 Difference]: With dead ends: 2235 [2022-03-03 18:42:54,186 INFO L226 Difference]: Without dead ends: 2228 [2022-03-03 18:42:54,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:42:54,186 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 99 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:54,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 446 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:42:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2022-03-03 18:42:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2022-03-03 18:42:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2022-03-03 18:42:54,221 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2022-03-03 18:42:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:54,221 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2022-03-03 18:42:54,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2022-03-03 18:42:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2022-03-03 18:42:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:54,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:54,223 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:54,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:54,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-03 18:42:54,424 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:54,425 INFO L85 PathProgramCache]: Analyzing trace with hash 176494955, now seen corresponding path program 167 times [2022-03-03 18:42:54,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:54,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755815975] [2022-03-03 18:42:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:54,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:54,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755815975] [2022-03-03 18:42:54,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755815975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:54,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38320359] [2022-03-03 18:42:54,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:42:54,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:54,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:54,550 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) [2022-03-03 18:42:54,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-03 18:42:54,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:42:54,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:54,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:54,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:54,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:55,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38320359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:55,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:55,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 26 [2022-03-03 18:42:55,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980768085] [2022-03-03 18:42:55,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:55,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:42:55,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:42:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:42:55,064 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:55,470 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2022-03-03 18:42:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:42:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:42:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:55,473 INFO L225 Difference]: With dead ends: 2462 [2022-03-03 18:42:55,473 INFO L226 Difference]: Without dead ends: 2445 [2022-03-03 18:42:55,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:42:55,474 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 130 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:55,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 599 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2022-03-03 18:42:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2022-03-03 18:42:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.083674397453388) internal successors, (6781), 2199 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2022-03-03 18:42:55,500 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2022-03-03 18:42:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:55,500 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2022-03-03 18:42:55,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2022-03-03 18:42:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:55,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:55,502 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:55,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:55,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:55,703 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1791197679, now seen corresponding path program 168 times [2022-03-03 18:42:55,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:55,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535636793] [2022-03-03 18:42:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:55,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:55,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535636793] [2022-03-03 18:42:55,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535636793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:55,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963791429] [2022-03-03 18:42:55,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:42:55,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:55,847 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) [2022-03-03 18:42:55,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-03 18:42:55,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:42:55,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:55,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:56,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:56,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963791429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:56,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:56,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 25 [2022-03-03 18:42:56,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60871125] [2022-03-03 18:42:56,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:56,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:42:56,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:42:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:42:56,391 INFO L87 Difference]: Start difference. First operand 2200 states and 6781 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-03-03 18:42:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:56,802 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2022-03-03 18:42:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:42:56,803 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 [2022-03-03 18:42:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:56,806 INFO L225 Difference]: With dead ends: 2464 [2022-03-03 18:42:56,806 INFO L226 Difference]: Without dead ends: 2446 [2022-03-03 18:42:56,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:42:56,807 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:56,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 683 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-03-03 18:42:56,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2022-03-03 18:42:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.0744827586206895) internal successors, (6687), 2175 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2022-03-03 18:42:56,833 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2022-03-03 18:42:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:56,833 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2022-03-03 18:42:56,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-03-03 18:42:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2022-03-03 18:42:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:56,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:56,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:56,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-03 18:42:57,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-03-03 18:42:57,037 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:57,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:57,037 INFO L85 PathProgramCache]: Analyzing trace with hash -288096149, now seen corresponding path program 169 times [2022-03-03 18:42:57,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:57,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369682857] [2022-03-03 18:42:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:57,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:57,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369682857] [2022-03-03 18:42:57,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369682857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:57,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190550811] [2022-03-03 18:42:57,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:42:57,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:57,160 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) [2022-03-03 18:42:57,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-03 18:42:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:57,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:57,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:57,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:57,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190550811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:57,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:57,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 24 [2022-03-03 18:42:57,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840904934] [2022-03-03 18:42:57,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:42:57,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:42:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:42:57,663 INFO L87 Difference]: Start difference. First operand 2176 states and 6687 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-03-03 18:42:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:58,065 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2022-03-03 18:42:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:42:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 [2022-03-03 18:42:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:58,069 INFO L225 Difference]: With dead ends: 2405 [2022-03-03 18:42:58,069 INFO L226 Difference]: Without dead ends: 2383 [2022-03-03 18:42:58,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:42:58,069 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 125 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:58,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 543 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2022-03-03 18:42:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2022-03-03 18:42:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2022-03-03 18:42:58,107 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2022-03-03 18:42:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:58,108 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2022-03-03 18:42:58,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-03-03 18:42:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2022-03-03 18:42:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:58,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:58,111 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:58,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-03 18:42:58,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:58,327 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash -321695377, now seen corresponding path program 170 times [2022-03-03 18:42:58,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:58,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205932935] [2022-03-03 18:42:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:58,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:58,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:58,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205932935] [2022-03-03 18:42:58,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205932935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:58,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939321579] [2022-03-03 18:42:58,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:42:58,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:58,462 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) [2022-03-03 18:42:58,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-03 18:42:58,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:42:58,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:58,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:58,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:42:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:58,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939321579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:42:58,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:42:58,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 23 [2022-03-03 18:42:58,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389901392] [2022-03-03 18:42:58,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:42:58,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:42:58,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:42:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:42:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:42:58,951 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:42:59,332 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2022-03-03 18:42:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:42:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 18:42:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:42:59,336 INFO L225 Difference]: With dead ends: 2338 [2022-03-03 18:42:59,336 INFO L226 Difference]: Without dead ends: 2331 [2022-03-03 18:42:59,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:42:59,336 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:42:59,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 499 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:42:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2022-03-03 18:42:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2022-03-03 18:42:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2022-03-03 18:42:59,372 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2022-03-03 18:42:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:42:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2022-03-03 18:42:59,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:42:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2022-03-03 18:42:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:42:59,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:42:59,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:42:59,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-03 18:42:59,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:59,575 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:42:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:42:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 705937345, now seen corresponding path program 171 times [2022-03-03 18:42:59,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:42:59,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115021299] [2022-03-03 18:42:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:42:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:42:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:42:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:42:59,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:42:59,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115021299] [2022-03-03 18:42:59,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115021299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:42:59,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055962536] [2022-03-03 18:42:59,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:42:59,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:42:59,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:42:59,713 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) [2022-03-03 18:42:59,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-03 18:42:59,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:42:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:42:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:42:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:42:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:42:59,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:00,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055962536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:00,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:00,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-03-03 18:43:00,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668682069] [2022-03-03 18:43:00,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:00,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:43:00,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:43:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:43:00,216 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-03-03 18:43:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:00,496 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2022-03-03 18:43:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:43:00,497 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 [2022-03-03 18:43:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:00,500 INFO L225 Difference]: With dead ends: 2327 [2022-03-03 18:43:00,500 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 18:43:00,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:00,500 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:00,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 386 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 18:43:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2022-03-03 18:43:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.0686138154844693) internal successors, (6619), 2157 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2022-03-03 18:43:00,527 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2022-03-03 18:43:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:00,527 INFO L470 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2022-03-03 18:43:00,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-03-03 18:43:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2022-03-03 18:43:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:00,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:00,529 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:00,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:00,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:00,733 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:00,734 INFO L85 PathProgramCache]: Analyzing trace with hash 768401063, now seen corresponding path program 172 times [2022-03-03 18:43:00,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:00,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369630955] [2022-03-03 18:43:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:00,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:00,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:00,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369630955] [2022-03-03 18:43:00,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369630955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:00,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520943077] [2022-03-03 18:43:00,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:00,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:00,873 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) [2022-03-03 18:43:00,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-03 18:43:00,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:01,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:01,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520943077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:01,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:01,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 26 [2022-03-03 18:43:01,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071486844] [2022-03-03 18:43:01,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:01,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:43:01,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:43:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:43:01,387 INFO L87 Difference]: Start difference. First operand 2158 states and 6619 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-03-03 18:43:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:01,833 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2022-03-03 18:43:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:43:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 [2022-03-03 18:43:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:01,837 INFO L225 Difference]: With dead ends: 2518 [2022-03-03 18:43:01,837 INFO L226 Difference]: Without dead ends: 2501 [2022-03-03 18:43:01,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:43:01,837 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 135 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:01,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 737 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:43:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2022-03-03 18:43:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2022-03-03 18:43:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 3.084070796460177) internal successors, (6970), 2260 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2022-03-03 18:43:01,865 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2022-03-03 18:43:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:01,866 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2022-03-03 18:43:01,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-03-03 18:43:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2022-03-03 18:43:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:01,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:01,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:01,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-03 18:43:02,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:02,070 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1911863509, now seen corresponding path program 173 times [2022-03-03 18:43:02,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:02,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453195795] [2022-03-03 18:43:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:02,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:02,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453195795] [2022-03-03 18:43:02,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453195795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:02,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788513908] [2022-03-03 18:43:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:02,189 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) [2022-03-03 18:43:02,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-03 18:43:02,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:43:02,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:02,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:02,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788513908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:02,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:02,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2022-03-03 18:43:02,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307015777] [2022-03-03 18:43:02,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:02,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:43:02,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:43:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:43:02,694 INFO L87 Difference]: Start difference. First operand 2261 states and 6970 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-03-03 18:43:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:03,135 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2022-03-03 18:43:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:43:03,136 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 [2022-03-03 18:43:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:03,140 INFO L225 Difference]: With dead ends: 2516 [2022-03-03 18:43:03,140 INFO L226 Difference]: Without dead ends: 2498 [2022-03-03 18:43:03,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:03,140 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:03,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 748 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2022-03-03 18:43:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2022-03-03 18:43:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.0744728577837597) internal successors, (6853), 2229 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2022-03-03 18:43:03,169 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2022-03-03 18:43:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:03,169 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2022-03-03 18:43:03,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-03-03 18:43:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2022-03-03 18:43:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:03,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:03,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:03,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-03 18:43:03,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:03,372 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 303809959, now seen corresponding path program 174 times [2022-03-03 18:43:03,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:03,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202575038] [2022-03-03 18:43:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:03,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:03,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202575038] [2022-03-03 18:43:03,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202575038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:03,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025446249] [2022-03-03 18:43:03,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:03,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:03,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:03,526 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) [2022-03-03 18:43:03,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-03 18:43:03,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:43:03,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:03,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:03,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:04,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025446249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:04,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:04,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 24 [2022-03-03 18:43:04,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736258374] [2022-03-03 18:43:04,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:04,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:43:04,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:43:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:43:04,097 INFO L87 Difference]: Start difference. First operand 2230 states and 6853 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:04,568 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2022-03-03 18:43:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:43:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 18:43:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:04,572 INFO L225 Difference]: With dead ends: 2507 [2022-03-03 18:43:04,572 INFO L226 Difference]: Without dead ends: 2485 [2022-03-03 18:43:04,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:04,572 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 146 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:04,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 711 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:43:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-03-03 18:43:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2022-03-03 18:43:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.0699458483754514) internal successors, (6803), 2216 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2022-03-03 18:43:04,627 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2022-03-03 18:43:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:04,627 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2022-03-03 18:43:04,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2022-03-03 18:43:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:04,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:04,629 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:04,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-03 18:43:04,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:04,830 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 270210731, now seen corresponding path program 175 times [2022-03-03 18:43:04,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:04,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310138669] [2022-03-03 18:43:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:04,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:04,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310138669] [2022-03-03 18:43:04,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310138669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:04,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852683456] [2022-03-03 18:43:04,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:04,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:04,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:04,957 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) [2022-03-03 18:43:04,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-03 18:43:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:05,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:05,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852683456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:05,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:05,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 23 [2022-03-03 18:43:05,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622952853] [2022-03-03 18:43:05,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:05,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:43:05,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:43:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:43:05,425 INFO L87 Difference]: Start difference. First operand 2217 states and 6803 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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) [2022-03-03 18:43:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:05,922 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2022-03-03 18:43:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:43:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 [2022-03-03 18:43:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:05,927 INFO L225 Difference]: With dead ends: 2454 [2022-03-03 18:43:05,927 INFO L226 Difference]: Without dead ends: 2428 [2022-03-03 18:43:05,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:05,927 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 103 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:05,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 631 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:43:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-03-03 18:43:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2022-03-03 18:43:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.068934240362812) internal successors, (6767), 2205 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2022-03-03 18:43:05,957 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2022-03-03 18:43:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:05,957 INFO L470 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2022-03-03 18:43:05,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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) [2022-03-03 18:43:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2022-03-03 18:43:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:05,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:05,960 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:05,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-03 18:43:06,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-03 18:43:06,161 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash -771365337, now seen corresponding path program 176 times [2022-03-03 18:43:06,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:06,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820091399] [2022-03-03 18:43:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:06,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:06,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:06,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820091399] [2022-03-03 18:43:06,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820091399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:06,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210828174] [2022-03-03 18:43:06,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:06,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:06,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:06,292 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) [2022-03-03 18:43:06,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-03 18:43:06,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:06,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:06,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:06,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:06,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210828174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:06,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:06,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-03-03 18:43:06,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504203294] [2022-03-03 18:43:06,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:06,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:43:06,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:43:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:43:06,769 INFO L87 Difference]: Start difference. First operand 2206 states and 6767 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:07,224 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2022-03-03 18:43:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:43:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:07,229 INFO L225 Difference]: With dead ends: 2375 [2022-03-03 18:43:07,229 INFO L226 Difference]: Without dead ends: 2368 [2022-03-03 18:43:07,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:07,229 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:07,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 587 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:43:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2022-03-03 18:43:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2022-03-03 18:43:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.067512460353421) internal successors, (6770), 2207 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2022-03-03 18:43:07,257 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2022-03-03 18:43:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:07,257 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2022-03-03 18:43:07,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2022-03-03 18:43:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:07,259 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:07,259 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:07,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-03 18:43:07,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-03 18:43:07,460 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:07,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2111325563, now seen corresponding path program 177 times [2022-03-03 18:43:07,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:07,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939719223] [2022-03-03 18:43:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:07,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:07,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939719223] [2022-03-03 18:43:07,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939719223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:07,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183550124] [2022-03-03 18:43:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:07,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:07,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:07,584 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) [2022-03-03 18:43:07,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-03 18:43:07,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:43:07,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:07,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:08,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183550124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:08,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:08,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-03-03 18:43:08,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20906001] [2022-03-03 18:43:08,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:08,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:43:08,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:43:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:43:08,144 INFO L87 Difference]: Start difference. First operand 2208 states and 6770 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-03-03 18:43:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:08,367 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2022-03-03 18:43:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:43:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 [2022-03-03 18:43:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:08,371 INFO L225 Difference]: With dead ends: 2298 [2022-03-03 18:43:08,371 INFO L226 Difference]: Without dead ends: 2285 [2022-03-03 18:43:08,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:08,371 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:08,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 281 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:08,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-03-03 18:43:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2022-03-03 18:43:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.0674259681093394) internal successors, (6733), 2195 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2022-03-03 18:43:08,399 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2022-03-03 18:43:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:08,399 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2022-03-03 18:43:08,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-03-03 18:43:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2022-03-03 18:43:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:08,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:08,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:08,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-03 18:43:08,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-03 18:43:08,615 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1937621227, now seen corresponding path program 178 times [2022-03-03 18:43:08,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:08,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906921423] [2022-03-03 18:43:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:08,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:08,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:08,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906921423] [2022-03-03 18:43:08,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906921423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:08,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522965008] [2022-03-03 18:43:08,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:08,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:08,759 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) [2022-03-03 18:43:08,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-03 18:43:08,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:08,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:08,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:08,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:08,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:09,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522965008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:09,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:09,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-03 18:43:09,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897647914] [2022-03-03 18:43:09,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:09,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:43:09,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:09,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:43:09,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:43:09,269 INFO L87 Difference]: Start difference. First operand 2196 states and 6733 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:09,657 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2022-03-03 18:43:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:43:09,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:09,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:09,661 INFO L225 Difference]: With dead ends: 2566 [2022-03-03 18:43:09,661 INFO L226 Difference]: Without dead ends: 2549 [2022-03-03 18:43:09,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:09,661 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 178 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:09,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 575 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-03-03 18:43:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2022-03-03 18:43:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.072438919845692) internal successors, (7168), 2333 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2022-03-03 18:43:09,691 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2022-03-03 18:43:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:09,691 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2022-03-03 18:43:09,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2022-03-03 18:43:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:09,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:09,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:09,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:09,895 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,SelfDestructingSolverStorable191 [2022-03-03 18:43:09,895 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash -742643345, now seen corresponding path program 179 times [2022-03-03 18:43:09,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:09,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872191043] [2022-03-03 18:43:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:10,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:10,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872191043] [2022-03-03 18:43:10,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872191043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:10,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811103958] [2022-03-03 18:43:10,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:10,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:10,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:10,026 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) [2022-03-03 18:43:10,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-03 18:43:10,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:43:10,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:10,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:10,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811103958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:10,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:10,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-03 18:43:10,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919969329] [2022-03-03 18:43:10,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:10,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:43:10,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:43:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:43:10,520 INFO L87 Difference]: Start difference. First operand 2334 states and 7168 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-03-03 18:43:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:10,944 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2022-03-03 18:43:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:43:10,945 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 [2022-03-03 18:43:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:10,949 INFO L225 Difference]: With dead ends: 2564 [2022-03-03 18:43:10,949 INFO L226 Difference]: Without dead ends: 2548 [2022-03-03 18:43:10,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:10,949 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 142 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:10,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 721 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-03-03 18:43:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2022-03-03 18:43:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 3.066983578219533) internal successors, (7097), 2314 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2022-03-03 18:43:10,978 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2022-03-03 18:43:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:10,978 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2022-03-03 18:43:10,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-03-03 18:43:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2022-03-03 18:43:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:10,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:10,981 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:10,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-03 18:43:11,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:11,182 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1473030123, now seen corresponding path program 180 times [2022-03-03 18:43:11,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:11,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662362170] [2022-03-03 18:43:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:11,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:11,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662362170] [2022-03-03 18:43:11,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662362170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:11,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506111436] [2022-03-03 18:43:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:11,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:11,309 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) [2022-03-03 18:43:11,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-03 18:43:11,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:43:11,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:11,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:11,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506111436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:11,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:11,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-03 18:43:11,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431667488] [2022-03-03 18:43:11,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:43:11,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:43:11,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:43:11,793 INFO L87 Difference]: Start difference. First operand 2315 states and 7097 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:12,230 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2022-03-03 18:43:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:43:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:12,234 INFO L225 Difference]: With dead ends: 2571 [2022-03-03 18:43:12,235 INFO L226 Difference]: Without dead ends: 2553 [2022-03-03 18:43:12,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:12,235 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 152 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:12,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 661 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2022-03-03 18:43:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2022-03-03 18:43:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.0610287707061903) internal successors, (7022), 2294 states have internal predecessors, (7022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2022-03-03 18:43:12,267 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2022-03-03 18:43:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:12,267 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2022-03-03 18:43:12,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2022-03-03 18:43:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:12,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:12,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:12,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-03 18:43:12,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:12,470 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1439430895, now seen corresponding path program 181 times [2022-03-03 18:43:12,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:12,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662545631] [2022-03-03 18:43:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:12,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:12,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662545631] [2022-03-03 18:43:12,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662545631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:12,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814859015] [2022-03-03 18:43:12,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:12,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:12,616 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) [2022-03-03 18:43:12,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-03 18:43:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:12,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:13,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814859015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:13,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:13,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-03 18:43:13,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644657569] [2022-03-03 18:43:13,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:13,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:43:13,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:43:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:43:13,169 INFO L87 Difference]: Start difference. First operand 2295 states and 7022 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:13,644 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2022-03-03 18:43:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:43:13,645 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:13,649 INFO L225 Difference]: With dead ends: 2576 [2022-03-03 18:43:13,649 INFO L226 Difference]: Without dead ends: 2556 [2022-03-03 18:43:13,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:13,649 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 132 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:13,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 657 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:43:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-03-03 18:43:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2022-03-03 18:43:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.0567032967032968) internal successors, (6954), 2275 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2022-03-03 18:43:13,687 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2022-03-03 18:43:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:13,687 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2022-03-03 18:43:13,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2022-03-03 18:43:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:13,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:13,690 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:13,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-03 18:43:13,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:13,890 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash 397854827, now seen corresponding path program 182 times [2022-03-03 18:43:13,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:13,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315027440] [2022-03-03 18:43:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:14,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:14,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315027440] [2022-03-03 18:43:14,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315027440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:14,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75637090] [2022-03-03 18:43:14,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:14,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:14,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:14,026 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) [2022-03-03 18:43:14,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-03 18:43:14,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:14,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:14,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75637090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:14,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:14,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-03-03 18:43:14,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237785329] [2022-03-03 18:43:14,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:14,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:43:14,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:43:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:43:14,487 INFO L87 Difference]: Start difference. First operand 2276 states and 6954 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-03-03 18:43:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:15,010 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2022-03-03 18:43:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:43:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 21 [2022-03-03 18:43:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:15,014 INFO L225 Difference]: With dead ends: 2488 [2022-03-03 18:43:15,014 INFO L226 Difference]: Without dead ends: 2466 [2022-03-03 18:43:15,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:15,014 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 101 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:15,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 622 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:43:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2022-03-03 18:43:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2022-03-03 18:43:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.0594235033259425) internal successors, (6899), 2255 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2022-03-03 18:43:15,042 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2022-03-03 18:43:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:15,042 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2022-03-03 18:43:15,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-03-03 18:43:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2022-03-03 18:43:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:15,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:15,045 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:15,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-03 18:43:15,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:15,246 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1826232209, now seen corresponding path program 183 times [2022-03-03 18:43:15,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:15,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851637363] [2022-03-03 18:43:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:15,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:15,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:15,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851637363] [2022-03-03 18:43:15,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851637363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:15,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330619029] [2022-03-03 18:43:15,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:15,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:15,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:15,404 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) [2022-03-03 18:43:15,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-03 18:43:15,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:43:15,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:15,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:15,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:15,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330619029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:15,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:15,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-03-03 18:43:15,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187389963] [2022-03-03 18:43:15,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:15,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:43:15,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:43:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:43:15,853 INFO L87 Difference]: Start difference. First operand 2256 states and 6899 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:16,288 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2022-03-03 18:43:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:43:16,288 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:16,292 INFO L225 Difference]: With dead ends: 2408 [2022-03-03 18:43:16,292 INFO L226 Difference]: Without dead ends: 2401 [2022-03-03 18:43:16,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:16,293 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 112 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:16,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 534 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-03-03 18:43:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2022-03-03 18:43:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 3.0525386313465783) internal successors, (6914), 2265 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2022-03-03 18:43:16,320 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2022-03-03 18:43:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:16,320 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2022-03-03 18:43:16,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2022-03-03 18:43:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:16,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:16,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:16,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-03 18:43:16,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:16,523 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash 176382699, now seen corresponding path program 184 times [2022-03-03 18:43:16,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:16,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798374068] [2022-03-03 18:43:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:16,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:16,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:16,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798374068] [2022-03-03 18:43:16,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798374068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:16,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472548290] [2022-03-03 18:43:16,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:16,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:16,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:16,657 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) [2022-03-03 18:43:16,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-03 18:43:16,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:16,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:16,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:16,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:17,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472548290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:17,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:17,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 26 [2022-03-03 18:43:17,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91534505] [2022-03-03 18:43:17,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:17,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:43:17,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:17,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:43:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:43:17,185 INFO L87 Difference]: Start difference. First operand 2266 states and 6914 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:17,481 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2022-03-03 18:43:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:43:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:17,485 INFO L225 Difference]: With dead ends: 2482 [2022-03-03 18:43:17,485 INFO L226 Difference]: Without dead ends: 2472 [2022-03-03 18:43:17,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:17,485 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:17,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 465 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2022-03-03 18:43:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2022-03-03 18:43:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.0584642233856894) internal successors, (7010), 2292 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2022-03-03 18:43:17,523 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2022-03-03 18:43:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:17,523 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2022-03-03 18:43:17,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2022-03-03 18:43:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:17,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:17,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:17,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-03 18:43:17,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:17,726 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:17,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1791085423, now seen corresponding path program 185 times [2022-03-03 18:43:17,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:17,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204035379] [2022-03-03 18:43:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:17,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:17,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:17,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204035379] [2022-03-03 18:43:17,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204035379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:17,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656216281] [2022-03-03 18:43:17,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:17,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:17,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:17,844 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) [2022-03-03 18:43:17,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-03 18:43:17,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:43:17,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:18,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:18,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656216281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:18,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:18,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 25 [2022-03-03 18:43:18,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959421166] [2022-03-03 18:43:18,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:18,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:43:18,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:43:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:43:18,358 INFO L87 Difference]: Start difference. First operand 2293 states and 7010 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-03-03 18:43:18,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:18,641 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2022-03-03 18:43:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:43:18,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 [2022-03-03 18:43:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:18,645 INFO L225 Difference]: With dead ends: 2464 [2022-03-03 18:43:18,645 INFO L226 Difference]: Without dead ends: 2457 [2022-03-03 18:43:18,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:18,646 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:18,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 434 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:18,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2022-03-03 18:43:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2022-03-03 18:43:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.05764192139738) internal successors, (7002), 2290 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2022-03-03 18:43:18,680 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2022-03-03 18:43:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:18,680 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2022-03-03 18:43:18,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-03-03 18:43:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2022-03-03 18:43:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:18,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:18,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:18,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-03 18:43:18,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:18,884 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash 747837505, now seen corresponding path program 186 times [2022-03-03 18:43:18,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:18,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039238979] [2022-03-03 18:43:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:19,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:19,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039238979] [2022-03-03 18:43:19,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039238979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:19,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644994863] [2022-03-03 18:43:19,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:19,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:19,014 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) [2022-03-03 18:43:19,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-03 18:43:19,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:43:19,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:19,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:19,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644994863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:19,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:19,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-03-03 18:43:19,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146833498] [2022-03-03 18:43:19,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:19,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:43:19,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:43:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:43:19,568 INFO L87 Difference]: Start difference. First operand 2291 states and 7002 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:19,897 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2022-03-03 18:43:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:43:19,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 18:43:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:19,902 INFO L225 Difference]: With dead ends: 2417 [2022-03-03 18:43:19,902 INFO L226 Difference]: Without dead ends: 2410 [2022-03-03 18:43:19,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:19,902 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:19,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 508 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2022-03-03 18:43:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2022-03-03 18:43:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.0576671035386633) internal successors, (6999), 2289 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2022-03-03 18:43:19,937 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2022-03-03 18:43:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:19,937 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2022-03-03 18:43:19,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2022-03-03 18:43:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:19,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:19,940 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:19,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-03 18:43:20,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-03 18:43:20,141 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:20,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1412563179, now seen corresponding path program 187 times [2022-03-03 18:43:20,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:20,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608386236] [2022-03-03 18:43:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:20,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:20,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608386236] [2022-03-03 18:43:20,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608386236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:20,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064186504] [2022-03-03 18:43:20,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:20,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:20,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:20,268 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) [2022-03-03 18:43:20,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-03 18:43:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:20,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:20,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064186504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:20,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:20,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 26 [2022-03-03 18:43:20,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834143577] [2022-03-03 18:43:20,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:20,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:43:20,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:43:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:43:20,807 INFO L87 Difference]: Start difference. First operand 2290 states and 6999 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-03-03 18:43:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:21,128 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2022-03-03 18:43:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:43:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 [2022-03-03 18:43:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:21,133 INFO L225 Difference]: With dead ends: 2563 [2022-03-03 18:43:21,133 INFO L226 Difference]: Without dead ends: 2553 [2022-03-03 18:43:21,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:21,133 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:21,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 463 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2022-03-03 18:43:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2022-03-03 18:43:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.06480686695279) internal successors, (7141), 2330 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2022-03-03 18:43:21,171 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2022-03-03 18:43:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:21,172 INFO L470 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2022-03-03 18:43:21,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-03-03 18:43:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2022-03-03 18:43:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:21,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:21,175 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:21,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:21,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-03 18:43:21,376 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:21,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1267701393, now seen corresponding path program 188 times [2022-03-03 18:43:21,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:21,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657808599] [2022-03-03 18:43:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:21,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:21,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657808599] [2022-03-03 18:43:21,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657808599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:21,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247651115] [2022-03-03 18:43:21,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:21,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:21,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:21,495 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) [2022-03-03 18:43:21,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-03 18:43:21,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:21,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:21,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:22,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247651115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:22,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:22,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 25 [2022-03-03 18:43:22,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001229021] [2022-03-03 18:43:22,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:22,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:43:22,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:22,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:43:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:43:22,017 INFO L87 Difference]: Start difference. First operand 2331 states and 7141 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-03-03 18:43:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:22,367 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2022-03-03 18:43:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:43:22,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 [2022-03-03 18:43:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:22,372 INFO L225 Difference]: With dead ends: 2544 [2022-03-03 18:43:22,372 INFO L226 Difference]: Without dead ends: 2537 [2022-03-03 18:43:22,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:43:22,372 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:22,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 527 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-03-03 18:43:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2022-03-03 18:43:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.063601203266008) internal successors, (7129), 2327 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2022-03-03 18:43:22,409 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2022-03-03 18:43:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:22,409 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2022-03-03 18:43:22,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-03-03 18:43:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2022-03-03 18:43:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:22,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:22,413 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:22,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:22,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:22,613 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:22,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1984017985, now seen corresponding path program 189 times [2022-03-03 18:43:22,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:22,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831743005] [2022-03-03 18:43:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:22,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:22,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:22,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831743005] [2022-03-03 18:43:22,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831743005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:22,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462901621] [2022-03-03 18:43:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:22,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:22,746 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) [2022-03-03 18:43:22,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-03 18:43:22,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:43:22,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:22,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:23,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462901621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:23,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:23,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 24 [2022-03-03 18:43:23,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491488746] [2022-03-03 18:43:23,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:23,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:43:23,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:43:23,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:43:23,287 INFO L87 Difference]: Start difference. First operand 2328 states and 7129 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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) [2022-03-03 18:43:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:23,671 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2022-03-03 18:43:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:43:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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 [2022-03-03 18:43:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:23,675 INFO L225 Difference]: With dead ends: 2523 [2022-03-03 18:43:23,675 INFO L226 Difference]: Without dead ends: 2510 [2022-03-03 18:43:23,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:43:23,676 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 123 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:23,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 541 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2022-03-03 18:43:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2022-03-03 18:43:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.0614261168384878) internal successors, (7127), 2328 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2022-03-03 18:43:23,714 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2022-03-03 18:43:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:23,715 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2022-03-03 18:43:23,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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) [2022-03-03 18:43:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2022-03-03 18:43:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:23,717 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:23,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:23,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-03 18:43:23,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-03 18:43:23,918 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1775719509, now seen corresponding path program 190 times [2022-03-03 18:43:23,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:23,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223336389] [2022-03-03 18:43:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:23,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:24,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:24,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223336389] [2022-03-03 18:43:24,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223336389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:24,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213372226] [2022-03-03 18:43:24,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:24,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:24,049 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) [2022-03-03 18:43:24,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-03 18:43:24,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:24,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:24,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:24,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:24,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213372226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:24,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:24,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 23 [2022-03-03 18:43:24,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339838911] [2022-03-03 18:43:24,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:24,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:43:24,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:43:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:43:24,569 INFO L87 Difference]: Start difference. First operand 2329 states and 7127 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:24,922 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2022-03-03 18:43:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:43:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:24,927 INFO L225 Difference]: With dead ends: 2467 [2022-03-03 18:43:24,927 INFO L226 Difference]: Without dead ends: 2460 [2022-03-03 18:43:24,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:24,927 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:24,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 442 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2022-03-03 18:43:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2022-03-03 18:43:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 3.0614789337919173) internal successors, (7121), 2326 states have internal predecessors, (7121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2022-03-03 18:43:24,964 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2022-03-03 18:43:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:24,964 INFO L470 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2022-03-03 18:43:24,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2022-03-03 18:43:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:24,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:24,968 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:24,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-03 18:43:25,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-03-03 18:43:25,169 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:25,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1300338723, now seen corresponding path program 191 times [2022-03-03 18:43:25,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:25,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823494081] [2022-03-03 18:43:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:25,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:25,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823494081] [2022-03-03 18:43:25,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823494081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:25,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998335513] [2022-03-03 18:43:25,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:25,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:25,302 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) [2022-03-03 18:43:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-03 18:43:25,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:43:25,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:25,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:25,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:25,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:25,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998335513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:25,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:25,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 23 [2022-03-03 18:43:25,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325944208] [2022-03-03 18:43:25,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:25,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:43:25,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:43:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:43:25,824 INFO L87 Difference]: Start difference. First operand 2327 states and 7121 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:26,119 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2022-03-03 18:43:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:43:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:26,123 INFO L225 Difference]: With dead ends: 2438 [2022-03-03 18:43:26,123 INFO L226 Difference]: Without dead ends: 2422 [2022-03-03 18:43:26,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:26,124 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:26,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 326 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2022-03-03 18:43:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2022-03-03 18:43:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.0617443868739205) internal successors, (7091), 2316 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2022-03-03 18:43:26,160 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2022-03-03 18:43:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:26,160 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2022-03-03 18:43:26,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2022-03-03 18:43:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:26,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:26,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:26,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-03 18:43:26,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-03 18:43:26,364 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1079452395, now seen corresponding path program 192 times [2022-03-03 18:43:26,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:26,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575072461] [2022-03-03 18:43:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:26,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:26,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:26,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575072461] [2022-03-03 18:43:26,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575072461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:26,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737163002] [2022-03-03 18:43:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:26,488 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) [2022-03-03 18:43:26,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-03 18:43:26,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:43:26,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:26,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:27,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737163002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:27,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:27,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 26 [2022-03-03 18:43:27,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090692434] [2022-03-03 18:43:27,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:27,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:43:27,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:43:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:43:27,019 INFO L87 Difference]: Start difference. First operand 2317 states and 7091 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-03-03 18:43:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:27,371 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2022-03-03 18:43:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:43:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 [2022-03-03 18:43:27,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:27,376 INFO L225 Difference]: With dead ends: 2637 [2022-03-03 18:43:27,376 INFO L226 Difference]: Without dead ends: 2627 [2022-03-03 18:43:27,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:27,377 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:27,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 517 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2022-03-03 18:43:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2022-03-03 18:43:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.0697969543147208) internal successors, (7257), 2364 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2022-03-03 18:43:27,415 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2022-03-03 18:43:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:27,415 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2022-03-03 18:43:27,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-03-03 18:43:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2022-03-03 18:43:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:27,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:27,419 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:27,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:27,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-03 18:43:27,620 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1600812177, now seen corresponding path program 193 times [2022-03-03 18:43:27,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:27,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075784211] [2022-03-03 18:43:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:27,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:27,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:27,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075784211] [2022-03-03 18:43:27,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075784211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:27,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990164452] [2022-03-03 18:43:27,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:27,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:27,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:27,744 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) [2022-03-03 18:43:27,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-03 18:43:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:27,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:28,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990164452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:28,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:28,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2022-03-03 18:43:28,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928544245] [2022-03-03 18:43:28,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:43:28,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:43:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:43:28,246 INFO L87 Difference]: Start difference. First operand 2365 states and 7257 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:28,582 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2022-03-03 18:43:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:43:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 18:43:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:28,587 INFO L225 Difference]: With dead ends: 2621 [2022-03-03 18:43:28,588 INFO L226 Difference]: Without dead ends: 2614 [2022-03-03 18:43:28,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:43:28,588 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 192 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:28,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 473 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2022-03-03 18:43:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2022-03-03 18:43:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.068731438268986) internal successors, (7233), 2357 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2022-03-03 18:43:28,633 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2022-03-03 18:43:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:28,633 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2022-03-03 18:43:28,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2022-03-03 18:43:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:28,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:28,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:28,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-03 18:43:28,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:28,838 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:28,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:28,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1650907201, now seen corresponding path program 194 times [2022-03-03 18:43:28,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:28,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031180979] [2022-03-03 18:43:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:28,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:28,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:28,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031180979] [2022-03-03 18:43:28,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031180979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:28,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366181918] [2022-03-03 18:43:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:28,959 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) [2022-03-03 18:43:28,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-03 18:43:28,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:28,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:29,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:29,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366181918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:29,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:29,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 24 [2022-03-03 18:43:29,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610035996] [2022-03-03 18:43:29,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:29,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:43:29,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:29,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:43:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:43:29,473 INFO L87 Difference]: Start difference. First operand 2358 states and 7233 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:29,844 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2022-03-03 18:43:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:43:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:29,849 INFO L225 Difference]: With dead ends: 2635 [2022-03-03 18:43:29,849 INFO L226 Difference]: Without dead ends: 2622 [2022-03-03 18:43:29,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:43:29,850 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 178 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:29,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 483 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2022-03-03 18:43:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2022-03-03 18:43:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.0671197960917587) internal successors, (7220), 2354 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2022-03-03 18:43:29,889 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2022-03-03 18:43:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:29,889 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2022-03-03 18:43:29,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2022-03-03 18:43:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:29,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:29,893 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:29,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-03 18:43:30,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:30,093 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2108830293, now seen corresponding path program 195 times [2022-03-03 18:43:30,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:30,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612393597] [2022-03-03 18:43:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:30,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:30,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612393597] [2022-03-03 18:43:30,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612393597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:30,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115092173] [2022-03-03 18:43:30,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:30,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:30,224 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) [2022-03-03 18:43:30,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-03 18:43:30,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:43:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:30,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:30,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115092173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:30,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:30,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 23 [2022-03-03 18:43:30,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424275519] [2022-03-03 18:43:30,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:30,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:43:30,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:43:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:43:30,735 INFO L87 Difference]: Start difference. First operand 2355 states and 7220 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:31,171 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2022-03-03 18:43:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:43:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:43:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:31,176 INFO L225 Difference]: With dead ends: 2598 [2022-03-03 18:43:31,176 INFO L226 Difference]: Without dead ends: 2582 [2022-03-03 18:43:31,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:43:31,177 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 124 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:31,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 548 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-03-03 18:43:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2022-03-03 18:43:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.0659293917481922) internal successors, (7208), 2351 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2022-03-03 18:43:31,215 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2022-03-03 18:43:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:31,216 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2022-03-03 18:43:31,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2022-03-03 18:43:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 18:43:31,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:31,219 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:31,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:31,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:31,420 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:31,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1598391681, now seen corresponding path program 196 times [2022-03-03 18:43:31,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:31,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997119438] [2022-03-03 18:43:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:31,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:31,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:31,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997119438] [2022-03-03 18:43:31,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997119438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:31,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857043045] [2022-03-03 18:43:31,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:31,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:31,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:31,560 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) [2022-03-03 18:43:31,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-03 18:43:31,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:31,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 18:43:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:31,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:32,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857043045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:32,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:32,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-03-03 18:43:32,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724697577] [2022-03-03 18:43:32,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:32,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:43:32,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:43:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:43:32,116 INFO L87 Difference]: Start difference. First operand 2352 states and 7208 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-03-03 18:43:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:32,519 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2022-03-03 18:43:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:43:32,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 21 [2022-03-03 18:43:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:32,523 INFO L225 Difference]: With dead ends: 2537 [2022-03-03 18:43:32,524 INFO L226 Difference]: Without dead ends: 2530 [2022-03-03 18:43:32,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:43:32,524 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 111 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:32,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 480 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:43:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2022-03-03 18:43:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2022-03-03 18:43:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.066013628620102) internal successors, (7199), 2348 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2022-03-03 18:43:32,577 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2022-03-03 18:43:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:32,577 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2022-03-03 18:43:32,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-03-03 18:43:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2022-03-03 18:43:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:32,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:32,581 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:32,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-03 18:43:32,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:32,781 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:32,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:32,781 INFO L85 PathProgramCache]: Analyzing trace with hash -252562425, now seen corresponding path program 197 times [2022-03-03 18:43:32,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:32,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281095897] [2022-03-03 18:43:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:32,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:32,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:32,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281095897] [2022-03-03 18:43:32,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281095897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:32,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352957005] [2022-03-03 18:43:32,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:32,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:32,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:32,842 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) [2022-03-03 18:43:32,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-03 18:43:32,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:43:32,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:32,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:32,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352957005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:32,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:32,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-03-03 18:43:32,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253403318] [2022-03-03 18:43:32,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:32,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:43:32,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:43:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:43:33,000 INFO L87 Difference]: Start difference. First operand 2349 states and 7199 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:33,190 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2022-03-03 18:43:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:43:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:33,197 INFO L225 Difference]: With dead ends: 3357 [2022-03-03 18:43:33,197 INFO L226 Difference]: Without dead ends: 3337 [2022-03-03 18:43:33,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:43:33,198 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:33,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 97 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:43:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2022-03-03 18:43:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2022-03-03 18:43:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.0682885189927442) internal successors, (7189), 2343 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2022-03-03 18:43:33,243 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2022-03-03 18:43:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:33,243 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2022-03-03 18:43:33,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2022-03-03 18:43:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:33,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:33,247 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:33,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-03 18:43:33,447 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,SelfDestructingSolverStorable210 [2022-03-03 18:43:33,447 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1864225815, now seen corresponding path program 198 times [2022-03-03 18:43:33,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:33,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158514593] [2022-03-03 18:43:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:33,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:33,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158514593] [2022-03-03 18:43:33,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158514593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:33,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67133206] [2022-03-03 18:43:33,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:33,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:33,521 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) [2022-03-03 18:43:33,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-03 18:43:33,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:43:33,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:33,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:33,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67133206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:33,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:33,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-03-03 18:43:33,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134713137] [2022-03-03 18:43:33,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:43:33,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:43:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:43:33,693 INFO L87 Difference]: Start difference. First operand 2344 states and 7189 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:33,939 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2022-03-03 18:43:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:43:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:33,947 INFO L225 Difference]: With dead ends: 3420 [2022-03-03 18:43:33,947 INFO L226 Difference]: Without dead ends: 3420 [2022-03-03 18:43:33,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:43:33,948 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:33,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 170 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2022-03-03 18:43:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2022-03-03 18:43:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.0670297444490995) internal successors, (7321), 2387 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2022-03-03 18:43:33,994 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2022-03-03 18:43:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:33,994 INFO L470 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2022-03-03 18:43:33,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2022-03-03 18:43:33,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:33,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:33,998 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:34,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-03 18:43:34,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-03 18:43:34,198 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:34,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:34,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1042764981, now seen corresponding path program 199 times [2022-03-03 18:43:34,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:34,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037387612] [2022-03-03 18:43:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:34,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:34,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:34,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037387612] [2022-03-03 18:43:34,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037387612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:34,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411490397] [2022-03-03 18:43:34,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:34,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:34,273 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) [2022-03-03 18:43:34,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-03 18:43:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:34,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:34,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:34,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411490397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:34,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:34,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:34,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434182484] [2022-03-03 18:43:34,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:34,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:34,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:34,450 INFO L87 Difference]: Start difference. First operand 2388 states and 7321 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:35,037 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2022-03-03 18:43:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 18:43:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:35,045 INFO L225 Difference]: With dead ends: 4110 [2022-03-03 18:43:35,045 INFO L226 Difference]: Without dead ends: 4102 [2022-03-03 18:43:35,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:43:35,046 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 247 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:35,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 207 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-03 18:43:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2022-03-03 18:43:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.1119773210489017) internal successors, (8782), 2822 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2022-03-03 18:43:35,114 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2022-03-03 18:43:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:35,114 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2022-03-03 18:43:35,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2022-03-03 18:43:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:35,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:35,118 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:35,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-03-03 18:43:35,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-03 18:43:35,319 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -471310175, now seen corresponding path program 200 times [2022-03-03 18:43:35,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:35,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854528936] [2022-03-03 18:43:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:35,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:35,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854528936] [2022-03-03 18:43:35,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854528936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:35,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289025652] [2022-03-03 18:43:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:35,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:35,379 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) [2022-03-03 18:43:35,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-03 18:43:35,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:35,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:35,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:35,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289025652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:35,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:35,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:35,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55899887] [2022-03-03 18:43:35,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:35,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:35,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:35,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:35,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:35,535 INFO L87 Difference]: Start difference. First operand 2823 states and 8782 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:36,110 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2022-03-03 18:43:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 18:43:36,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:36,118 INFO L225 Difference]: With dead ends: 4077 [2022-03-03 18:43:36,118 INFO L226 Difference]: Without dead ends: 4071 [2022-03-03 18:43:36,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 18:43:36,119 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 168 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:36,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 201 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2022-03-03 18:43:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2022-03-03 18:43:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.0726172465960664) internal successors, (8124), 2644 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2022-03-03 18:43:36,183 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2022-03-03 18:43:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:36,183 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2022-03-03 18:43:36,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2022-03-03 18:43:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:36,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:36,186 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:36,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:36,386 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,SelfDestructingSolverStorable213 [2022-03-03 18:43:36,387 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1892085575, now seen corresponding path program 201 times [2022-03-03 18:43:36,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:36,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698804186] [2022-03-03 18:43:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:36,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:36,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:36,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698804186] [2022-03-03 18:43:36,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698804186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:36,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497929390] [2022-03-03 18:43:36,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:36,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:36,452 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) [2022-03-03 18:43:36,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-03 18:43:36,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:43:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:36,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:36,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:36,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:36,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497929390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:36,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:36,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:36,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600520148] [2022-03-03 18:43:36,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:36,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:36,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:36,606 INFO L87 Difference]: Start difference. First operand 2645 states and 8124 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:37,195 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2022-03-03 18:43:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:43:37,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:37,201 INFO L225 Difference]: With dead ends: 3589 [2022-03-03 18:43:37,202 INFO L226 Difference]: Without dead ends: 3589 [2022-03-03 18:43:37,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 18:43:37,202 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 174 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:37,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 194 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-03-03 18:43:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2022-03-03 18:43:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 3.094017094017094) internal successors, (8688), 2808 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2022-03-03 18:43:37,269 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2022-03-03 18:43:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:37,269 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2022-03-03 18:43:37,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2022-03-03 18:43:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:37,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:37,273 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:37,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-03 18:43:37,474 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,SelfDestructingSolverStorable214 [2022-03-03 18:43:37,474 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:37,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1427494471, now seen corresponding path program 202 times [2022-03-03 18:43:37,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:37,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831294879] [2022-03-03 18:43:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:37,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:37,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:37,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831294879] [2022-03-03 18:43:37,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831294879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:37,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546507317] [2022-03-03 18:43:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:37,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:37,534 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) [2022-03-03 18:43:37,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-03 18:43:37,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:37,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:37,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:37,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:37,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546507317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:37,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:37,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:37,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746029777] [2022-03-03 18:43:37,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:37,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:37,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:37,687 INFO L87 Difference]: Start difference. First operand 2809 states and 8688 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:38,297 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2022-03-03 18:43:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:43:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:38,304 INFO L225 Difference]: With dead ends: 3314 [2022-03-03 18:43:38,304 INFO L226 Difference]: Without dead ends: 3310 [2022-03-03 18:43:38,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 18:43:38,305 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:38,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 160 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2022-03-03 18:43:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2022-03-03 18:43:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 3.0532168387609215) internal successors, (7688), 2518 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2022-03-03 18:43:38,353 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2022-03-03 18:43:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:38,353 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2022-03-03 18:43:38,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2022-03-03 18:43:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:38,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:38,357 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:38,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-03 18:43:38,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:38,557 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:38,557 INFO L85 PathProgramCache]: Analyzing trace with hash 63919627, now seen corresponding path program 203 times [2022-03-03 18:43:38,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:38,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166337495] [2022-03-03 18:43:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:38,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:38,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:38,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166337495] [2022-03-03 18:43:38,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166337495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:38,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215722660] [2022-03-03 18:43:38,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:38,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:38,617 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) [2022-03-03 18:43:38,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-03 18:43:38,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:43:38,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:38,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:38,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:38,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:38,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215722660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:38,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:38,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:38,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254659570] [2022-03-03 18:43:38,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:38,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:38,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:38,781 INFO L87 Difference]: Start difference. First operand 2519 states and 7688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:39,293 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2022-03-03 18:43:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 18:43:39,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:39,300 INFO L225 Difference]: With dead ends: 3834 [2022-03-03 18:43:39,300 INFO L226 Difference]: Without dead ends: 3825 [2022-03-03 18:43:39,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 18:43:39,301 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:39,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 147 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2022-03-03 18:43:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2022-03-03 18:43:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.0544323483670297) internal successors, (7856), 2572 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2022-03-03 18:43:39,354 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2022-03-03 18:43:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:39,354 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2022-03-03 18:43:39,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2022-03-03 18:43:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:39,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:39,358 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:39,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:39,558 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,SelfDestructingSolverStorable216 [2022-03-03 18:43:39,558 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:39,558 INFO L85 PathProgramCache]: Analyzing trace with hash -523825695, now seen corresponding path program 204 times [2022-03-03 18:43:39,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:39,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801345050] [2022-03-03 18:43:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:39,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:39,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:39,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801345050] [2022-03-03 18:43:39,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801345050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:39,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039194051] [2022-03-03 18:43:39,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:39,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:39,617 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) [2022-03-03 18:43:39,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-03 18:43:39,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:43:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:39,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:39,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:39,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039194051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:39,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:39,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:39,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356268695] [2022-03-03 18:43:39,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:39,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:39,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:39,773 INFO L87 Difference]: Start difference. First operand 2573 states and 7856 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:40,261 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2022-03-03 18:43:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 18:43:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:40,268 INFO L225 Difference]: With dead ends: 3887 [2022-03-03 18:43:40,268 INFO L226 Difference]: Without dead ends: 3875 [2022-03-03 18:43:40,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 18:43:40,268 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 217 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:40,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 145 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2022-03-03 18:43:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2022-03-03 18:43:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 3.0543143297380584) internal successors, (7929), 2596 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2022-03-03 18:43:40,320 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2022-03-03 18:43:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:40,320 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2022-03-03 18:43:40,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2022-03-03 18:43:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:40,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:40,324 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:40,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-03 18:43:40,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-03 18:43:40,524 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:40,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1564061493, now seen corresponding path program 205 times [2022-03-03 18:43:40,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:40,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499122614] [2022-03-03 18:43:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:40,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:40,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:40,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499122614] [2022-03-03 18:43:40,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499122614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:40,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457400261] [2022-03-03 18:43:40,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:40,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:40,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:40,587 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) [2022-03-03 18:43:40,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-03 18:43:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:40,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:40,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457400261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:40,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:40,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:40,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127669274] [2022-03-03 18:43:40,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:40,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:40,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:40,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:40,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:40,747 INFO L87 Difference]: Start difference. First operand 2597 states and 7929 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:41,203 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2022-03-03 18:43:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:43:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:41,211 INFO L225 Difference]: With dead ends: 3976 [2022-03-03 18:43:41,211 INFO L226 Difference]: Without dead ends: 3961 [2022-03-03 18:43:41,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 18:43:41,212 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:41,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 181 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2022-03-03 18:43:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2022-03-03 18:43:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0478194338179034) internal successors, (7967), 2614 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2022-03-03 18:43:41,285 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2022-03-03 18:43:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:41,285 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2022-03-03 18:43:41,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2022-03-03 18:43:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:41,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:41,289 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:41,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-03 18:43:41,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:41,489 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash 548367137, now seen corresponding path program 206 times [2022-03-03 18:43:41,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:41,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698377288] [2022-03-03 18:43:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:41,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:41,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:41,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698377288] [2022-03-03 18:43:41,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698377288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:41,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119602473] [2022-03-03 18:43:41,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:41,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:41,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:41,549 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) [2022-03-03 18:43:41,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-03 18:43:41,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:41,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:41,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:41,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119602473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:41,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:41,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:43:41,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988375768] [2022-03-03 18:43:41,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:41,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:41,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:41,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:41,707 INFO L87 Difference]: Start difference. First operand 2615 states and 7967 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:42,002 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2022-03-03 18:43:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 18:43:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:42,007 INFO L225 Difference]: With dead ends: 3613 [2022-03-03 18:43:42,007 INFO L226 Difference]: Without dead ends: 3598 [2022-03-03 18:43:42,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 18:43:42,007 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 135 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:43:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-03-03 18:43:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2022-03-03 18:43:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0459066564651875) internal successors, (7962), 2614 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2022-03-03 18:43:42,043 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2022-03-03 18:43:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:42,043 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2022-03-03 18:43:42,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2022-03-03 18:43:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:42,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:42,046 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:42,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-03 18:43:42,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:42,247 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash 387158667, now seen corresponding path program 207 times [2022-03-03 18:43:42,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:42,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989663371] [2022-03-03 18:43:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:42,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:42,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989663371] [2022-03-03 18:43:42,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989663371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:42,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001165388] [2022-03-03 18:43:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:42,301 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) [2022-03-03 18:43:42,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-03 18:43:42,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:43:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:42,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:42,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:42,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001165388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:42,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:42,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-03-03 18:43:42,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366322061] [2022-03-03 18:43:42,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:42,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:42,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:42,468 INFO L87 Difference]: Start difference. First operand 2615 states and 7962 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:43,057 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2022-03-03 18:43:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 18:43:43,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:43,064 INFO L225 Difference]: With dead ends: 3520 [2022-03-03 18:43:43,064 INFO L226 Difference]: Without dead ends: 3511 [2022-03-03 18:43:43,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 18:43:43,064 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 180 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:43,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 196 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2022-03-03 18:43:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2022-03-03 18:43:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.068287450840186) internal successors, (8582), 2797 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2022-03-03 18:43:43,115 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2022-03-03 18:43:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:43,115 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2022-03-03 18:43:43,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2022-03-03 18:43:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:43,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:43,120 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:43,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-03-03 18:43:43,320 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,SelfDestructingSolverStorable220 [2022-03-03 18:43:43,320 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash -77432437, now seen corresponding path program 208 times [2022-03-03 18:43:43,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:43,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608778296] [2022-03-03 18:43:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:43,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:43,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:43,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608778296] [2022-03-03 18:43:43,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608778296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:43,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241568712] [2022-03-03 18:43:43,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:43,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:43,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:43,376 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) [2022-03-03 18:43:43,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-03 18:43:43,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:43,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:43,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:43,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:43,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241568712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:43,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:43,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-03-03 18:43:43,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539522125] [2022-03-03 18:43:43,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:43,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:43,535 INFO L87 Difference]: Start difference. First operand 2798 states and 8582 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:44,209 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2022-03-03 18:43:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 18:43:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:44,214 INFO L225 Difference]: With dead ends: 3291 [2022-03-03 18:43:44,214 INFO L226 Difference]: Without dead ends: 3283 [2022-03-03 18:43:44,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 18:43:44,215 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 159 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:44,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 224 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-03-03 18:43:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2022-03-03 18:43:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.0369351669941063) internal successors, (7729), 2545 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2022-03-03 18:43:44,258 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2022-03-03 18:43:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:44,258 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2022-03-03 18:43:44,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2022-03-03 18:43:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:44,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:44,262 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:44,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-03 18:43:44,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:44,462 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:44,463 INFO L85 PathProgramCache]: Analyzing trace with hash -111031665, now seen corresponding path program 209 times [2022-03-03 18:43:44,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:44,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957502601] [2022-03-03 18:43:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:44,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:44,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:44,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957502601] [2022-03-03 18:43:44,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957502601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:44,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560146362] [2022-03-03 18:43:44,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:44,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:44,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:44,537 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) [2022-03-03 18:43:44,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-03 18:43:44,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:43:44,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:44,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:44,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:44,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560146362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:44,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:44,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-03-03 18:43:44,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83996636] [2022-03-03 18:43:44,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:44,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:43:44,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:43:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:43:44,739 INFO L87 Difference]: Start difference. First operand 2546 states and 7729 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:45,334 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2022-03-03 18:43:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:43:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:45,340 INFO L225 Difference]: With dead ends: 2975 [2022-03-03 18:43:45,340 INFO L226 Difference]: Without dead ends: 2967 [2022-03-03 18:43:45,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:43:45,341 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:45,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 138 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2022-03-03 18:43:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2022-03-03 18:43:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.037846273897776) internal successors, (7786), 2563 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2022-03-03 18:43:45,399 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2022-03-03 18:43:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:45,399 INFO L470 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2022-03-03 18:43:45,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2022-03-03 18:43:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:45,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:45,403 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:45,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-03 18:43:45,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-03 18:43:45,603 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash 979064775, now seen corresponding path program 210 times [2022-03-03 18:43:45,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:45,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451067070] [2022-03-03 18:43:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:45,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:45,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451067070] [2022-03-03 18:43:45,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451067070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:45,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669622518] [2022-03-03 18:43:45,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:45,654 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) [2022-03-03 18:43:45,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-03 18:43:45,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:43:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:45,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:45,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669622518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:45,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:45,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-03-03 18:43:45,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752694877] [2022-03-03 18:43:45,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:45,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:45,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:45,826 INFO L87 Difference]: Start difference. First operand 2564 states and 7786 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:46,376 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2022-03-03 18:43:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 18:43:46,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:46,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:46,383 INFO L225 Difference]: With dead ends: 3590 [2022-03-03 18:43:46,383 INFO L226 Difference]: Without dead ends: 3575 [2022-03-03 18:43:46,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 18:43:46,384 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 201 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:46,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 188 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2022-03-03 18:43:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2022-03-03 18:43:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.0612021857923497) internal successors, (8403), 2745 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2022-03-03 18:43:46,436 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2022-03-03 18:43:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:46,436 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2022-03-03 18:43:46,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2022-03-03 18:43:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:46,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:46,440 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:46,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-03 18:43:46,640 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,SelfDestructingSolverStorable223 [2022-03-03 18:43:46,641 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash 514473671, now seen corresponding path program 211 times [2022-03-03 18:43:46,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:46,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143416787] [2022-03-03 18:43:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:46,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:46,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:46,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143416787] [2022-03-03 18:43:46,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143416787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:46,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975185731] [2022-03-03 18:43:46,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:46,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:46,690 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) [2022-03-03 18:43:46,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-03 18:43:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:46,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:46,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975185731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:46,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:46,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-03-03 18:43:46,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872868798] [2022-03-03 18:43:46,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:46,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:46,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:46,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:46,869 INFO L87 Difference]: Start difference. First operand 2746 states and 8403 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:47,557 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2022-03-03 18:43:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:43:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:47,563 INFO L225 Difference]: With dead ends: 3290 [2022-03-03 18:43:47,564 INFO L226 Difference]: Without dead ends: 3284 [2022-03-03 18:43:47,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:43:47,564 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 216 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:47,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 167 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2022-03-03 18:43:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2022-03-03 18:43:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.0441232407759604) internal successors, (8003), 2629 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2022-03-03 18:43:47,614 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2022-03-03 18:43:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:47,614 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2022-03-03 18:43:47,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2022-03-03 18:43:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:47,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:47,618 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:47,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-03-03 18:43:47,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-03 18:43:47,818 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash 480874443, now seen corresponding path program 212 times [2022-03-03 18:43:47,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:47,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901674344] [2022-03-03 18:43:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:47,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:47,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901674344] [2022-03-03 18:43:47,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901674344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:47,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577617802] [2022-03-03 18:43:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:47,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:47,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:47,874 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) [2022-03-03 18:43:47,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-03 18:43:47,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:47,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:47,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:48,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:48,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577617802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:48,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:48,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 20 [2022-03-03 18:43:48,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064595593] [2022-03-03 18:43:48,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:48,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:43:48,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:43:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:43:48,044 INFO L87 Difference]: Start difference. First operand 2630 states and 8003 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:48,715 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2022-03-03 18:43:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 18:43:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:48,721 INFO L225 Difference]: With dead ends: 3240 [2022-03-03 18:43:48,721 INFO L226 Difference]: Without dead ends: 3228 [2022-03-03 18:43:48,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:43:48,721 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:48,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 175 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-03-03 18:43:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2022-03-03 18:43:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.048206710374084) internal successors, (7904), 2593 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2022-03-03 18:43:48,766 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2022-03-03 18:43:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:48,766 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2022-03-03 18:43:48,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2022-03-03 18:43:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:48,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:48,770 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:48,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-03 18:43:48,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:48,971 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash -560701625, now seen corresponding path program 213 times [2022-03-03 18:43:48,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:48,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680884306] [2022-03-03 18:43:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:48,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:49,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:49,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680884306] [2022-03-03 18:43:49,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680884306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:49,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978266186] [2022-03-03 18:43:49,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:49,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:49,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:49,033 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) [2022-03-03 18:43:49,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-03 18:43:49,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:43:49,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:49,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:49,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:49,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978266186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:49,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:49,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-03-03 18:43:49,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388168334] [2022-03-03 18:43:49,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:49,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:43:49,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:43:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:43:49,206 INFO L87 Difference]: Start difference. First operand 2594 states and 7904 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:49,797 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2022-03-03 18:43:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 18:43:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:49,803 INFO L225 Difference]: With dead ends: 3083 [2022-03-03 18:43:49,803 INFO L226 Difference]: Without dead ends: 3071 [2022-03-03 18:43:49,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:43:49,804 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:49,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 140 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2022-03-03 18:43:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2022-03-03 18:43:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.050133945656334) internal successors, (7970), 2613 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2022-03-03 18:43:49,848 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2022-03-03 18:43:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:49,848 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2022-03-03 18:43:49,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2022-03-03 18:43:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:49,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:49,852 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:49,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-03 18:43:50,052 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,SelfDestructingSolverStorable226 [2022-03-03 18:43:50,052 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2146682357, now seen corresponding path program 214 times [2022-03-03 18:43:50,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:50,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326812817] [2022-03-03 18:43:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:50,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:50,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:50,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326812817] [2022-03-03 18:43:50,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326812817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:50,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122618448] [2022-03-03 18:43:50,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:50,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:50,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:50,098 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) [2022-03-03 18:43:50,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-03 18:43:50,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:50,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:50,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:50,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:50,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122618448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:50,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:50,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-03-03 18:43:50,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453169954] [2022-03-03 18:43:50,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:50,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:50,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:50,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:50,285 INFO L87 Difference]: Start difference. First operand 2614 states and 7970 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:50,789 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2022-03-03 18:43:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 18:43:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:50,796 INFO L225 Difference]: With dead ends: 3813 [2022-03-03 18:43:50,796 INFO L226 Difference]: Without dead ends: 3801 [2022-03-03 18:43:50,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:43:50,797 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:50,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 148 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2022-03-03 18:43:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2022-03-03 18:43:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.0708661417322833) internal successors, (8970), 2921 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2022-03-03 18:43:50,852 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2022-03-03 18:43:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:50,852 INFO L470 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2022-03-03 18:43:50,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2022-03-03 18:43:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:50,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:50,856 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:50,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-03 18:43:51,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-03 18:43:51,057 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1683693835, now seen corresponding path program 215 times [2022-03-03 18:43:51,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:51,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991245661] [2022-03-03 18:43:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:51,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:51,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:51,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991245661] [2022-03-03 18:43:51,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991245661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:51,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101109887] [2022-03-03 18:43:51,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:51,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:51,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:51,103 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) [2022-03-03 18:43:51,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-03 18:43:51,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:43:51,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:51,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:51,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:51,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101109887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:51,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:51,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-03-03 18:43:51,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473967154] [2022-03-03 18:43:51,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:51,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:51,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:51,275 INFO L87 Difference]: Start difference. First operand 2922 states and 8970 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:52,032 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2022-03-03 18:43:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 18:43:52,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:52,039 INFO L225 Difference]: With dead ends: 3570 [2022-03-03 18:43:52,039 INFO L226 Difference]: Without dead ends: 3564 [2022-03-03 18:43:52,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 18:43:52,040 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 215 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:52,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 152 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-03-03 18:43:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2022-03-03 18:43:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2829 states have (on average 3.0572640509013786) internal successors, (8649), 2829 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2022-03-03 18:43:52,089 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2022-03-03 18:43:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:52,089 INFO L470 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2022-03-03 18:43:52,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2022-03-03 18:43:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:52,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:52,094 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:52,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-03 18:43:52,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-03 18:43:52,294 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1650094607, now seen corresponding path program 216 times [2022-03-03 18:43:52,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:52,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004590407] [2022-03-03 18:43:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:52,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:52,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:52,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004590407] [2022-03-03 18:43:52,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004590407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:52,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091315467] [2022-03-03 18:43:52,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:52,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:52,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:52,344 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) [2022-03-03 18:43:52,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-03 18:43:52,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:43:52,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:52,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:52,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091315467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:52,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:52,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 20 [2022-03-03 18:43:52,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600460536] [2022-03-03 18:43:52,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:52,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:43:52,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:43:52,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:43:52,520 INFO L87 Difference]: Start difference. First operand 2830 states and 8649 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:53,185 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2022-03-03 18:43:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:43:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:53,191 INFO L225 Difference]: With dead ends: 3572 [2022-03-03 18:43:53,192 INFO L226 Difference]: Without dead ends: 3564 [2022-03-03 18:43:53,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:43:53,193 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:53,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 152 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-03-03 18:43:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2022-03-03 18:43:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.0609756097560976) internal successors, (8785), 2870 states have internal predecessors, (8785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2022-03-03 18:43:53,256 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2022-03-03 18:43:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:53,256 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2022-03-03 18:43:53,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2022-03-03 18:43:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:53,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:53,284 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:53,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-03 18:43:53,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:53,485 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:53,485 INFO L85 PathProgramCache]: Analyzing trace with hash 608518539, now seen corresponding path program 217 times [2022-03-03 18:43:53,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:53,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071906099] [2022-03-03 18:43:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:53,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:53,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071906099] [2022-03-03 18:43:53,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071906099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:53,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587349543] [2022-03-03 18:43:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:43:53,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:53,543 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) [2022-03-03 18:43:53,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-03 18:43:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:53,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:53,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587349543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:53,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:53,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2022-03-03 18:43:53,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625437937] [2022-03-03 18:43:53,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:43:53,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:53,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:43:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:43:53,733 INFO L87 Difference]: Start difference. First operand 2871 states and 8785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:54,386 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2022-03-03 18:43:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:43:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:54,393 INFO L225 Difference]: With dead ends: 3644 [2022-03-03 18:43:54,394 INFO L226 Difference]: Without dead ends: 3632 [2022-03-03 18:43:54,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:43:54,395 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 220 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:54,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 147 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2022-03-03 18:43:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2022-03-03 18:43:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2920 states have (on average 3.0705479452054796) internal successors, (8966), 2920 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2022-03-03 18:43:54,449 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2022-03-03 18:43:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:54,449 INFO L470 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2022-03-03 18:43:54,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2022-03-03 18:43:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:54,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:54,453 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:54,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-03 18:43:54,654 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,SelfDestructingSolverStorable230 [2022-03-03 18:43:54,654 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1615568497, now seen corresponding path program 218 times [2022-03-03 18:43:54,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:54,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46593420] [2022-03-03 18:43:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:54,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:54,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46593420] [2022-03-03 18:43:54,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46593420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:54,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118942294] [2022-03-03 18:43:54,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:43:54,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:54,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:54,717 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) [2022-03-03 18:43:54,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-03 18:43:54,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:43:54,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:54,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:54,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118942294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:54,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:54,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-03-03 18:43:54,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604246570] [2022-03-03 18:43:54,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:54,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:43:54,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:43:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:43:54,905 INFO L87 Difference]: Start difference. First operand 2921 states and 8966 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:55,490 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2022-03-03 18:43:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 18:43:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:55,496 INFO L225 Difference]: With dead ends: 3521 [2022-03-03 18:43:55,497 INFO L226 Difference]: Without dead ends: 3505 [2022-03-03 18:43:55,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:43:55,497 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 175 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:55,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 128 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2022-03-03 18:43:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2022-03-03 18:43:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.0701457133175194) internal successors, (9060), 2951 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2022-03-03 18:43:55,549 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2022-03-03 18:43:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:55,549 INFO L470 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2022-03-03 18:43:55,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2022-03-03 18:43:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:55,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:55,553 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:55,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-03 18:43:55,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:55,754 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash -260595641, now seen corresponding path program 219 times [2022-03-03 18:43:55,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:55,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170834635] [2022-03-03 18:43:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:55,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:55,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:55,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170834635] [2022-03-03 18:43:55,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170834635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:55,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575992441] [2022-03-03 18:43:55,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:43:55,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:55,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:55,796 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:43:55,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-03 18:43:55,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:43:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:55,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:55,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575992441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:55,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:55,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-03-03 18:43:55,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045643404] [2022-03-03 18:43:55,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:55,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:55,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:55,998 INFO L87 Difference]: Start difference. First operand 2952 states and 9060 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:56,535 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2022-03-03 18:43:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 18:43:56,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:56,545 INFO L225 Difference]: With dead ends: 4650 [2022-03-03 18:43:56,545 INFO L226 Difference]: Without dead ends: 4641 [2022-03-03 18:43:56,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:43:56,545 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 244 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:56,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 177 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2022-03-03 18:43:56,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2022-03-03 18:43:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 3.116581777023203) internal successors, (11014), 3534 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2022-03-03 18:43:56,642 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2022-03-03 18:43:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:56,642 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2022-03-03 18:43:56,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2022-03-03 18:43:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:56,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:56,648 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:56,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-03 18:43:56,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-03 18:43:56,848 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash -725186745, now seen corresponding path program 220 times [2022-03-03 18:43:56,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:56,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974073031] [2022-03-03 18:43:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:56,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:56,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:56,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974073031] [2022-03-03 18:43:56,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974073031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:56,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220877740] [2022-03-03 18:43:56,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:43:56,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:56,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:56,890 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:43:56,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-03 18:43:56,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:43:56,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:56,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:56,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:57,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:57,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220877740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:57,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:57,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-03-03 18:43:57,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820516595] [2022-03-03 18:43:57,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:57,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:43:57,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:43:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:43:57,072 INFO L87 Difference]: Start difference. First operand 3535 states and 11014 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:57,944 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2022-03-03 18:43:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 18:43:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:57,952 INFO L225 Difference]: With dead ends: 4324 [2022-03-03 18:43:57,952 INFO L226 Difference]: Without dead ends: 4320 [2022-03-03 18:43:57,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 18:43:57,953 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 254 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:57,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 152 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2022-03-03 18:43:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2022-03-03 18:43:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.1048971312662994) internal successors, (10715), 3451 states have internal predecessors, (10715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2022-03-03 18:43:58,023 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2022-03-03 18:43:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:58,023 INFO L470 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2022-03-03 18:43:58,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2022-03-03 18:43:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:58,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:58,029 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:58,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-03 18:43:58,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-03-03 18:43:58,229 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:58,229 INFO L85 PathProgramCache]: Analyzing trace with hash -758785973, now seen corresponding path program 221 times [2022-03-03 18:43:58,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:58,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632568916] [2022-03-03 18:43:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:58,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:58,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:58,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632568916] [2022-03-03 18:43:58,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632568916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:58,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925508033] [2022-03-03 18:43:58,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:43:58,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:58,287 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:43:58,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-03 18:43:58,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:43:58,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:58,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:58,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925508033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:58,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:58,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 20 [2022-03-03 18:43:58,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752255698] [2022-03-03 18:43:58,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:58,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:43:58,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:58,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:43:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:43:58,467 INFO L87 Difference]: Start difference. First operand 3452 states and 10715 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:43:59,268 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2022-03-03 18:43:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 18:43:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:43:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:43:59,276 INFO L225 Difference]: With dead ends: 4399 [2022-03-03 18:43:59,277 INFO L226 Difference]: Without dead ends: 4391 [2022-03-03 18:43:59,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 18:43:59,278 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 210 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:43:59,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 184 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:43:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2022-03-03 18:43:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2022-03-03 18:43:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 3.1150042384854477) internal successors, (11024), 3539 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2022-03-03 18:43:59,346 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2022-03-03 18:43:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:43:59,346 INFO L470 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2022-03-03 18:43:59,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:43:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2022-03-03 18:43:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:43:59,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:43:59,352 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:43:59,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-03 18:43:59,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:59,553 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:43:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:43:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1800362041, now seen corresponding path program 222 times [2022-03-03 18:43:59,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:43:59,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426527808] [2022-03-03 18:43:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:43:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:43:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:43:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:59,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:43:59,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426527808] [2022-03-03 18:43:59,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426527808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:43:59,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835842979] [2022-03-03 18:43:59,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:43:59,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:43:59,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:43:59,605 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:43:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-03 18:43:59,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:43:59,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:43:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:43:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:43:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:43:59,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:43:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:43:59,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835842979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:43:59,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:43:59,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2022-03-03 18:43:59,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553361473] [2022-03-03 18:43:59,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:43:59,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:43:59,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:43:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:43:59,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:43:59,793 INFO L87 Difference]: Start difference. First operand 3540 states and 11024 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:00,497 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2022-03-03 18:44:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 18:44:00,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:00,506 INFO L225 Difference]: With dead ends: 4554 [2022-03-03 18:44:00,506 INFO L226 Difference]: Without dead ends: 4542 [2022-03-03 18:44:00,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 18:44:00,507 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 228 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:00,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 156 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-03-03 18:44:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2022-03-03 18:44:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 3.129907773386034) internal successors, (11878), 3795 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2022-03-03 18:44:00,580 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2022-03-03 18:44:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:00,580 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2022-03-03 18:44:00,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2022-03-03 18:44:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:00,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:00,587 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:00,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-03 18:44:00,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-03 18:44:00,787 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash 270518219, now seen corresponding path program 223 times [2022-03-03 18:44:00,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:00,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937228847] [2022-03-03 18:44:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:00,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:00,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937228847] [2022-03-03 18:44:00,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937228847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:00,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523665040] [2022-03-03 18:44:00,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:00,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:00,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:00,845 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:00,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-03 18:44:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:01,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:01,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523665040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:01,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:01,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 22 [2022-03-03 18:44:01,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574417444] [2022-03-03 18:44:01,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:01,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:44:01,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:44:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:44:01,043 INFO L87 Difference]: Start difference. First operand 3796 states and 11878 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:01,685 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2022-03-03 18:44:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 18:44:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:01,694 INFO L225 Difference]: With dead ends: 4840 [2022-03-03 18:44:01,695 INFO L226 Difference]: Without dead ends: 4824 [2022-03-03 18:44:01,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:44:01,695 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 267 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:01,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 121 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2022-03-03 18:44:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2022-03-03 18:44:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.143909626719057) internal successors, (12802), 4072 states have internal predecessors, (12802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2022-03-03 18:44:01,773 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2022-03-03 18:44:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:01,773 INFO L470 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2022-03-03 18:44:01,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2022-03-03 18:44:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:01,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:01,779 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:01,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:01,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-03-03 18:44:01,980 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash 43296839, now seen corresponding path program 224 times [2022-03-03 18:44:01,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:01,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130135356] [2022-03-03 18:44:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:02,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:02,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130135356] [2022-03-03 18:44:02,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130135356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:02,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384566523] [2022-03-03 18:44:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:02,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:02,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:02,044 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:02,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-03 18:44:02,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:02,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:02,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:02,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:02,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:02,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384566523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:02,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:02,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-03-03 18:44:02,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104947913] [2022-03-03 18:44:02,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:02,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:44:02,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:44:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:44:02,245 INFO L87 Difference]: Start difference. First operand 4073 states and 12802 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:02,827 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2022-03-03 18:44:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 18:44:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:02,837 INFO L225 Difference]: With dead ends: 4789 [2022-03-03 18:44:02,837 INFO L226 Difference]: Without dead ends: 4769 [2022-03-03 18:44:02,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:44:02,838 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 180 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:02,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 134 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2022-03-03 18:44:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2022-03-03 18:44:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 3.143377885783718) internal successors, (12935), 4115 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2022-03-03 18:44:02,930 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2022-03-03 18:44:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:02,930 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2022-03-03 18:44:02,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2022-03-03 18:44:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:02,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:02,937 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:02,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-03 18:44:03,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-03-03 18:44:03,138 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -750854521, now seen corresponding path program 225 times [2022-03-03 18:44:03,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:03,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076670212] [2022-03-03 18:44:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:03,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:03,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:03,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076670212] [2022-03-03 18:44:03,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076670212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:03,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347433603] [2022-03-03 18:44:03,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:03,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:03,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:03,198 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:03,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-03 18:44:03,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:44:03,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:03,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:03,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347433603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:03,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:03,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-03-03 18:44:03,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215019859] [2022-03-03 18:44:03,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:03,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:44:03,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:44:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:44:03,338 INFO L87 Difference]: Start difference. First operand 4116 states and 12935 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:03,500 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2022-03-03 18:44:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:44:03,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:03,510 INFO L225 Difference]: With dead ends: 4973 [2022-03-03 18:44:03,510 INFO L226 Difference]: Without dead ends: 4973 [2022-03-03 18:44:03,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:44:03,510 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 98 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:03,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 119 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2022-03-03 18:44:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2022-03-03 18:44:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 3.1423769507803123) internal successors, (13088), 4165 states have internal predecessors, (13088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2022-03-03 18:44:03,589 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2022-03-03 18:44:03,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:03,589 INFO L470 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2022-03-03 18:44:03,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:03,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2022-03-03 18:44:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:03,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:03,596 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:03,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-03 18:44:03,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:03,797 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash 522079187, now seen corresponding path program 226 times [2022-03-03 18:44:03,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:03,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729901412] [2022-03-03 18:44:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:03,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:03,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:03,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729901412] [2022-03-03 18:44:03,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729901412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:03,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527697845] [2022-03-03 18:44:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:03,857 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:03,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-03 18:44:03,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:03,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:03,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:03,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:03,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:04,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527697845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:04,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:04,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:04,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806935645] [2022-03-03 18:44:04,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:04,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:04,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:04,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:04,017 INFO L87 Difference]: Start difference. First operand 4166 states and 13088 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:04,212 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2022-03-03 18:44:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:44:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:04,220 INFO L225 Difference]: With dead ends: 4567 [2022-03-03 18:44:04,220 INFO L226 Difference]: Without dead ends: 4567 [2022-03-03 18:44:04,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:44:04,221 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:04,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 92 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2022-03-03 18:44:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2022-03-03 18:44:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 3.141798182687709) internal successors, (13139), 4182 states have internal predecessors, (13139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2022-03-03 18:44:04,285 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2022-03-03 18:44:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:04,286 INFO L470 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2022-03-03 18:44:04,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2022-03-03 18:44:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:04,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:04,292 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:04,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-03 18:44:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:04,492 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2082945205, now seen corresponding path program 227 times [2022-03-03 18:44:04,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:04,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267567598] [2022-03-03 18:44:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:04,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:04,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:04,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267567598] [2022-03-03 18:44:04,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267567598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:04,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708890851] [2022-03-03 18:44:04,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:04,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:04,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:04,549 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:04,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-03 18:44:04,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:44:04,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:04,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:04,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708890851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:04,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:04,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:04,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842605162] [2022-03-03 18:44:04,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:04,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:04,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:04,716 INFO L87 Difference]: Start difference. First operand 4183 states and 13139 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:05,027 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2022-03-03 18:44:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 18:44:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:05,034 INFO L225 Difference]: With dead ends: 4690 [2022-03-03 18:44:05,034 INFO L226 Difference]: Without dead ends: 4690 [2022-03-03 18:44:05,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:44:05,034 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:05,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 154 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2022-03-03 18:44:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2022-03-03 18:44:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 3.141224100976423) internal successors, (13190), 4199 states have internal predecessors, (13190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2022-03-03 18:44:05,108 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2022-03-03 18:44:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:05,108 INFO L470 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2022-03-03 18:44:05,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2022-03-03 18:44:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:05,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:05,113 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:05,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:05,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:05,314 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1197146925, now seen corresponding path program 228 times [2022-03-03 18:44:05,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:05,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514076309] [2022-03-03 18:44:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:05,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:05,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514076309] [2022-03-03 18:44:05,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514076309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:05,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865149138] [2022-03-03 18:44:05,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:05,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:05,371 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:05,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-03 18:44:05,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:44:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:05,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:05,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865149138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:05,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:05,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:05,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116006028] [2022-03-03 18:44:05,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:05,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:05,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:05,522 INFO L87 Difference]: Start difference. First operand 4200 states and 13190 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:06,015 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2022-03-03 18:44:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:44:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:06,025 INFO L225 Difference]: With dead ends: 4708 [2022-03-03 18:44:06,025 INFO L226 Difference]: Without dead ends: 4708 [2022-03-03 18:44:06,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 18:44:06,025 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:06,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 172 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2022-03-03 18:44:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2022-03-03 18:44:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.1397163120567377) internal successors, (13281), 4230 states have internal predecessors, (13281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2022-03-03 18:44:06,102 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2022-03-03 18:44:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:06,102 INFO L470 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2022-03-03 18:44:06,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2022-03-03 18:44:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:06,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:06,109 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:06,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-03 18:44:06,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:06,310 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 909637195, now seen corresponding path program 229 times [2022-03-03 18:44:06,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:06,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842645318] [2022-03-03 18:44:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:06,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:06,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842645318] [2022-03-03 18:44:06,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842645318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:06,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818538768] [2022-03-03 18:44:06,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:06,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:06,370 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:06,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-03 18:44:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:06,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:06,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:06,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:06,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818538768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:06,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:06,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:06,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270678869] [2022-03-03 18:44:06,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:06,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:06,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:06,541 INFO L87 Difference]: Start difference. First operand 4231 states and 13281 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:07,190 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2022-03-03 18:44:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 18:44:07,190 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:07,199 INFO L225 Difference]: With dead ends: 4892 [2022-03-03 18:44:07,200 INFO L226 Difference]: Without dead ends: 4892 [2022-03-03 18:44:07,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 18:44:07,200 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 120 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:07,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 258 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2022-03-03 18:44:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2022-03-03 18:44:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 3.140959925442684) internal successors, (13481), 4292 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2022-03-03 18:44:07,282 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2022-03-03 18:44:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:07,282 INFO L470 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2022-03-03 18:44:07,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2022-03-03 18:44:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:07,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:07,289 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:07,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-03 18:44:07,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:07,491 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:07,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1239159341, now seen corresponding path program 230 times [2022-03-03 18:44:07,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:07,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794355978] [2022-03-03 18:44:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:07,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:07,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794355978] [2022-03-03 18:44:07,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794355978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:07,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965919651] [2022-03-03 18:44:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:07,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:07,550 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:07,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-03 18:44:07,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:07,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:07,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:07,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:07,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965919651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:07,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:07,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:07,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135942005] [2022-03-03 18:44:07,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:07,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:07,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:07,705 INFO L87 Difference]: Start difference. First operand 4293 states and 13481 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:08,335 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2022-03-03 18:44:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:44:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:08,368 INFO L225 Difference]: With dead ends: 5068 [2022-03-03 18:44:08,368 INFO L226 Difference]: Without dead ends: 5068 [2022-03-03 18:44:08,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 18:44:08,368 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 189 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:08,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 200 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2022-03-03 18:44:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2022-03-03 18:44:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.1475409836065573) internal successors, (13440), 4270 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2022-03-03 18:44:08,443 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2022-03-03 18:44:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:08,444 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2022-03-03 18:44:08,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2022-03-03 18:44:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:08,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:08,451 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:08,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-03-03 18:44:08,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:08,651 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash -667704535, now seen corresponding path program 231 times [2022-03-03 18:44:08,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:08,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765779800] [2022-03-03 18:44:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:08,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:08,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:08,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765779800] [2022-03-03 18:44:08,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765779800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:08,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122808886] [2022-03-03 18:44:08,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:08,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:08,711 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:08,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-03 18:44:08,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:44:08,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:08,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:08,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122808886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:08,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:08,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:08,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037236028] [2022-03-03 18:44:08,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:08,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:08,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:08,866 INFO L87 Difference]: Start difference. First operand 4271 states and 13440 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:09,492 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2022-03-03 18:44:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:44:09,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:09,502 INFO L225 Difference]: With dead ends: 4740 [2022-03-03 18:44:09,502 INFO L226 Difference]: Without dead ends: 4734 [2022-03-03 18:44:09,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 18:44:09,503 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:09,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 184 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2022-03-03 18:44:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2022-03-03 18:44:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 3.137542829172785) internal successors, (12820), 4086 states have internal predecessors, (12820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2022-03-03 18:44:09,579 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2022-03-03 18:44:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:09,579 INFO L470 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2022-03-03 18:44:09,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2022-03-03 18:44:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:09,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:09,586 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:09,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-03 18:44:09,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-03 18:44:09,786 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1695691215, now seen corresponding path program 232 times [2022-03-03 18:44:09,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:09,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316814240] [2022-03-03 18:44:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:09,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:09,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:09,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316814240] [2022-03-03 18:44:09,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316814240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:09,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841014448] [2022-03-03 18:44:09,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:09,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:09,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:09,860 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:09,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-03 18:44:09,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:09,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:09,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:09,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:09,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:10,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841014448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:10,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:10,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:10,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212752391] [2022-03-03 18:44:10,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:10,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:10,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:10,021 INFO L87 Difference]: Start difference. First operand 4087 states and 12820 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:10,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:10,525 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2022-03-03 18:44:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 18:44:10,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:10,537 INFO L225 Difference]: With dead ends: 5641 [2022-03-03 18:44:10,537 INFO L226 Difference]: Without dead ends: 5629 [2022-03-03 18:44:10,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:44:10,538 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 321 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:10,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 147 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2022-03-03 18:44:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2022-03-03 18:44:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 3.1621224832214767) internal successors, (15077), 4768 states have internal predecessors, (15077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2022-03-03 18:44:10,633 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2022-03-03 18:44:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:10,633 INFO L470 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2022-03-03 18:44:10,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2022-03-03 18:44:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:10,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:10,641 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:10,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:10,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-03 18:44:10,842 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1231100111, now seen corresponding path program 233 times [2022-03-03 18:44:10,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:10,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575050395] [2022-03-03 18:44:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:10,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:10,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575050395] [2022-03-03 18:44:10,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575050395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:10,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045652886] [2022-03-03 18:44:10,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:10,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:10,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:10,900 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:10,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-03 18:44:10,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:44:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:11,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:11,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045652886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:11,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:11,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:11,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714841587] [2022-03-03 18:44:11,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:11,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:11,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:11,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:11,057 INFO L87 Difference]: Start difference. First operand 4769 states and 15077 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:11,582 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2022-03-03 18:44:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 18:44:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:11,613 INFO L225 Difference]: With dead ends: 5550 [2022-03-03 18:44:11,613 INFO L226 Difference]: Without dead ends: 5546 [2022-03-03 18:44:11,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 18:44:11,613 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 212 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:11,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 148 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2022-03-03 18:44:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2022-03-03 18:44:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.1385701676963813) internal successors, (14224), 4532 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2022-03-03 18:44:11,675 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2022-03-03 18:44:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:11,675 INFO L470 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2022-03-03 18:44:11,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2022-03-03 18:44:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:11,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:11,681 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:11,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:11,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-03 18:44:11,882 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:11,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1197500883, now seen corresponding path program 234 times [2022-03-03 18:44:11,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:11,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710686771] [2022-03-03 18:44:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:11,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:11,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:11,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710686771] [2022-03-03 18:44:11,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710686771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:11,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560831719] [2022-03-03 18:44:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:11,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:11,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:11,939 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:11,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-03 18:44:11,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:44:11,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:11,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:12,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:12,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560831719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:12,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:12,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:12,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402882306] [2022-03-03 18:44:12,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:12,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:12,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:12,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:12,103 INFO L87 Difference]: Start difference. First operand 4533 states and 14224 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:12,569 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2022-03-03 18:44:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 18:44:12,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:12,578 INFO L225 Difference]: With dead ends: 5471 [2022-03-03 18:44:12,578 INFO L226 Difference]: Without dead ends: 5463 [2022-03-03 18:44:12,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 18:44:12,578 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 328 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:12,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 112 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2022-03-03 18:44:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2022-03-03 18:44:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.1386861313868613) internal successors, (14620), 4658 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2022-03-03 18:44:12,644 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2022-03-03 18:44:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:12,644 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2022-03-03 18:44:12,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2022-03-03 18:44:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:12,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:12,650 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:12,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-03-03 18:44:12,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:12,850 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash 155924815, now seen corresponding path program 235 times [2022-03-03 18:44:12,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:12,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669488582] [2022-03-03 18:44:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:12,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:12,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669488582] [2022-03-03 18:44:12,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669488582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:12,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395095213] [2022-03-03 18:44:12,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:12,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:12,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:12,924 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:12,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-03 18:44:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:12,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:13,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:13,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395095213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:13,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:13,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:13,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369020896] [2022-03-03 18:44:13,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:13,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:13,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:13,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:13,079 INFO L87 Difference]: Start difference. First operand 4659 states and 14620 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:13,532 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2022-03-03 18:44:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 18:44:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:13,543 INFO L225 Difference]: With dead ends: 5651 [2022-03-03 18:44:13,543 INFO L226 Difference]: Without dead ends: 5639 [2022-03-03 18:44:13,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 18:44:13,543 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 125 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2022-03-03 18:44:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2022-03-03 18:44:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.134668071654373) internal successors, (14874), 4745 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2022-03-03 18:44:13,625 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2022-03-03 18:44:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:13,626 INFO L470 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2022-03-03 18:44:13,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2022-03-03 18:44:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:13,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:13,633 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:13,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-03-03 18:44:13,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:13,833 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2068162221, now seen corresponding path program 236 times [2022-03-03 18:44:13,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:13,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435197686] [2022-03-03 18:44:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:13,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:13,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435197686] [2022-03-03 18:44:13,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435197686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:13,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615656652] [2022-03-03 18:44:13,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:13,893 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:13,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-03 18:44:13,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:14,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:14,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615656652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:14,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:14,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:14,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461735490] [2022-03-03 18:44:14,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:14,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:14,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:14,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:14,050 INFO L87 Difference]: Start difference. First operand 4746 states and 14874 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:14,469 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2022-03-03 18:44:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:44:14,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:14,481 INFO L225 Difference]: With dead ends: 5785 [2022-03-03 18:44:14,481 INFO L226 Difference]: Without dead ends: 5769 [2022-03-03 18:44:14,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 18:44:14,482 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:14,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 123 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2022-03-03 18:44:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2022-03-03 18:44:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.131064902331443) internal successors, (14907), 4761 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2022-03-03 18:44:14,591 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2022-03-03 18:44:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:14,591 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2022-03-03 18:44:14,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2022-03-03 18:44:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:14,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:14,599 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:14,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-03 18:44:14,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:14,799 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1999583695, now seen corresponding path program 237 times [2022-03-03 18:44:14,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:14,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970569321] [2022-03-03 18:44:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:14,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:14,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970569321] [2022-03-03 18:44:14,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970569321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:14,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571271391] [2022-03-03 18:44:14,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:14,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:14,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:14,860 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:14,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-03 18:44:14,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:44:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:14,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:15,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571271391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:15,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:15,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-03 18:44:15,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843624251] [2022-03-03 18:44:15,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:15,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:15,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:15,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:15,019 INFO L87 Difference]: Start difference. First operand 4762 states and 14907 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:15,317 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2022-03-03 18:44:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 18:44:15,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:15,328 INFO L225 Difference]: With dead ends: 5323 [2022-03-03 18:44:15,328 INFO L226 Difference]: Without dead ends: 5313 [2022-03-03 18:44:15,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 18:44:15,328 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:15,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 89 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2022-03-03 18:44:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2022-03-03 18:44:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1300147027935306) internal successors, (14902), 4761 states have internal predecessors, (14902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2022-03-03 18:44:15,417 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2022-03-03 18:44:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:15,417 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2022-03-03 18:44:15,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2022-03-03 18:44:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:15,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:15,425 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:15,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-03 18:44:15,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:15,625 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2018594477, now seen corresponding path program 238 times [2022-03-03 18:44:15,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:15,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567341789] [2022-03-03 18:44:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:15,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:15,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567341789] [2022-03-03 18:44:15,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567341789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:15,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821168741] [2022-03-03 18:44:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:15,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:15,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:15,697 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:15,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-03 18:44:15,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:15,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:15,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821168741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:15,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:15,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-03-03 18:44:15,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912108214] [2022-03-03 18:44:15,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:15,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 18:44:15,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:15,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 18:44:15,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:44:15,846 INFO L87 Difference]: Start difference. First operand 4762 states and 14902 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:16,015 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2022-03-03 18:44:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:44:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:16,026 INFO L225 Difference]: With dead ends: 5170 [2022-03-03 18:44:16,026 INFO L226 Difference]: Without dead ends: 5158 [2022-03-03 18:44:16,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:44:16,026 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:16,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 111 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2022-03-03 18:44:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2022-03-03 18:44:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1298046628859484) internal successors, (14901), 4761 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2022-03-03 18:44:16,111 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2022-03-03 18:44:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:16,111 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2022-03-03 18:44:16,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2022-03-03 18:44:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:16,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:16,117 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:16,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-03-03 18:44:16,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:16,318 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1328318471, now seen corresponding path program 239 times [2022-03-03 18:44:16,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:16,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990430564] [2022-03-03 18:44:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:16,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:16,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:16,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990430564] [2022-03-03 18:44:16,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990430564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:16,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875176428] [2022-03-03 18:44:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:16,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:16,376 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:16,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-03 18:44:16,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:44:16,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:16,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:16,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:16,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875176428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:16,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:16,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-03-03 18:44:16,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944824568] [2022-03-03 18:44:16,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:16,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:16,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:16,530 INFO L87 Difference]: Start difference. First operand 4762 states and 14901 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:16,971 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2022-03-03 18:44:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 18:44:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:16,979 INFO L225 Difference]: With dead ends: 5204 [2022-03-03 18:44:16,979 INFO L226 Difference]: Without dead ends: 5204 [2022-03-03 18:44:16,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 18:44:16,980 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:16,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2022-03-03 18:44:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2022-03-03 18:44:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.129396984924623) internal successors, (14946), 4776 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2022-03-03 18:44:17,076 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2022-03-03 18:44:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:17,076 INFO L470 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2022-03-03 18:44:17,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2022-03-03 18:44:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:17,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:17,083 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:17,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-03 18:44:17,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:17,283 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -428083449, now seen corresponding path program 240 times [2022-03-03 18:44:17,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:17,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232753244] [2022-03-03 18:44:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:17,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:17,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:17,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232753244] [2022-03-03 18:44:17,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232753244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:17,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829151768] [2022-03-03 18:44:17,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:17,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:17,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:17,338 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:17,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-03 18:44:17,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:44:17,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:17,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:17,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:17,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829151768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:17,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:17,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-03-03 18:44:17,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089203520] [2022-03-03 18:44:17,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:17,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:17,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:17,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:17,496 INFO L87 Difference]: Start difference. First operand 4777 states and 14946 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:17,902 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2022-03-03 18:44:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 18:44:17,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:17,911 INFO L225 Difference]: With dead ends: 5391 [2022-03-03 18:44:17,911 INFO L226 Difference]: Without dead ends: 5381 [2022-03-03 18:44:17,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 18:44:17,912 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:17,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 126 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-03-03 18:44:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2022-03-03 18:44:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 3.128413591828226) internal successors, (15007), 4797 states have internal predecessors, (15007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2022-03-03 18:44:17,986 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2022-03-03 18:44:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:17,986 INFO L470 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2022-03-03 18:44:17,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2022-03-03 18:44:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:17,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:17,993 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:18,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-03-03 18:44:18,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:18,193 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2147309561, now seen corresponding path program 241 times [2022-03-03 18:44:18,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:18,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191749736] [2022-03-03 18:44:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:18,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:18,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191749736] [2022-03-03 18:44:18,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191749736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:18,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384416796] [2022-03-03 18:44:18,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:18,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:18,247 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:18,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-03 18:44:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:18,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:18,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384416796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:18,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:18,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-03-03 18:44:18,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584658755] [2022-03-03 18:44:18,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:18,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:18,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:18,397 INFO L87 Difference]: Start difference. First operand 4798 states and 15007 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:18,752 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2022-03-03 18:44:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 18:44:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:18,761 INFO L225 Difference]: With dead ends: 5359 [2022-03-03 18:44:18,761 INFO L226 Difference]: Without dead ends: 5349 [2022-03-03 18:44:18,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 18:44:18,761 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:18,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 91 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:44:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-03-03 18:44:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2022-03-03 18:44:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 3.1258828417116744) internal successors, (15048), 4814 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2022-03-03 18:44:18,848 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2022-03-03 18:44:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:18,848 INFO L470 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2022-03-03 18:44:18,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2022-03-03 18:44:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:18,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:18,856 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:18,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-03 18:44:19,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-03 18:44:19,057 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 845272839, now seen corresponding path program 242 times [2022-03-03 18:44:19,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:19,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508203681] [2022-03-03 18:44:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:19,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:19,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:19,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508203681] [2022-03-03 18:44:19,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508203681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:19,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246873897] [2022-03-03 18:44:19,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:19,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:19,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:19,128 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:19,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-03 18:44:19,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:19,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:19,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:19,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:19,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246873897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:19,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:19,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-03-03 18:44:19,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775716741] [2022-03-03 18:44:19,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:19,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:19,288 INFO L87 Difference]: Start difference. First operand 4815 states and 15048 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:19,793 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2022-03-03 18:44:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 18:44:19,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:19,804 INFO L225 Difference]: With dead ends: 5632 [2022-03-03 18:44:19,804 INFO L226 Difference]: Without dead ends: 5628 [2022-03-03 18:44:19,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 18:44:19,805 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 141 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:19,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 139 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2022-03-03 18:44:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2022-03-03 18:44:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 3.1237562189054726) internal successors, (15069), 4824 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2022-03-03 18:44:19,878 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2022-03-03 18:44:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:19,878 INFO L470 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2022-03-03 18:44:19,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2022-03-03 18:44:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:19,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:19,885 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:19,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-03 18:44:20,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-03 18:44:20,088 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 803260423, now seen corresponding path program 243 times [2022-03-03 18:44:20,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:20,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216036627] [2022-03-03 18:44:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:20,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:20,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216036627] [2022-03-03 18:44:20,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216036627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:20,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251290194] [2022-03-03 18:44:20,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:20,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:20,153 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:20,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-03 18:44:20,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:44:20,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:20,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:20,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:20,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251290194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:20,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:20,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-03-03 18:44:20,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315947209] [2022-03-03 18:44:20,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:20,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:20,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:20,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:20,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:20,304 INFO L87 Difference]: Start difference. First operand 4825 states and 15069 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:20,892 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2022-03-03 18:44:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 18:44:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:20,902 INFO L225 Difference]: With dead ends: 5908 [2022-03-03 18:44:20,902 INFO L226 Difference]: Without dead ends: 5908 [2022-03-03 18:44:20,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 18:44:20,903 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 217 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:20,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 198 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2022-03-03 18:44:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2022-03-03 18:44:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 3.1329776318489637) internal successors, (15267), 4873 states have internal predecessors, (15267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2022-03-03 18:44:20,981 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2022-03-03 18:44:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:20,981 INFO L470 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2022-03-03 18:44:20,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2022-03-03 18:44:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:20,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:20,988 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:21,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-03-03 18:44:21,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-03 18:44:21,189 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1374715229, now seen corresponding path program 244 times [2022-03-03 18:44:21,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:21,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983407001] [2022-03-03 18:44:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:21,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:21,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983407001] [2022-03-03 18:44:21,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983407001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:21,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821309380] [2022-03-03 18:44:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:21,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:21,242 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:21,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-03 18:44:21,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:21,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:21,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821309380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:21,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:21,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-03-03 18:44:21,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42649466] [2022-03-03 18:44:21,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:21,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:21,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:21,394 INFO L87 Difference]: Start difference. First operand 4874 states and 15267 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:22,024 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2022-03-03 18:44:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 18:44:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:22,033 INFO L225 Difference]: With dead ends: 5619 [2022-03-03 18:44:22,033 INFO L226 Difference]: Without dead ends: 5607 [2022-03-03 18:44:22,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 18:44:22,034 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 180 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:22,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 195 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2022-03-03 18:44:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2022-03-03 18:44:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 3.120291095890411) internal successors, (14578), 4672 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2022-03-03 18:44:22,104 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2022-03-03 18:44:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:22,104 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2022-03-03 18:44:22,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2022-03-03 18:44:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:22,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:22,110 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:22,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-03-03 18:44:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:22,310 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1909945031, now seen corresponding path program 245 times [2022-03-03 18:44:22,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:22,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142408964] [2022-03-03 18:44:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:22,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:22,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:22,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142408964] [2022-03-03 18:44:22,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142408964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:22,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669829366] [2022-03-03 18:44:22,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:22,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:22,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:22,372 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:22,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-03 18:44:22,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:44:22,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:22,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:22,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:22,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:22,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669829366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:22,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:22,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-03-03 18:44:22,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449346644] [2022-03-03 18:44:22,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:22,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:22,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:22,541 INFO L87 Difference]: Start difference. First operand 4673 states and 14578 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:23,141 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2022-03-03 18:44:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:44:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:23,150 INFO L225 Difference]: With dead ends: 5350 [2022-03-03 18:44:23,150 INFO L226 Difference]: Without dead ends: 5338 [2022-03-03 18:44:23,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:44:23,151 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 133 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:23,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 205 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2022-03-03 18:44:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2022-03-03 18:44:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 3.1207996597192684) internal successors, (14674), 4702 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2022-03-03 18:44:23,233 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2022-03-03 18:44:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:23,233 INFO L470 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2022-03-03 18:44:23,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2022-03-03 18:44:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:23,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:23,239 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:23,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-03-03 18:44:23,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-03-03 18:44:23,439 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash 551932499, now seen corresponding path program 246 times [2022-03-03 18:44:23,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:23,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837006229] [2022-03-03 18:44:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:23,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:23,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837006229] [2022-03-03 18:44:23,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837006229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:23,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920764559] [2022-03-03 18:44:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:23,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:23,503 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:23,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-03 18:44:23,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:44:23,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:23,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:23,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:23,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920764559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:23,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:23,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-03-03 18:44:23,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673713004] [2022-03-03 18:44:23,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:23,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:44:23,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:23,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:44:23,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:44:23,677 INFO L87 Difference]: Start difference. First operand 4703 states and 14674 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:24,177 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2022-03-03 18:44:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 18:44:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:24,185 INFO L225 Difference]: With dead ends: 5100 [2022-03-03 18:44:24,185 INFO L226 Difference]: Without dead ends: 5100 [2022-03-03 18:44:24,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 18:44:24,186 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:24,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 117 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:24,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2022-03-03 18:44:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2022-03-03 18:44:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.120998719590269) internal successors, (14625), 4686 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2022-03-03 18:44:24,272 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2022-03-03 18:44:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:24,272 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2022-03-03 18:44:24,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2022-03-03 18:44:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:24,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:24,278 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:24,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:24,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-03 18:44:24,479 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -666976565, now seen corresponding path program 247 times [2022-03-03 18:44:24,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:24,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876827355] [2022-03-03 18:44:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:24,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:24,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876827355] [2022-03-03 18:44:24,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876827355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:24,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919778959] [2022-03-03 18:44:24,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:24,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:24,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:24,532 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:24,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-03 18:44:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:24,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:24,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919778959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:24,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:24,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 20 [2022-03-03 18:44:24,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217798840] [2022-03-03 18:44:24,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:24,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:24,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:24,710 INFO L87 Difference]: Start difference. First operand 4687 states and 14625 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:25,171 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2022-03-03 18:44:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 18:44:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:25,182 INFO L225 Difference]: With dead ends: 5184 [2022-03-03 18:44:25,182 INFO L226 Difference]: Without dead ends: 5174 [2022-03-03 18:44:25,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 18:44:25,182 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:25,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 140 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2022-03-03 18:44:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2022-03-03 18:44:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 3.1195559350982065) internal successors, (14612), 4684 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2022-03-03 18:44:25,268 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2022-03-03 18:44:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:25,268 INFO L470 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2022-03-03 18:44:25,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2022-03-03 18:44:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:25,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:25,276 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:25,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-03-03 18:44:25,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-03-03 18:44:25,476 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1537580205, now seen corresponding path program 248 times [2022-03-03 18:44:25,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:25,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659661741] [2022-03-03 18:44:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:25,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:25,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:25,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659661741] [2022-03-03 18:44:25,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659661741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:25,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413077924] [2022-03-03 18:44:25,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:25,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:25,530 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:25,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-03 18:44:25,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:25,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:25,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:25,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413077924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:25,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:25,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-03-03 18:44:25,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090812249] [2022-03-03 18:44:25,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:25,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:25,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:25,709 INFO L87 Difference]: Start difference. First operand 4685 states and 14612 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:26,191 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2022-03-03 18:44:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 18:44:26,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:26,202 INFO L225 Difference]: With dead ends: 5658 [2022-03-03 18:44:26,203 INFO L226 Difference]: Without dead ends: 5652 [2022-03-03 18:44:26,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 18:44:26,203 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:26,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 139 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2022-03-03 18:44:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2022-03-03 18:44:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 3.117512479201331) internal successors, (14989), 4808 states have internal predecessors, (14989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2022-03-03 18:44:26,323 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2022-03-03 18:44:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:26,324 INFO L470 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2022-03-03 18:44:26,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2022-03-03 18:44:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:26,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:26,331 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:26,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:26,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:26,532 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1150022197, now seen corresponding path program 249 times [2022-03-03 18:44:26,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:26,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775767828] [2022-03-03 18:44:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:26,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:26,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:26,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775767828] [2022-03-03 18:44:26,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775767828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:26,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589943036] [2022-03-03 18:44:26,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:26,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:26,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:26,583 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:26,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-03 18:44:26,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:44:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:26,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:26,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:26,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589943036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:26,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:26,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-03-03 18:44:26,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083207570] [2022-03-03 18:44:26,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:26,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:26,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:26,757 INFO L87 Difference]: Start difference. First operand 4809 states and 14989 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:27,285 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2022-03-03 18:44:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 18:44:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:27,296 INFO L225 Difference]: With dead ends: 5753 [2022-03-03 18:44:27,296 INFO L226 Difference]: Without dead ends: 5749 [2022-03-03 18:44:27,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 18:44:27,297 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 141 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:27,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 213 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2022-03-03 18:44:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2022-03-03 18:44:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.117513424204874) internal successors, (15095), 4842 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2022-03-03 18:44:27,389 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2022-03-03 18:44:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:27,389 INFO L470 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2022-03-03 18:44:27,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2022-03-03 18:44:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:27,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:27,397 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:27,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:27,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:27,598 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -306236333, now seen corresponding path program 250 times [2022-03-03 18:44:27,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:27,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302958631] [2022-03-03 18:44:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:27,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:27,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302958631] [2022-03-03 18:44:27,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302958631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:27,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067071111] [2022-03-03 18:44:27,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:27,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:27,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:27,647 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:27,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-03 18:44:27,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:27,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:27,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:27,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067071111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:27,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:27,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-03-03 18:44:27,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851223635] [2022-03-03 18:44:27,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:27,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:27,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:27,810 INFO L87 Difference]: Start difference. First operand 4843 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:28,399 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2022-03-03 18:44:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 18:44:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:28,412 INFO L225 Difference]: With dead ends: 6063 [2022-03-03 18:44:28,412 INFO L226 Difference]: Without dead ends: 6063 [2022-03-03 18:44:28,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 18:44:28,413 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 190 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:28,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 211 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2022-03-03 18:44:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2022-03-03 18:44:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 3.125948717948718) internal successors, (15239), 4875 states have internal predecessors, (15239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2022-03-03 18:44:28,526 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2022-03-03 18:44:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:28,526 INFO L470 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2022-03-03 18:44:28,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2022-03-03 18:44:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:28,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:28,534 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:28,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-03-03 18:44:28,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:28,734 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:28,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:28,735 INFO L85 PathProgramCache]: Analyzing trace with hash 265218473, now seen corresponding path program 251 times [2022-03-03 18:44:28,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:28,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746201186] [2022-03-03 18:44:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:28,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:28,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746201186] [2022-03-03 18:44:28,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746201186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:28,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571962925] [2022-03-03 18:44:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:28,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:28,784 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:28,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-03 18:44:28,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:44:28,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:28,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:28,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571962925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:28,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:28,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-03-03 18:44:28,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468013768] [2022-03-03 18:44:28,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:28,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:28,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:28,945 INFO L87 Difference]: Start difference. First operand 4876 states and 15239 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:29,669 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2022-03-03 18:44:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:44:29,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:29,680 INFO L225 Difference]: With dead ends: 5817 [2022-03-03 18:44:29,681 INFO L226 Difference]: Without dead ends: 5808 [2022-03-03 18:44:29,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:44:29,682 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 174 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:29,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 204 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2022-03-03 18:44:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2022-03-03 18:44:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.1192163401417257) internal successors, (14966), 4798 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2022-03-03 18:44:29,774 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2022-03-03 18:44:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2022-03-03 18:44:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2022-03-03 18:44:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:29,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:29,781 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:29,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:29,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:29,982 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash 800448275, now seen corresponding path program 252 times [2022-03-03 18:44:29,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:29,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126522040] [2022-03-03 18:44:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:29,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:30,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:30,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126522040] [2022-03-03 18:44:30,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126522040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:30,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326254635] [2022-03-03 18:44:30,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:30,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:30,039 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:30,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-03 18:44:30,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:44:30,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:30,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:30,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:30,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326254635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:30,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:30,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 20 [2022-03-03 18:44:30,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052106602] [2022-03-03 18:44:30,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:30,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:30,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:30,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:30,212 INFO L87 Difference]: Start difference. First operand 4799 states and 14966 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:30,863 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2022-03-03 18:44:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 18:44:30,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:30,872 INFO L225 Difference]: With dead ends: 5773 [2022-03-03 18:44:30,872 INFO L226 Difference]: Without dead ends: 5755 [2022-03-03 18:44:30,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:44:30,873 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:30,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 158 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-03-03 18:44:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2022-03-03 18:44:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 3.11897174421075) internal successors, (14681), 4707 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2022-03-03 18:44:30,980 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2022-03-03 18:44:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:30,980 INFO L470 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2022-03-03 18:44:30,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2022-03-03 18:44:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:30,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:30,986 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:31,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-03 18:44:31,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-03 18:44:31,187 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash 212702953, now seen corresponding path program 253 times [2022-03-03 18:44:31,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:31,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380310165] [2022-03-03 18:44:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:31,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:31,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380310165] [2022-03-03 18:44:31,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380310165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:31,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266131760] [2022-03-03 18:44:31,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:31,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:31,245 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:31,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-03 18:44:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:31,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:31,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:31,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266131760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:31,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:31,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-03-03 18:44:31,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454418886] [2022-03-03 18:44:31,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:31,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:44:31,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:44:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:44:31,412 INFO L87 Difference]: Start difference. First operand 4708 states and 14681 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:32,015 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2022-03-03 18:44:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 18:44:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:32,027 INFO L225 Difference]: With dead ends: 5582 [2022-03-03 18:44:32,027 INFO L226 Difference]: Without dead ends: 5564 [2022-03-03 18:44:32,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:44:32,028 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:32,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 152 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2022-03-03 18:44:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2022-03-03 18:44:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 3.119737677173683) internal successors, (14747), 4727 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2022-03-03 18:44:32,117 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2022-03-03 18:44:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:32,118 INFO L470 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2022-03-03 18:44:32,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2022-03-03 18:44:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:32,125 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:32,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-03-03 18:44:32,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:32,328 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2041196153, now seen corresponding path program 254 times [2022-03-03 18:44:32,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:32,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323237203] [2022-03-03 18:44:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:32,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:32,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:32,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323237203] [2022-03-03 18:44:32,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323237203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:32,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424781381] [2022-03-03 18:44:32,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:32,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:32,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:32,389 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:32,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-03 18:44:32,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:32,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:32,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:32,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424781381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:32,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:32,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-03-03 18:44:32,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227526947] [2022-03-03 18:44:32,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:32,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:44:32,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:44:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:44:32,580 INFO L87 Difference]: Start difference. First operand 4728 states and 14747 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:33,148 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2022-03-03 18:44:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:44:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:33,158 INFO L225 Difference]: With dead ends: 5063 [2022-03-03 18:44:33,158 INFO L226 Difference]: Without dead ends: 5063 [2022-03-03 18:44:33,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 18:44:33,159 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:33,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 134 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2022-03-03 18:44:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2022-03-03 18:44:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.118311660626732) internal successors, (14628), 4691 states have internal predecessors, (14628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2022-03-03 18:44:33,259 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2022-03-03 18:44:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:33,260 INFO L470 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2022-03-03 18:44:33,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2022-03-03 18:44:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:33,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:33,267 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:33,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-03 18:44:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-03 18:44:33,468 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 517271431, now seen corresponding path program 255 times [2022-03-03 18:44:33,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:33,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149279087] [2022-03-03 18:44:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:33,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:33,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:33,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149279087] [2022-03-03 18:44:33,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149279087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:33,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794484049] [2022-03-03 18:44:33,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:33,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:33,521 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:33,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-03 18:44:33,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:44:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:33,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:33,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:33,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794484049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:33,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:33,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2022-03-03 18:44:33,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840723284] [2022-03-03 18:44:33,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:44:33,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:44:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:44:33,701 INFO L87 Difference]: Start difference. First operand 4692 states and 14628 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:34,261 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2022-03-03 18:44:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 18:44:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:34,272 INFO L225 Difference]: With dead ends: 5220 [2022-03-03 18:44:34,272 INFO L226 Difference]: Without dead ends: 5210 [2022-03-03 18:44:34,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 18:44:34,272 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:34,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 222 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2022-03-03 18:44:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2022-03-03 18:44:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4588 states have (on average 3.1200959023539667) internal successors, (14315), 4588 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2022-03-03 18:44:34,355 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2022-03-03 18:44:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2022-03-03 18:44:34,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2022-03-03 18:44:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:34,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:34,363 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:34,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-03 18:44:34,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-03 18:44:34,563 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash 184160647, now seen corresponding path program 256 times [2022-03-03 18:44:34,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:34,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074087427] [2022-03-03 18:44:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:34,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:34,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074087427] [2022-03-03 18:44:34,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074087427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:34,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65453517] [2022-03-03 18:44:34,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:34,612 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:34,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-03 18:44:34,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:34,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:34,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65453517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:34,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:34,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 20 [2022-03-03 18:44:34,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990353926] [2022-03-03 18:44:34,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:34,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:34,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:34,789 INFO L87 Difference]: Start difference. First operand 4589 states and 14315 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:35,337 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2022-03-03 18:44:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:44:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:35,349 INFO L225 Difference]: With dead ends: 5724 [2022-03-03 18:44:35,349 INFO L226 Difference]: Without dead ends: 5718 [2022-03-03 18:44:35,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:44:35,350 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:35,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 287 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:35,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2022-03-03 18:44:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2022-03-03 18:44:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 3.118923611111111) internal successors, (14372), 4608 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2022-03-03 18:44:35,468 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2022-03-03 18:44:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:35,468 INFO L470 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2022-03-03 18:44:35,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2022-03-03 18:44:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:35,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:35,476 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:35,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-03 18:44:35,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-03 18:44:35,676 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:35,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1420341127, now seen corresponding path program 257 times [2022-03-03 18:44:35,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:35,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605239129] [2022-03-03 18:44:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:35,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:35,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:35,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605239129] [2022-03-03 18:44:35,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605239129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:35,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296623869] [2022-03-03 18:44:35,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:35,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:35,724 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:35,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-03 18:44:35,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:44:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:35,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:35,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:35,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296623869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:35,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:35,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-03-03 18:44:35,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90511439] [2022-03-03 18:44:35,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:35,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:35,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:35,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:35,902 INFO L87 Difference]: Start difference. First operand 4609 states and 14372 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:36,448 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2022-03-03 18:44:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:44:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:36,461 INFO L225 Difference]: With dead ends: 6302 [2022-03-03 18:44:36,461 INFO L226 Difference]: Without dead ends: 6300 [2022-03-03 18:44:36,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 18:44:36,462 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:36,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 225 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2022-03-03 18:44:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2022-03-03 18:44:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.1176590538336053) internal successors, (15289), 4904 states have internal predecessors, (15289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2022-03-03 18:44:36,563 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2022-03-03 18:44:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:36,563 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2022-03-03 18:44:36,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2022-03-03 18:44:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:36,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:36,570 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:36,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-03 18:44:36,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-03-03 18:44:36,771 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash -340897401, now seen corresponding path program 258 times [2022-03-03 18:44:36,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:36,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585339999] [2022-03-03 18:44:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:36,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:36,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:36,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585339999] [2022-03-03 18:44:36,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585339999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:36,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270444090] [2022-03-03 18:44:36,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:36,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:36,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:36,816 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:36,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-03 18:44:36,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:44:36,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:36,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:36,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:36,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270444090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:36,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:36,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-03-03 18:44:36,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639515212] [2022-03-03 18:44:36,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:36,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:36,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:36,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:36,985 INFO L87 Difference]: Start difference. First operand 4905 states and 15289 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:37,506 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2022-03-03 18:44:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 18:44:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:37,518 INFO L225 Difference]: With dead ends: 6307 [2022-03-03 18:44:37,519 INFO L226 Difference]: Without dead ends: 6307 [2022-03-03 18:44:37,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:44:37,519 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 196 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:37,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 177 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2022-03-03 18:44:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2022-03-03 18:44:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 3.1271336080047085) internal successors, (15939), 5097 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2022-03-03 18:44:37,603 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2022-03-03 18:44:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:37,604 INFO L470 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2022-03-03 18:44:37,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2022-03-03 18:44:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:37,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:37,611 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:37,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-03 18:44:37,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:37,811 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 230557405, now seen corresponding path program 259 times [2022-03-03 18:44:37,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:37,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996619016] [2022-03-03 18:44:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:37,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:37,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:37,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996619016] [2022-03-03 18:44:37,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996619016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:37,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102489100] [2022-03-03 18:44:37,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:37,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:37,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:37,857 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:37,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-03 18:44:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:37,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:38,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:38,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102489100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:38,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:38,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-03-03 18:44:38,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662059511] [2022-03-03 18:44:38,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:38,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:38,058 INFO L87 Difference]: Start difference. First operand 5098 states and 15939 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:38,836 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2022-03-03 18:44:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 18:44:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:38,845 INFO L225 Difference]: With dead ends: 6203 [2022-03-03 18:44:38,845 INFO L226 Difference]: Without dead ends: 6194 [2022-03-03 18:44:38,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 18:44:38,846 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 176 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:38,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 189 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2022-03-03 18:44:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2022-03-03 18:44:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 3.122859418558343) internal successors, (15683), 5022 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2022-03-03 18:44:38,918 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2022-03-03 18:44:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:38,918 INFO L470 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2022-03-03 18:44:38,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2022-03-03 18:44:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:38,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:38,924 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:38,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-03-03 18:44:39,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:39,125 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash 765787207, now seen corresponding path program 260 times [2022-03-03 18:44:39,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:39,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234334875] [2022-03-03 18:44:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:39,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:39,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:39,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234334875] [2022-03-03 18:44:39,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234334875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:39,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751338442] [2022-03-03 18:44:39,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:39,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:39,173 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:39,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-03 18:44:39,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:39,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:39,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751338442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:39,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:39,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 20 [2022-03-03 18:44:39,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650052406] [2022-03-03 18:44:39,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:39,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:39,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:39,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:39,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:39,341 INFO L87 Difference]: Start difference. First operand 5023 states and 15683 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:40,015 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2022-03-03 18:44:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:44:40,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:40,025 INFO L225 Difference]: With dead ends: 6188 [2022-03-03 18:44:40,026 INFO L226 Difference]: Without dead ends: 6176 [2022-03-03 18:44:40,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:44:40,027 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 209 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:40,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 151 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2022-03-03 18:44:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2022-03-03 18:44:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 3.1220535357570913) internal successors, (15629), 5006 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2022-03-03 18:44:40,109 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2022-03-03 18:44:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:40,109 INFO L470 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2022-03-03 18:44:40,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2022-03-03 18:44:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:40,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:40,116 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:40,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-03-03 18:44:40,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:40,317 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash 178041885, now seen corresponding path program 261 times [2022-03-03 18:44:40,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:40,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154270735] [2022-03-03 18:44:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:40,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:40,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:40,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154270735] [2022-03-03 18:44:40,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154270735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:40,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698867820] [2022-03-03 18:44:40,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:40,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:40,373 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:40,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-03 18:44:40,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:44:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:40,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:40,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698867820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:40,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:40,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2022-03-03 18:44:40,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014264089] [2022-03-03 18:44:40,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:40,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:44:40,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:44:40,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:44:40,553 INFO L87 Difference]: Start difference. First operand 5007 states and 15629 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:41,266 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2022-03-03 18:44:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:44:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:41,278 INFO L225 Difference]: With dead ends: 6237 [2022-03-03 18:44:41,278 INFO L226 Difference]: Without dead ends: 6219 [2022-03-03 18:44:41,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:44:41,279 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 200 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:41,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 177 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2022-03-03 18:44:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2022-03-03 18:44:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 3.1240047770700636) internal successors, (15695), 5024 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2022-03-03 18:44:41,385 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2022-03-03 18:44:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:41,385 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2022-03-03 18:44:41,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2022-03-03 18:44:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:41,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:41,393 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:41,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-03 18:44:41,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:41,593 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash -862193913, now seen corresponding path program 262 times [2022-03-03 18:44:41,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:41,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135293469] [2022-03-03 18:44:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:41,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:41,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135293469] [2022-03-03 18:44:41,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135293469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:41,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078714071] [2022-03-03 18:44:41,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:41,654 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-03 18:44:41,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:41,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:41,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078714071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:41,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:41,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-03-03 18:44:41,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714960556] [2022-03-03 18:44:41,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:41,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:44:41,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:41,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:44:41,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:44:41,834 INFO L87 Difference]: Start difference. First operand 5025 states and 15695 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:42,439 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2022-03-03 18:44:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 18:44:42,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:42,452 INFO L225 Difference]: With dead ends: 6089 [2022-03-03 18:44:42,452 INFO L226 Difference]: Without dead ends: 6065 [2022-03-03 18:44:42,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:44:42,453 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:42,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 147 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2022-03-03 18:44:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2022-03-03 18:44:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 3.125619179710719) internal successors, (15775), 5047 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2022-03-03 18:44:42,551 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2022-03-03 18:44:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:42,551 INFO L470 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2022-03-03 18:44:42,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2022-03-03 18:44:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:42,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:42,559 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:42,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-03 18:44:42,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-03-03 18:44:42,759 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash -823805741, now seen corresponding path program 263 times [2022-03-03 18:44:42,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:42,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469969280] [2022-03-03 18:44:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:42,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:42,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:42,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469969280] [2022-03-03 18:44:42,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469969280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:42,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298383084] [2022-03-03 18:44:42,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:42,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:42,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:42,841 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:42,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-03 18:44:42,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:44:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:43,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:43,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298383084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:43,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:43,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-03-03 18:44:43,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450537600] [2022-03-03 18:44:43,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:43,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:44:43,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:44:43,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:44:43,043 INFO L87 Difference]: Start difference. First operand 5048 states and 15775 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:43,622 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2022-03-03 18:44:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:44:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:43,634 INFO L225 Difference]: With dead ends: 5685 [2022-03-03 18:44:43,634 INFO L226 Difference]: Without dead ends: 5685 [2022-03-03 18:44:43,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 18:44:43,635 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:43,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 117 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2022-03-03 18:44:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2022-03-03 18:44:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 3.1196547665751275) internal successors, (15904), 5098 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2022-03-03 18:44:43,758 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2022-03-03 18:44:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:43,758 INFO L470 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2022-03-03 18:44:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2022-03-03 18:44:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:43,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:43,766 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:43,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-03 18:44:43,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:43,975 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1425746357, now seen corresponding path program 264 times [2022-03-03 18:44:43,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:43,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908870123] [2022-03-03 18:44:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:44,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:44,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908870123] [2022-03-03 18:44:44,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908870123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:44,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619279079] [2022-03-03 18:44:44,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:44,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:44,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:44,036 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:44,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-03 18:44:44,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:44:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:44,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:44,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619279079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:44,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:44,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 22 [2022-03-03 18:44:44,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973534514] [2022-03-03 18:44:44,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:44,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:44:44,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:44:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:44:44,239 INFO L87 Difference]: Start difference. First operand 5099 states and 15904 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:44,752 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2022-03-03 18:44:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:44:44,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:44,762 INFO L225 Difference]: With dead ends: 6196 [2022-03-03 18:44:44,762 INFO L226 Difference]: Without dead ends: 6196 [2022-03-03 18:44:44,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 18:44:44,763 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 150 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:44,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 238 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2022-03-03 18:44:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2022-03-03 18:44:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.119420068676078) internal successors, (16352), 5242 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2022-03-03 18:44:44,843 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2022-03-03 18:44:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:44,843 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2022-03-03 18:44:44,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2022-03-03 18:44:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:44,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:44,850 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:44,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:45,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-03 18:44:45,051 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2018519507, now seen corresponding path program 265 times [2022-03-03 18:44:45,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:45,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021672306] [2022-03-03 18:44:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:45,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:45,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021672306] [2022-03-03 18:44:45,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021672306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:45,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120450343] [2022-03-03 18:44:45,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:45,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:45,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:45,109 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-03 18:44:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:45,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:45,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120450343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:45,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:45,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2022-03-03 18:44:45,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044604263] [2022-03-03 18:44:45,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:45,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:44:45,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:44:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:44:45,286 INFO L87 Difference]: Start difference. First operand 5243 states and 16352 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:45,818 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2022-03-03 18:44:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 18:44:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:45,829 INFO L225 Difference]: With dead ends: 6611 [2022-03-03 18:44:45,830 INFO L226 Difference]: Without dead ends: 6611 [2022-03-03 18:44:45,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 18:44:45,830 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 160 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:45,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 300 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2022-03-03 18:44:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2022-03-03 18:44:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 3.1225055432372506) internal successors, (16899), 5412 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2022-03-03 18:44:45,919 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2022-03-03 18:44:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:45,919 INFO L470 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2022-03-03 18:44:45,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2022-03-03 18:44:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:45,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:45,928 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:45,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-03-03 18:44:46,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-03 18:44:46,128 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash -502774453, now seen corresponding path program 266 times [2022-03-03 18:44:46,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:46,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927418457] [2022-03-03 18:44:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:46,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:46,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:46,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927418457] [2022-03-03 18:44:46,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927418457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:46,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915850491] [2022-03-03 18:44:46,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:46,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:46,173 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:46,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-03 18:44:46,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:46,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:46,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:46,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:46,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:46,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915850491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:46,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:46,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 20 [2022-03-03 18:44:46,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237396691] [2022-03-03 18:44:46,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:46,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:46,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:46,356 INFO L87 Difference]: Start difference. First operand 5413 states and 16899 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:46,934 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2022-03-03 18:44:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 18:44:46,934 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:46,948 INFO L225 Difference]: With dead ends: 7182 [2022-03-03 18:44:46,948 INFO L226 Difference]: Without dead ends: 7182 [2022-03-03 18:44:46,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:44:46,949 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 182 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:46,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 236 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2022-03-03 18:44:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2022-03-03 18:44:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.128416257883672) internal successors, (17857), 5708 states have internal predecessors, (17857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2022-03-03 18:44:47,055 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2022-03-03 18:44:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:47,055 INFO L470 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2022-03-03 18:44:47,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2022-03-03 18:44:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:47,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:47,064 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:47,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-03 18:44:47,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-03 18:44:47,265 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1415390509, now seen corresponding path program 267 times [2022-03-03 18:44:47,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:47,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419146585] [2022-03-03 18:44:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:47,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:47,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:47,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419146585] [2022-03-03 18:44:47,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419146585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:47,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118543697] [2022-03-03 18:44:47,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:47,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:47,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:47,306 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:47,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-03 18:44:47,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:44:47,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:47,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:47,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:47,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118543697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:47,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:47,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-03-03 18:44:47,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314238810] [2022-03-03 18:44:47,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:47,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:47,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:47,480 INFO L87 Difference]: Start difference. First operand 5709 states and 17857 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:48,023 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2022-03-03 18:44:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 18:44:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:48,042 INFO L225 Difference]: With dead ends: 8455 [2022-03-03 18:44:48,043 INFO L226 Difference]: Without dead ends: 8455 [2022-03-03 18:44:48,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 18:44:48,043 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:48,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 192 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2022-03-03 18:44:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2022-03-03 18:44:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6969 states have (on average 3.147366910604104) internal successors, (21934), 6969 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2022-03-03 18:44:48,203 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2022-03-03 18:44:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:48,203 INFO L470 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2022-03-03 18:44:48,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2022-03-03 18:44:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:48,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:48,215 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:48,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-03-03 18:44:48,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:48,415 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:48,415 INFO L85 PathProgramCache]: Analyzing trace with hash -843935703, now seen corresponding path program 268 times [2022-03-03 18:44:48,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:48,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425577770] [2022-03-03 18:44:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:48,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:48,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425577770] [2022-03-03 18:44:48,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425577770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:48,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962781749] [2022-03-03 18:44:48,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:48,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:48,457 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:48,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-03 18:44:48,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:48,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:48,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:48,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:48,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:48,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962781749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:48,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:48,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-03-03 18:44:48,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006507832] [2022-03-03 18:44:48,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:48,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:44:48,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:44:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:44:48,633 INFO L87 Difference]: Start difference. First operand 6970 states and 21934 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:49,541 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2022-03-03 18:44:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 18:44:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:49,560 INFO L225 Difference]: With dead ends: 8123 [2022-03-03 18:44:49,560 INFO L226 Difference]: Without dead ends: 8117 [2022-03-03 18:44:49,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 18:44:49,561 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:49,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 169 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2022-03-03 18:44:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2022-03-03 18:44:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 3.1440323278972433) internal successors, (21785), 6929 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2022-03-03 18:44:49,715 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2022-03-03 18:44:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:49,716 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2022-03-03 18:44:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2022-03-03 18:44:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:49,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:49,728 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:49,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-03-03 18:44:49,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:49,928 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash -308705901, now seen corresponding path program 269 times [2022-03-03 18:44:49,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:49,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009386385] [2022-03-03 18:44:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:49,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:49,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009386385] [2022-03-03 18:44:49,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009386385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:49,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833734196] [2022-03-03 18:44:49,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:49,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:49,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:49,974 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:49,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-03 18:44:49,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:44:49,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:49,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:50,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:50,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833734196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:50,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:50,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 20 [2022-03-03 18:44:50,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245359666] [2022-03-03 18:44:50,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:50,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:44:50,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:44:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:44:50,150 INFO L87 Difference]: Start difference. First operand 6930 states and 21785 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:50,974 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2022-03-03 18:44:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 18:44:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:50,993 INFO L225 Difference]: With dead ends: 8123 [2022-03-03 18:44:50,993 INFO L226 Difference]: Without dead ends: 8111 [2022-03-03 18:44:50,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 18:44:50,994 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 202 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:50,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 175 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2022-03-03 18:44:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2022-03-03 18:44:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 3.1453941669073058) internal successors, (21785), 6926 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2022-03-03 18:44:51,207 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2022-03-03 18:44:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:51,207 INFO L470 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2022-03-03 18:44:51,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2022-03-03 18:44:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:51,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:51,219 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:51,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:51,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-03 18:44:51,420 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash -896451223, now seen corresponding path program 270 times [2022-03-03 18:44:51,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:51,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156466847] [2022-03-03 18:44:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:51,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:51,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156466847] [2022-03-03 18:44:51,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156466847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:51,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455057030] [2022-03-03 18:44:51,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:44:51,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:51,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:51,471 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:51,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-03 18:44:51,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:44:51,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:51,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:51,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:51,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455057030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:51,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:51,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2022-03-03 18:44:51,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640710431] [2022-03-03 18:44:51,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:51,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:44:51,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:44:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:44:51,653 INFO L87 Difference]: Start difference. First operand 6927 states and 21785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:52,402 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2022-03-03 18:44:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 18:44:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:52,419 INFO L225 Difference]: With dead ends: 8230 [2022-03-03 18:44:52,420 INFO L226 Difference]: Without dead ends: 8212 [2022-03-03 18:44:52,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 18:44:52,421 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 188 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:52,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 194 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2022-03-03 18:44:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2022-03-03 18:44:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.148927159796725) internal successors, (22307), 7084 states have internal predecessors, (22307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2022-03-03 18:44:52,573 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2022-03-03 18:44:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:52,573 INFO L470 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2022-03-03 18:44:52,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2022-03-03 18:44:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:52,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:52,585 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:52,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-03-03 18:44:52,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:52,785 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1936687021, now seen corresponding path program 271 times [2022-03-03 18:44:52,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:52,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020352574] [2022-03-03 18:44:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:52,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:52,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:52,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020352574] [2022-03-03 18:44:52,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020352574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:52,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599374110] [2022-03-03 18:44:52,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:44:52,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:52,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:52,843 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:52,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-03 18:44:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:52,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:52,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:44:53,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599374110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:53,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:53,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 22 [2022-03-03 18:44:53,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187330456] [2022-03-03 18:44:53,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:53,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:44:53,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:44:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:44:53,031 INFO L87 Difference]: Start difference. First operand 7085 states and 22307 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:53,681 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2022-03-03 18:44:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 18:44:53,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:53,695 INFO L225 Difference]: With dead ends: 8473 [2022-03-03 18:44:53,696 INFO L226 Difference]: Without dead ends: 8449 [2022-03-03 18:44:53,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:44:53,696 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 185 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:53,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 164 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2022-03-03 18:44:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2022-03-03 18:44:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7304 states have (on average 3.1519715224534504) internal successors, (23022), 7304 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2022-03-03 18:44:53,840 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2022-03-03 18:44:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:53,840 INFO L470 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2022-03-03 18:44:53,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2022-03-03 18:44:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 18:44:53,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:53,851 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:53,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-03 18:44:54,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:54,051 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash 175741609, now seen corresponding path program 272 times [2022-03-03 18:44:54,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:54,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175503218] [2022-03-03 18:44:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:54,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:54,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:54,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175503218] [2022-03-03 18:44:54,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175503218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:54,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853232642] [2022-03-03 18:44:54,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:44:54,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:54,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:54,112 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:54,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-03 18:44:54,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:44:54,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 18:44:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:54,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:54,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853232642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:54,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:54,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-03-03 18:44:54,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528847627] [2022-03-03 18:44:54,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:54,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:44:54,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:54,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:44:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:44:54,305 INFO L87 Difference]: Start difference. First operand 7305 states and 23022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:54,924 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2022-03-03 18:44:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 18:44:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 18:44:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:54,943 INFO L225 Difference]: With dead ends: 8382 [2022-03-03 18:44:54,943 INFO L226 Difference]: Without dead ends: 8352 [2022-03-03 18:44:54,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:44:54,944 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 157 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:54,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 159 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:44:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2022-03-03 18:44:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2022-03-03 18:44:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.1509793253536453) internal successors, (23166), 7352 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2022-03-03 18:44:55,101 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2022-03-03 18:44:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:55,101 INFO L470 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2022-03-03 18:44:55,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2022-03-03 18:44:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:44:55,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:55,114 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:55,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:55,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-03-03 18:44:55,314 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1983045351, now seen corresponding path program 273 times [2022-03-03 18:44:55,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:55,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678443352] [2022-03-03 18:44:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:55,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:55,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:55,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678443352] [2022-03-03 18:44:55,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678443352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:55,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379677148] [2022-03-03 18:44:55,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:44:55,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:55,509 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:55,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-03 18:44:55,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:44:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:44:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:55,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:56,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379677148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:56,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:56,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-03-03 18:44:56,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48593122] [2022-03-03 18:44:56,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:56,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:44:56,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:44:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:44:56,102 INFO L87 Difference]: Start difference. First operand 7353 states and 23166 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:56,801 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2022-03-03 18:44:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:44:56,801 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:44:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:56,818 INFO L225 Difference]: With dead ends: 7724 [2022-03-03 18:44:56,818 INFO L226 Difference]: Without dead ends: 7695 [2022-03-03 18:44:56,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:44:56,818 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 167 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:56,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 777 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:44:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2022-03-03 18:44:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2022-03-03 18:44:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.140099878526117) internal successors, (23265), 7409 states have internal predecessors, (23265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2022-03-03 18:44:56,967 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2022-03-03 18:44:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:56,967 INFO L470 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2022-03-03 18:44:56,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2022-03-03 18:44:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:44:56,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:56,980 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:56,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-03-03 18:44:57,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:57,181 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1192842795, now seen corresponding path program 274 times [2022-03-03 18:44:57,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:57,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351585304] [2022-03-03 18:44:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:57,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:57,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:57,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351585304] [2022-03-03 18:44:57,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351585304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:57,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312991869] [2022-03-03 18:44:57,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:44:57,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:57,334 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:57,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-03 18:44:57,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:44:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:44:57,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:57,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:57,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312991869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:57,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:57,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-03 18:44:57,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292912171] [2022-03-03 18:44:57,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:57,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:44:57,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:44:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:44:57,964 INFO L87 Difference]: Start difference. First operand 7410 states and 23265 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:44:58,473 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2022-03-03 18:44:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:44:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:44:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:44:58,490 INFO L225 Difference]: With dead ends: 7815 [2022-03-03 18:44:58,490 INFO L226 Difference]: Without dead ends: 7808 [2022-03-03 18:44:58,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:44:58,491 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 215 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:44:58,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 730 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:44:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2022-03-03 18:44:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2022-03-03 18:44:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.1443985613427468) internal successors, (23605), 7507 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2022-03-03 18:44:58,673 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2022-03-03 18:44:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:44:58,673 INFO L470 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2022-03-03 18:44:58,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:44:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2022-03-03 18:44:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:44:58,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:44:58,686 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:44:58,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-03-03 18:44:58,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-03 18:44:58,886 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:44:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:44:58,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1487421777, now seen corresponding path program 275 times [2022-03-03 18:44:58,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:44:58,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555942412] [2022-03-03 18:44:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:44:58,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:44:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:44:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:59,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:44:59,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555942412] [2022-03-03 18:44:59,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555942412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:44:59,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143060405] [2022-03-03 18:44:59,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:44:59,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:44:59,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:44:59,045 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:44:59,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-03 18:44:59,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:44:59,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:44:59,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:44:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:44:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:59,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:44:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:44:59,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143060405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:44:59,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:44:59,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-03 18:44:59,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130161795] [2022-03-03 18:44:59,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:44:59,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:44:59,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:44:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:44:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:44:59,691 INFO L87 Difference]: Start difference. First operand 7508 states and 23605 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:45:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:00,305 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2022-03-03 18:45:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:45:00,305 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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 23 [2022-03-03 18:45:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:00,322 INFO L225 Difference]: With dead ends: 7801 [2022-03-03 18:45:00,322 INFO L226 Difference]: Without dead ends: 7785 [2022-03-03 18:45:00,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:45:00,323 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 175 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:00,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 860 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2022-03-03 18:45:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2022-03-03 18:45:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-03-03 18:45:00,532 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-03-03 18:45:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:00,532 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-03-03 18:45:00,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:45:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-03-03 18:45:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:00,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:00,544 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:00,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-03 18:45:00,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-03 18:45:00,745 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1764297601, now seen corresponding path program 276 times [2022-03-03 18:45:00,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:00,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318218295] [2022-03-03 18:45:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:00,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:00,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318218295] [2022-03-03 18:45:00,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318218295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:00,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573308993] [2022-03-03 18:45:00,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:45:00,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:00,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:00,901 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:00,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-03 18:45:00,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:45:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:00,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:01,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:01,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573308993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:01,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:01,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-03 18:45:01,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274107893] [2022-03-03 18:45:01,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:01,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:01,555 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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) [2022-03-03 18:45:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:02,083 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2022-03-03 18:45:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:45:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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 23 [2022-03-03 18:45:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:02,098 INFO L225 Difference]: With dead ends: 7734 [2022-03-03 18:45:02,098 INFO L226 Difference]: Without dead ends: 7727 [2022-03-03 18:45:02,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:45:02,098 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 166 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:02,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 726 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2022-03-03 18:45:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2022-03-03 18:45:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-03-03 18:45:02,224 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-03-03 18:45:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:02,224 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-03-03 18:45:02,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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) [2022-03-03 18:45:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-03-03 18:45:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:02,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:02,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:02,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-03 18:45:02,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-03 18:45:02,436 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1995439893, now seen corresponding path program 277 times [2022-03-03 18:45:02,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:02,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428393549] [2022-03-03 18:45:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:02,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:02,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428393549] [2022-03-03 18:45:02,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428393549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:02,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835822761] [2022-03-03 18:45:02,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:45:02,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:02,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:02,595 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:02,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-03 18:45:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:02,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:02,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:03,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835822761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:03,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:03,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-03-03 18:45:03,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125461625] [2022-03-03 18:45:03,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:03,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:45:03,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:03,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:45:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:45:03,253 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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) [2022-03-03 18:45:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:03,850 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2022-03-03 18:45:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:45:03,850 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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 23 [2022-03-03 18:45:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:03,867 INFO L225 Difference]: With dead ends: 7751 [2022-03-03 18:45:03,867 INFO L226 Difference]: Without dead ends: 7744 [2022-03-03 18:45:03,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:45:03,868 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 209 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:03,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 763 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2022-03-03 18:45:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2022-03-03 18:45:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-03-03 18:45:04,023 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-03-03 18:45:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:04,023 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-03-03 18:45:04,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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) [2022-03-03 18:45:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-03-03 18:45:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:04,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:04,036 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:04,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-03 18:45:04,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:04,237 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1711782081, now seen corresponding path program 278 times [2022-03-03 18:45:04,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:04,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296724850] [2022-03-03 18:45:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:04,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:04,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296724850] [2022-03-03 18:45:04,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296724850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:04,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120183851] [2022-03-03 18:45:04,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:45:04,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:04,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:04,407 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:04,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-03 18:45:04,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:45:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:04,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:05,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120183851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:05,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:05,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-03-03 18:45:05,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398415193] [2022-03-03 18:45:05,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:05,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 18:45:05,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 18:45:05,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:45:05,002 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:05,633 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2022-03-03 18:45:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:45:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:05,647 INFO L225 Difference]: With dead ends: 7771 [2022-03-03 18:45:05,647 INFO L226 Difference]: Without dead ends: 7764 [2022-03-03 18:45:05,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:45:05,647 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 206 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:05,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 732 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2022-03-03 18:45:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2022-03-03 18:45:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-03-03 18:45:05,774 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-03-03 18:45:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:05,774 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-03-03 18:45:05,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-03-03 18:45:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:05,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:05,785 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:05,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-03 18:45:05,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:05,986 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash 671546283, now seen corresponding path program 279 times [2022-03-03 18:45:05,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:05,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244506568] [2022-03-03 18:45:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:05,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:06,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:06,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244506568] [2022-03-03 18:45:06,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244506568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:06,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276307910] [2022-03-03 18:45:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:45:06,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:06,157 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:06,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-03 18:45:06,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:45:06,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:06,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:06,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:06,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276307910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:06,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:06,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-03-03 18:45:06,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585459330] [2022-03-03 18:45:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:06,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:45:06,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:45:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:45:06,768 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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) [2022-03-03 18:45:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:07,472 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2022-03-03 18:45:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:45:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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 23 [2022-03-03 18:45:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:07,489 INFO L225 Difference]: With dead ends: 7671 [2022-03-03 18:45:07,489 INFO L226 Difference]: Without dead ends: 7664 [2022-03-03 18:45:07,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:45:07,490 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 154 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:07,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 808 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2022-03-03 18:45:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2022-03-03 18:45:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-03-03 18:45:07,672 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-03-03 18:45:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:07,672 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-03-03 18:45:07,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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) [2022-03-03 18:45:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-03-03 18:45:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:07,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:07,685 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:07,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-03 18:45:07,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-03 18:45:07,885 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:07,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1836712423, now seen corresponding path program 280 times [2022-03-03 18:45:07,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:07,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843401102] [2022-03-03 18:45:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:08,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:08,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843401102] [2022-03-03 18:45:08,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843401102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:08,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212841171] [2022-03-03 18:45:08,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:45:08,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:08,037 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:08,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-03 18:45:08,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:45:08,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:08,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:08,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212841171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:08,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:08,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 30 [2022-03-03 18:45:08,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494358171] [2022-03-03 18:45:08,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:08,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:45:08,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:45:08,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:45:08,707 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:09,087 INFO L93 Difference]: Finished difference Result 7746 states and 24061 transitions. [2022-03-03 18:45:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:45:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:09,106 INFO L225 Difference]: With dead ends: 7746 [2022-03-03 18:45:09,106 INFO L226 Difference]: Without dead ends: 7739 [2022-03-03 18:45:09,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:09,106 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 205 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:09,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 530 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:45:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2022-03-03 18:45:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7502. [2022-03-03 18:45:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1463804826023196) internal successors, (23601), 7501 states have internal predecessors, (23601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23601 transitions. [2022-03-03 18:45:09,263 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23601 transitions. Word has length 23 [2022-03-03 18:45:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 23601 transitions. [2022-03-03 18:45:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23601 transitions. [2022-03-03 18:45:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:09,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:09,276 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:09,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-03-03 18:45:09,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:09,477 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash -843552149, now seen corresponding path program 281 times [2022-03-03 18:45:09,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:09,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180460155] [2022-03-03 18:45:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:09,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:09,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180460155] [2022-03-03 18:45:09,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180460155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:09,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552906081] [2022-03-03 18:45:09,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:45:09,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:09,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:09,637 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:09,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-03 18:45:09,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:45:09,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:09,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:10,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552906081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:10,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:10,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 31 [2022-03-03 18:45:10,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83034285] [2022-03-03 18:45:10,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:10,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:45:10,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:45:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:45:10,344 INFO L87 Difference]: Start difference. First operand 7502 states and 23601 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:10,791 INFO L93 Difference]: Finished difference Result 7747 states and 24058 transitions. [2022-03-03 18:45:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:45:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:10,808 INFO L225 Difference]: With dead ends: 7747 [2022-03-03 18:45:10,808 INFO L226 Difference]: Without dead ends: 7738 [2022-03-03 18:45:10,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:10,809 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 166 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:10,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 606 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:45:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2022-03-03 18:45:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7502. [2022-03-03 18:45:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2022-03-03 18:45:10,968 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2022-03-03 18:45:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:10,968 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2022-03-03 18:45:10,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2022-03-03 18:45:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:10,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:10,981 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:10,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-03 18:45:11,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:11,182 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1372121319, now seen corresponding path program 282 times [2022-03-03 18:45:11,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:11,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664856307] [2022-03-03 18:45:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:11,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:11,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664856307] [2022-03-03 18:45:11,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664856307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:11,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299282549] [2022-03-03 18:45:11,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:45:11,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:11,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:11,345 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:11,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-03 18:45:11,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 18:45:11,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:11,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:11,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:11,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299282549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:11,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:11,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-03-03 18:45:11,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216931830] [2022-03-03 18:45:11,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:11,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:11,987 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:12,416 INFO L93 Difference]: Finished difference Result 7686 states and 23919 transitions. [2022-03-03 18:45:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:45:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:12,429 INFO L225 Difference]: With dead ends: 7686 [2022-03-03 18:45:12,430 INFO L226 Difference]: Without dead ends: 7679 [2022-03-03 18:45:12,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:12,430 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:12,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 651 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:45:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2022-03-03 18:45:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7502. [2022-03-03 18:45:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2022-03-03 18:45:12,604 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2022-03-03 18:45:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:12,604 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2022-03-03 18:45:12,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2022-03-03 18:45:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:12,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:12,617 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:12,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-03 18:45:12,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:12,818 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 321834411, now seen corresponding path program 283 times [2022-03-03 18:45:12,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:12,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846941190] [2022-03-03 18:45:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:12,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:12,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846941190] [2022-03-03 18:45:12,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846941190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:12,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871898533] [2022-03-03 18:45:12,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:45:12,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:12,964 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:12,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-03 18:45:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:13,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:13,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871898533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:13,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:13,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 30 [2022-03-03 18:45:13,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378659223] [2022-03-03 18:45:13,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:13,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:45:13,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:45:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:45:13,673 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-03-03 18:45:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:14,262 INFO L93 Difference]: Finished difference Result 8082 states and 25035 transitions. [2022-03-03 18:45:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:45:14,262 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 23 [2022-03-03 18:45:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:14,278 INFO L225 Difference]: With dead ends: 8082 [2022-03-03 18:45:14,279 INFO L226 Difference]: Without dead ends: 8065 [2022-03-03 18:45:14,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:14,279 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:14,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 888 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-03-03 18:45:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7691. [2022-03-03 18:45:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.15370611183355) internal successors, (24252), 7690 states have internal predecessors, (24252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 24252 transitions. [2022-03-03 18:45:14,424 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 24252 transitions. Word has length 23 [2022-03-03 18:45:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:14,425 INFO L470 AbstractCegarLoop]: Abstraction has 7691 states and 24252 transitions. [2022-03-03 18:45:14,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-03-03 18:45:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 24252 transitions. [2022-03-03 18:45:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:14,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:14,436 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:14,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-03 18:45:14,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:14,637 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1936537135, now seen corresponding path program 284 times [2022-03-03 18:45:14,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:14,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071158127] [2022-03-03 18:45:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:14,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:14,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071158127] [2022-03-03 18:45:14,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071158127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:14,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56012095] [2022-03-03 18:45:14,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:45:14,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:14,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:14,817 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:14,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-03 18:45:14,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:45:14,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:15,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:15,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56012095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:15,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:15,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 31 [2022-03-03 18:45:15,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051584900] [2022-03-03 18:45:15,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:15,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:45:15,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:45:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:45:15,496 INFO L87 Difference]: Start difference. First operand 7691 states and 24252 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2022-03-03 18:45:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:16,091 INFO L93 Difference]: Finished difference Result 8086 states and 25005 transitions. [2022-03-03 18:45:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:45:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 23 [2022-03-03 18:45:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:16,109 INFO L225 Difference]: With dead ends: 8086 [2022-03-03 18:45:16,110 INFO L226 Difference]: Without dead ends: 8068 [2022-03-03 18:45:16,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:45:16,110 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 163 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:16,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 891 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2022-03-03 18:45:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7641. [2022-03-03 18:45:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7641 states, 7640 states have (on average 3.148167539267016) internal successors, (24052), 7640 states have internal predecessors, (24052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 24052 transitions. [2022-03-03 18:45:16,271 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 24052 transitions. Word has length 23 [2022-03-03 18:45:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:16,271 INFO L470 AbstractCegarLoop]: Abstraction has 7641 states and 24052 transitions. [2022-03-03 18:45:16,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2022-03-03 18:45:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 24052 transitions. [2022-03-03 18:45:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:16,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:16,284 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:16,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-03-03 18:45:16,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:16,485 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:16,485 INFO L85 PathProgramCache]: Analyzing trace with hash -142756693, now seen corresponding path program 285 times [2022-03-03 18:45:16,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:16,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528594622] [2022-03-03 18:45:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:16,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:16,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:16,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528594622] [2022-03-03 18:45:16,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528594622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:16,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576768383] [2022-03-03 18:45:16,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:45:16,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:16,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:16,642 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:16,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-03 18:45:16,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:45:16,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:16,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:17,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576768383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:17,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:17,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 29 [2022-03-03 18:45:17,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301245298] [2022-03-03 18:45:17,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:17,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:17,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:17,291 INFO L87 Difference]: Start difference. First operand 7641 states and 24052 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:17,889 INFO L93 Difference]: Finished difference Result 7976 states and 24675 transitions. [2022-03-03 18:45:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:45:17,890 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-03-03 18:45:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:17,907 INFO L225 Difference]: With dead ends: 7976 [2022-03-03 18:45:17,907 INFO L226 Difference]: Without dead ends: 7954 [2022-03-03 18:45:17,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:17,908 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 146 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:17,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 775 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2022-03-03 18:45:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7625. [2022-03-03 18:45:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2022-03-03 18:45:18,087 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2022-03-03 18:45:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:18,087 INFO L470 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2022-03-03 18:45:18,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2022-03-03 18:45:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:18,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:18,104 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:18,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-03 18:45:18,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:18,314 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash -176355921, now seen corresponding path program 286 times [2022-03-03 18:45:18,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:18,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236936342] [2022-03-03 18:45:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:18,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:18,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236936342] [2022-03-03 18:45:18,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236936342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:18,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798223948] [2022-03-03 18:45:18,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:45:18,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:18,504 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:18,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-03 18:45:18,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:45:18,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:18,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:18,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:19,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798223948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:19,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:19,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-03-03 18:45:19,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897360467] [2022-03-03 18:45:19,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:19,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:45:19,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:45:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:45:19,126 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2022-03-03 18:45:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:19,675 INFO L93 Difference]: Finished difference Result 7875 states and 24443 transitions. [2022-03-03 18:45:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:45:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 23 [2022-03-03 18:45:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:19,692 INFO L225 Difference]: With dead ends: 7875 [2022-03-03 18:45:19,692 INFO L226 Difference]: Without dead ends: 7868 [2022-03-03 18:45:19,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:19,693 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 158 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:19,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 681 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-03-03 18:45:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7625. [2022-03-03 18:45:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2022-03-03 18:45:19,846 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2022-03-03 18:45:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:19,847 INFO L470 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2022-03-03 18:45:19,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2022-03-03 18:45:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2022-03-03 18:45:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:19,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:19,860 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:19,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-03-03 18:45:20,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-03 18:45:20,060 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:20,061 INFO L85 PathProgramCache]: Analyzing trace with hash 851276801, now seen corresponding path program 287 times [2022-03-03 18:45:20,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:20,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043635862] [2022-03-03 18:45:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:20,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:20,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043635862] [2022-03-03 18:45:20,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043635862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:20,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646489688] [2022-03-03 18:45:20,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:45:20,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:20,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:20,229 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:20,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-03 18:45:20,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:45:20,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:20,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:45:20,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:20,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646489688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:20,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:20,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-03-03 18:45:20,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314521237] [2022-03-03 18:45:20,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:20,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:20,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:20,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:20,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:20,911 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:21,327 INFO L93 Difference]: Finished difference Result 7842 states and 24373 transitions. [2022-03-03 18:45:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:45:21,327 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-03-03 18:45:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:21,344 INFO L225 Difference]: With dead ends: 7842 [2022-03-03 18:45:21,344 INFO L226 Difference]: Without dead ends: 7829 [2022-03-03 18:45:21,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:21,344 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:21,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 557 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:45:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2022-03-03 18:45:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7608. [2022-03-03 18:45:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7607 states have (on average 3.1456553174707507) internal successors, (23929), 7607 states have internal predecessors, (23929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 23929 transitions. [2022-03-03 18:45:21,529 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 23929 transitions. Word has length 23 [2022-03-03 18:45:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:21,529 INFO L470 AbstractCegarLoop]: Abstraction has 7608 states and 23929 transitions. [2022-03-03 18:45:21,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 23929 transitions. [2022-03-03 18:45:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:21,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:21,543 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:21,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-03-03 18:45:21,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-03 18:45:21,743 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 605256295, now seen corresponding path program 288 times [2022-03-03 18:45:21,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:21,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662978063] [2022-03-03 18:45:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:21,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:21,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662978063] [2022-03-03 18:45:21,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662978063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:21,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272910042] [2022-03-03 18:45:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:45:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:21,924 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:21,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-03 18:45:21,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:45:21,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:22,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:22,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272910042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:22,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:22,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 30 [2022-03-03 18:45:22,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623230915] [2022-03-03 18:45:22,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:22,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:45:22,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:45:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:45:22,568 INFO L87 Difference]: Start difference. First operand 7608 states and 23929 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:45:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:23,126 INFO L93 Difference]: Finished difference Result 8242 states and 25517 transitions. [2022-03-03 18:45:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:45:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 23 [2022-03-03 18:45:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:23,144 INFO L225 Difference]: With dead ends: 8242 [2022-03-03 18:45:23,144 INFO L226 Difference]: Without dead ends: 8225 [2022-03-03 18:45:23,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:23,145 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 143 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:23,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 859 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2022-03-03 18:45:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 7836. [2022-03-03 18:45:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.1537970644543716) internal successors, (24710), 7835 states have internal predecessors, (24710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 24710 transitions. [2022-03-03 18:45:23,296 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 24710 transitions. Word has length 23 [2022-03-03 18:45:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:23,296 INFO L470 AbstractCegarLoop]: Abstraction has 7836 states and 24710 transitions. [2022-03-03 18:45:23,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:45:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 24710 transitions. [2022-03-03 18:45:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:23,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:23,309 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:23,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-03 18:45:23,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-03 18:45:23,510 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:23,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2075008277, now seen corresponding path program 289 times [2022-03-03 18:45:23,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:23,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122440493] [2022-03-03 18:45:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:23,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:23,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:23,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122440493] [2022-03-03 18:45:23,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122440493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:23,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470912322] [2022-03-03 18:45:23,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:45:23,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:23,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:23,688 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:23,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-03 18:45:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:23,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:24,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470912322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:24,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:24,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 31 [2022-03-03 18:45:24,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106914679] [2022-03-03 18:45:24,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:24,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:45:24,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:45:24,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:45:24,355 INFO L87 Difference]: Start difference. First operand 7836 states and 24710 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2022-03-03 18:45:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:24,967 INFO L93 Difference]: Finished difference Result 8244 states and 25471 transitions. [2022-03-03 18:45:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:45:24,967 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 23 [2022-03-03 18:45:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:24,984 INFO L225 Difference]: With dead ends: 8244 [2022-03-03 18:45:24,984 INFO L226 Difference]: Without dead ends: 8226 [2022-03-03 18:45:24,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:45:24,984 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 168 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:24,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 976 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2022-03-03 18:45:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 7776. [2022-03-03 18:45:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 3.1481672025723473) internal successors, (24477), 7775 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 24477 transitions. [2022-03-03 18:45:25,125 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 24477 transitions. Word has length 23 [2022-03-03 18:45:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:25,125 INFO L470 AbstractCegarLoop]: Abstraction has 7776 states and 24477 transitions. [2022-03-03 18:45:25,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2022-03-03 18:45:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 24477 transitions. [2022-03-03 18:45:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:25,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:25,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:25,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-03-03 18:45:25,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-03-03 18:45:25,337 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash 140665191, now seen corresponding path program 290 times [2022-03-03 18:45:25,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:25,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419976477] [2022-03-03 18:45:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:25,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:25,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:25,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419976477] [2022-03-03 18:45:25,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419976477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:25,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580082574] [2022-03-03 18:45:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:45:25,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:25,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:25,491 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:25,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-03 18:45:25,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:45:25,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:26,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580082574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:26,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:26,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 29 [2022-03-03 18:45:26,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299189863] [2022-03-03 18:45:26,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:26,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:26,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:26,106 INFO L87 Difference]: Start difference. First operand 7776 states and 24477 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2022-03-03 18:45:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:26,724 INFO L93 Difference]: Finished difference Result 8185 states and 25224 transitions. [2022-03-03 18:45:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:45:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 23 [2022-03-03 18:45:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:26,737 INFO L225 Difference]: With dead ends: 8185 [2022-03-03 18:45:26,737 INFO L226 Difference]: Without dead ends: 8163 [2022-03-03 18:45:26,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:26,738 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 174 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:26,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 926 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2022-03-03 18:45:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 7750. [2022-03-03 18:45:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 3.145438121047877) internal successors, (24374), 7749 states have internal predecessors, (24374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 24374 transitions. [2022-03-03 18:45:26,903 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 24374 transitions. Word has length 23 [2022-03-03 18:45:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:26,903 INFO L470 AbstractCegarLoop]: Abstraction has 7750 states and 24374 transitions. [2022-03-03 18:45:26,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2022-03-03 18:45:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 24374 transitions. [2022-03-03 18:45:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:26,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:26,915 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:26,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-03 18:45:27,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:27,116 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 107065963, now seen corresponding path program 291 times [2022-03-03 18:45:27,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:27,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239592306] [2022-03-03 18:45:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:27,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:27,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:27,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239592306] [2022-03-03 18:45:27,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239592306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:27,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028188372] [2022-03-03 18:45:27,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:45:27,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:27,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:27,308 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:27,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-03 18:45:27,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:45:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:27,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:27,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028188372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:27,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:27,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 28 [2022-03-03 18:45:27,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160025711] [2022-03-03 18:45:27,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:27,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:45:27,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:45:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:45:27,899 INFO L87 Difference]: Start difference. First operand 7750 states and 24374 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:28,484 INFO L93 Difference]: Finished difference Result 8091 states and 24993 transitions. [2022-03-03 18:45:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:45:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:28,500 INFO L225 Difference]: With dead ends: 8091 [2022-03-03 18:45:28,500 INFO L226 Difference]: Without dead ends: 8065 [2022-03-03 18:45:28,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:28,501 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 157 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:28,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 717 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-03-03 18:45:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7731. [2022-03-03 18:45:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2022-03-03 18:45:28,635 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2022-03-03 18:45:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:28,635 INFO L470 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2022-03-03 18:45:28,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2022-03-03 18:45:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:28,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:28,647 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:28,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-03-03 18:45:28,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-03 18:45:28,848 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash -934510105, now seen corresponding path program 292 times [2022-03-03 18:45:28,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:28,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872576540] [2022-03-03 18:45:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:29,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:29,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872576540] [2022-03-03 18:45:29,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872576540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:29,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989771543] [2022-03-03 18:45:29,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:45:29,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:29,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:29,013 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:29,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-03 18:45:29,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:45:29,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:29,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:29,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:29,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989771543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:29,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:29,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 27 [2022-03-03 18:45:29,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730049252] [2022-03-03 18:45:29,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:29,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 18:45:29,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 18:45:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:45:29,599 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:30,157 INFO L93 Difference]: Finished difference Result 7972 states and 24730 transitions. [2022-03-03 18:45:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:45:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:30,170 INFO L225 Difference]: With dead ends: 7972 [2022-03-03 18:45:30,170 INFO L226 Difference]: Without dead ends: 7965 [2022-03-03 18:45:30,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:30,170 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 172 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:30,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 631 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2022-03-03 18:45:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7731. [2022-03-03 18:45:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2022-03-03 18:45:30,288 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2022-03-03 18:45:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:30,288 INFO L470 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2022-03-03 18:45:30,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2022-03-03 18:45:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:30,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:30,300 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:30,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-03-03 18:45:30,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-03 18:45:30,500 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2020496965, now seen corresponding path program 293 times [2022-03-03 18:45:30,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:30,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973538568] [2022-03-03 18:45:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:30,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:30,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973538568] [2022-03-03 18:45:30,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973538568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:30,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900935443] [2022-03-03 18:45:30,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:45:30,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:30,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:30,653 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:30,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-03 18:45:30,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:45:30,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:30,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:45:30,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:31,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900935443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:31,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:31,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-03-03 18:45:31,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91877905] [2022-03-03 18:45:31,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:31,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:31,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:31,299 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:31,665 INFO L93 Difference]: Finished difference Result 7915 states and 24623 transitions. [2022-03-03 18:45:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:45:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-03-03 18:45:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:31,680 INFO L225 Difference]: With dead ends: 7915 [2022-03-03 18:45:31,681 INFO L226 Difference]: Without dead ends: 7902 [2022-03-03 18:45:31,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:31,681 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 134 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:31,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 503 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:45:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2022-03-03 18:45:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7707. [2022-03-03 18:45:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.1418375291980274) internal successors, (24211), 7706 states have internal predecessors, (24211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 24211 transitions. [2022-03-03 18:45:31,815 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 24211 transitions. Word has length 23 [2022-03-03 18:45:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:31,815 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 24211 transitions. [2022-03-03 18:45:31,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 24211 transitions. [2022-03-03 18:45:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:31,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:31,826 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:31,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-03 18:45:32,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:32,027 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 801400107, now seen corresponding path program 294 times [2022-03-03 18:45:32,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:32,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814504266] [2022-03-03 18:45:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:32,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:32,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814504266] [2022-03-03 18:45:32,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814504266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:32,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431362798] [2022-03-03 18:45:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:45:32,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:32,220 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:32,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-03 18:45:32,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:45:32,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:32,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:32,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:32,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431362798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:32,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:32,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 30 [2022-03-03 18:45:32,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599125672] [2022-03-03 18:45:32,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:32,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:45:32,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:45:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:45:32,826 INFO L87 Difference]: Start difference. First operand 7707 states and 24211 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:33,421 INFO L93 Difference]: Finished difference Result 8283 states and 25598 transitions. [2022-03-03 18:45:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:45:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:33,436 INFO L225 Difference]: With dead ends: 8283 [2022-03-03 18:45:33,437 INFO L226 Difference]: Without dead ends: 8266 [2022-03-03 18:45:33,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:33,437 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 155 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:33,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 978 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2022-03-03 18:45:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 7931. [2022-03-03 18:45:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.1479192938209333) internal successors, (24963), 7930 states have internal predecessors, (24963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 24963 transitions. [2022-03-03 18:45:33,576 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 24963 transitions. Word has length 23 [2022-03-03 18:45:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:33,576 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 24963 transitions. [2022-03-03 18:45:33,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 24963 transitions. [2022-03-03 18:45:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:33,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:33,587 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:33,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-03-03 18:45:33,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:33,788 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:33,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1878864465, now seen corresponding path program 295 times [2022-03-03 18:45:33,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:33,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095263568] [2022-03-03 18:45:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:33,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:33,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095263568] [2022-03-03 18:45:33,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095263568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:33,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457477561] [2022-03-03 18:45:33,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:45:33,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:33,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:33,935 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:33,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-03 18:45:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:34,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:34,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457477561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:34,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:34,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2022-03-03 18:45:34,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18850775] [2022-03-03 18:45:34,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:34,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:45:34,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:45:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:45:34,557 INFO L87 Difference]: Start difference. First operand 7931 states and 24963 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:35,116 INFO L93 Difference]: Finished difference Result 8281 states and 25535 transitions. [2022-03-03 18:45:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:45:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:35,170 INFO L225 Difference]: With dead ends: 8281 [2022-03-03 18:45:35,171 INFO L226 Difference]: Without dead ends: 8263 [2022-03-03 18:45:35,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:45:35,171 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 185 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:35,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 966 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2022-03-03 18:45:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7865. [2022-03-03 18:45:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 3.1434384537131232) internal successors, (24720), 7864 states have internal predecessors, (24720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 24720 transitions. [2022-03-03 18:45:35,295 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 24720 transitions. Word has length 23 [2022-03-03 18:45:35,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:35,295 INFO L470 AbstractCegarLoop]: Abstraction has 7865 states and 24720 transitions. [2022-03-03 18:45:35,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 24720 transitions. [2022-03-03 18:45:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:35,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:35,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:35,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-03-03 18:45:35,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:35,508 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash 336809003, now seen corresponding path program 296 times [2022-03-03 18:45:35,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:35,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875782066] [2022-03-03 18:45:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:35,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:35,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:35,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875782066] [2022-03-03 18:45:35,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875782066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:35,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253697176] [2022-03-03 18:45:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:45:35,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:35,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:35,680 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:35,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-03 18:45:35,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:45:35,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:35,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:35,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:36,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253697176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:36,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:36,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 29 [2022-03-03 18:45:36,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796854490] [2022-03-03 18:45:36,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:36,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:36,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:36,296 INFO L87 Difference]: Start difference. First operand 7865 states and 24720 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:36,858 INFO L93 Difference]: Finished difference Result 8238 states and 25326 transitions. [2022-03-03 18:45:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:45:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:36,874 INFO L225 Difference]: With dead ends: 8238 [2022-03-03 18:45:36,874 INFO L226 Difference]: Without dead ends: 8216 [2022-03-03 18:45:36,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:36,874 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 166 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:36,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 822 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2022-03-03 18:45:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 7840. [2022-03-03 18:45:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7839 states have (on average 3.1408342900880215) internal successors, (24621), 7839 states have internal predecessors, (24621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 24621 transitions. [2022-03-03 18:45:37,014 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 24621 transitions. Word has length 23 [2022-03-03 18:45:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:37,015 INFO L470 AbstractCegarLoop]: Abstraction has 7840 states and 24621 transitions. [2022-03-03 18:45:37,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 24621 transitions. [2022-03-03 18:45:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:37,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:37,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:37,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-03-03 18:45:37,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:37,226 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash 303209775, now seen corresponding path program 297 times [2022-03-03 18:45:37,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:37,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908281925] [2022-03-03 18:45:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:37,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:37,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:37,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908281925] [2022-03-03 18:45:37,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908281925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:37,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477279648] [2022-03-03 18:45:37,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:45:37,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:37,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:37,385 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:37,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-03 18:45:37,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:45:37,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:37,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:37,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:37,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:37,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477279648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:37,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:37,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 28 [2022-03-03 18:45:37,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167530005] [2022-03-03 18:45:37,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:37,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:45:37,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:37,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:45:37,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:45:37,992 INFO L87 Difference]: Start difference. First operand 7840 states and 24621 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:38,603 INFO L93 Difference]: Finished difference Result 8244 states and 25274 transitions. [2022-03-03 18:45:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:45:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:38,621 INFO L225 Difference]: With dead ends: 8244 [2022-03-03 18:45:38,622 INFO L226 Difference]: Without dead ends: 8218 [2022-03-03 18:45:38,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:38,622 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 164 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:38,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 810 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:45:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2022-03-03 18:45:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 7816. [2022-03-03 18:45:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7816 states, 7815 states have (on average 3.1396033269353807) internal successors, (24536), 7815 states have internal predecessors, (24536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 24536 transitions. [2022-03-03 18:45:38,782 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 24536 transitions. Word has length 23 [2022-03-03 18:45:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:38,782 INFO L470 AbstractCegarLoop]: Abstraction has 7816 states and 24536 transitions. [2022-03-03 18:45:38,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 24536 transitions. [2022-03-03 18:45:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:38,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:38,796 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:38,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-03-03 18:45:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-03-03 18:45:38,996 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash -738366293, now seen corresponding path program 298 times [2022-03-03 18:45:38,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:38,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288451589] [2022-03-03 18:45:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:38,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:39,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:39,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288451589] [2022-03-03 18:45:39,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288451589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:39,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538559906] [2022-03-03 18:45:39,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:45:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:39,163 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:39,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-03 18:45:39,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:45:39,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:39,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:39,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:39,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538559906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:39,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:39,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2022-03-03 18:45:39,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274699087] [2022-03-03 18:45:39,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:39,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 18:45:39,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 18:45:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:45:39,749 INFO L87 Difference]: Start difference. First operand 7816 states and 24536 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:40,479 INFO L93 Difference]: Finished difference Result 8147 states and 25070 transitions. [2022-03-03 18:45:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:45:40,479 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:40,499 INFO L225 Difference]: With dead ends: 8147 [2022-03-03 18:45:40,499 INFO L226 Difference]: Without dead ends: 8117 [2022-03-03 18:45:40,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:40,500 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 170 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:40,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 859 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2022-03-03 18:45:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7795. [2022-03-03 18:45:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 3.1395945599178856) internal successors, (24470), 7794 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 24470 transitions. [2022-03-03 18:45:40,691 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 24470 transitions. Word has length 23 [2022-03-03 18:45:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:40,691 INFO L470 AbstractCegarLoop]: Abstraction has 7795 states and 24470 transitions. [2022-03-03 18:45:40,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 24470 transitions. [2022-03-03 18:45:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:40,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:40,704 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:40,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-03-03 18:45:40,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-03 18:45:40,904 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:40,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1332513967, now seen corresponding path program 299 times [2022-03-03 18:45:40,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:40,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819370153] [2022-03-03 18:45:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:40,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:41,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:41,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819370153] [2022-03-03 18:45:41,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819370153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:41,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151799282] [2022-03-03 18:45:41,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:45:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:41,078 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:41,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-03 18:45:41,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:45:41,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:41,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:41,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:41,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151799282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:41,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:41,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2022-03-03 18:45:41,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682178396] [2022-03-03 18:45:41,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:41,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:45:41,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:45:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:45:41,630 INFO L87 Difference]: Start difference. First operand 7795 states and 24470 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-03-03 18:45:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:42,283 INFO L93 Difference]: Finished difference Result 8028 states and 24837 transitions. [2022-03-03 18:45:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:45:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 23 [2022-03-03 18:45:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:42,299 INFO L225 Difference]: With dead ends: 8028 [2022-03-03 18:45:42,299 INFO L226 Difference]: Without dead ends: 8021 [2022-03-03 18:45:42,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:42,300 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:42,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 809 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2022-03-03 18:45:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7797. [2022-03-03 18:45:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 7796 states have (on average 3.1391739353514625) internal successors, (24473), 7796 states have internal predecessors, (24473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 24473 transitions. [2022-03-03 18:45:42,434 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 24473 transitions. Word has length 23 [2022-03-03 18:45:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:42,435 INFO L470 AbstractCegarLoop]: Abstraction has 7797 states and 24473 transitions. [2022-03-03 18:45:42,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-03-03 18:45:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 24473 transitions. [2022-03-03 18:45:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:42,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:42,446 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:42,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-03-03 18:45:42,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-03 18:45:42,647 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:42,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash -388383615, now seen corresponding path program 300 times [2022-03-03 18:45:42,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:42,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269664047] [2022-03-03 18:45:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:42,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:42,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:42,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269664047] [2022-03-03 18:45:42,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269664047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:42,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521079240] [2022-03-03 18:45:42,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:45:42,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:42,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:42,798 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:42,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-03 18:45:42,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:45:42,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:42,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:42,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:45:43,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:43,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521079240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:43,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:43,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-03-03 18:45:43,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804584665] [2022-03-03 18:45:43,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:43,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:43,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:43,485 INFO L87 Difference]: Start difference. First operand 7797 states and 24473 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:43,827 INFO L93 Difference]: Finished difference Result 7916 states and 24667 transitions. [2022-03-03 18:45:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:45:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-03-03 18:45:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:43,842 INFO L225 Difference]: With dead ends: 7916 [2022-03-03 18:45:43,842 INFO L226 Difference]: Without dead ends: 7903 [2022-03-03 18:45:43,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:43,842 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 135 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:43,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 472 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:45:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2022-03-03 18:45:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7773. [2022-03-03 18:45:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 3.139475038600103) internal successors, (24400), 7772 states have internal predecessors, (24400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 24400 transitions. [2022-03-03 18:45:43,966 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 24400 transitions. Word has length 23 [2022-03-03 18:45:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:43,966 INFO L470 AbstractCegarLoop]: Abstraction has 7773 states and 24400 transitions. [2022-03-03 18:45:43,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-03-03 18:45:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 24400 transitions. [2022-03-03 18:45:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:43,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:43,977 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:43,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-03 18:45:44,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:44,177 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1708076313, now seen corresponding path program 301 times [2022-03-03 18:45:44,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:44,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263972369] [2022-03-03 18:45:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:44,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:44,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263972369] [2022-03-03 18:45:44,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263972369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:44,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498204221] [2022-03-03 18:45:44,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:45:44,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:44,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:44,318 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:44,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-03 18:45:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:44,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:44,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:44,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498204221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:44,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:44,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-03 18:45:44,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575342745] [2022-03-03 18:45:44,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:44,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:45:44,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:45:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:45:44,913 INFO L87 Difference]: Start difference. First operand 7773 states and 24400 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:45,491 INFO L93 Difference]: Finished difference Result 8383 states and 25880 transitions. [2022-03-03 18:45:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:45:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:45,507 INFO L225 Difference]: With dead ends: 8383 [2022-03-03 18:45:45,507 INFO L226 Difference]: Without dead ends: 8366 [2022-03-03 18:45:45,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:45,508 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 186 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:45,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 988 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8366 states. [2022-03-03 18:45:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8366 to 8073. [2022-03-03 18:45:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.1385034687809714) internal successors, (25334), 8072 states have internal predecessors, (25334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 25334 transitions. [2022-03-03 18:45:45,660 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 25334 transitions. Word has length 23 [2022-03-03 18:45:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:45,660 INFO L470 AbstractCegarLoop]: Abstraction has 8073 states and 25334 transitions. [2022-03-03 18:45:45,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 25334 transitions. [2022-03-03 18:45:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:45,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:45,671 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:45,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-03 18:45:45,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-03-03 18:45:45,872 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:45,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash -93373589, now seen corresponding path program 302 times [2022-03-03 18:45:45,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:45,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495603741] [2022-03-03 18:45:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:46,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:46,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495603741] [2022-03-03 18:45:46,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495603741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:46,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320591783] [2022-03-03 18:45:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:45:46,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:46,022 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:46,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-03 18:45:46,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:45:46,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:46,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:46,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:46,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320591783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:46,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:46,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-03 18:45:46,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978777119] [2022-03-03 18:45:46,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:46,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:45:46,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:45:46,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:45:46,647 INFO L87 Difference]: Start difference. First operand 8073 states and 25334 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:45:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:47,398 INFO L93 Difference]: Finished difference Result 8381 states and 25825 transitions. [2022-03-03 18:45:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:45:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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 23 [2022-03-03 18:45:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:47,418 INFO L225 Difference]: With dead ends: 8381 [2022-03-03 18:45:47,418 INFO L226 Difference]: Without dead ends: 8365 [2022-03-03 18:45:47,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:45:47,419 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 123 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:47,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1366 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:45:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2022-03-03 18:45:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 8044. [2022-03-03 18:45:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.134526917816735) internal successors, (25211), 8043 states have internal predecessors, (25211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25211 transitions. [2022-03-03 18:45:47,587 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25211 transitions. Word has length 23 [2022-03-03 18:45:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:47,587 INFO L470 AbstractCegarLoop]: Abstraction has 8044 states and 25211 transitions. [2022-03-03 18:45:47,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:45:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25211 transitions. [2022-03-03 18:45:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:47,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:47,601 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:47,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-03-03 18:45:47,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-03-03 18:45:47,802 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2122299879, now seen corresponding path program 303 times [2022-03-03 18:45:47,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:47,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810477157] [2022-03-03 18:45:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:47,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:47,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810477157] [2022-03-03 18:45:47,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810477157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:47,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816478259] [2022-03-03 18:45:47,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:45:47,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:47,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:47,965 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:47,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-03 18:45:48,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:45:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:48,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:48,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:48,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816478259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:48,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:48,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-03 18:45:48,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616968172] [2022-03-03 18:45:48,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:45:48,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:45:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:45:48,647 INFO L87 Difference]: Start difference. First operand 8044 states and 25211 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:49,308 INFO L93 Difference]: Finished difference Result 8378 states and 25745 transitions. [2022-03-03 18:45:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:45:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:49,326 INFO L225 Difference]: With dead ends: 8378 [2022-03-03 18:45:49,327 INFO L226 Difference]: Without dead ends: 8360 [2022-03-03 18:45:49,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:49,327 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 173 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:49,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1003 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2022-03-03 18:45:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8008. [2022-03-03 18:45:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 3.129511677282378) internal successors, (25058), 8007 states have internal predecessors, (25058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 25058 transitions. [2022-03-03 18:45:49,490 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 25058 transitions. Word has length 23 [2022-03-03 18:45:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:49,490 INFO L470 AbstractCegarLoop]: Abstraction has 8008 states and 25058 transitions. [2022-03-03 18:45:49,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:49,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 25058 transitions. [2022-03-03 18:45:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:49,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:49,504 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:49,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-03-03 18:45:49,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-03 18:45:49,704 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2088700651, now seen corresponding path program 304 times [2022-03-03 18:45:49,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:49,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459231971] [2022-03-03 18:45:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:49,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:49,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:49,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459231971] [2022-03-03 18:45:49,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459231971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:49,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680602475] [2022-03-03 18:45:49,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:45:49,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:49,868 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:49,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-03 18:45:49,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:45:49,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:49,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:49,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:50,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:50,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680602475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:50,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:50,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-03-03 18:45:50,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129264704] [2022-03-03 18:45:50,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:50,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:45:50,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:45:50,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:45:50,462 INFO L87 Difference]: Start difference. First operand 8008 states and 25058 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-03-03 18:45:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:51,197 INFO L93 Difference]: Finished difference Result 8369 states and 25633 transitions. [2022-03-03 18:45:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:45:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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 23 [2022-03-03 18:45:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:51,216 INFO L225 Difference]: With dead ends: 8369 [2022-03-03 18:45:51,216 INFO L226 Difference]: Without dead ends: 8349 [2022-03-03 18:45:51,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:51,217 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 123 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:51,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1040 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:45:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2022-03-03 18:45:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 7964. [2022-03-03 18:45:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 3.126585457742057) internal successors, (24897), 7963 states have internal predecessors, (24897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 24897 transitions. [2022-03-03 18:45:51,416 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 24897 transitions. Word has length 23 [2022-03-03 18:45:51,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:51,416 INFO L470 AbstractCegarLoop]: Abstraction has 7964 states and 24897 transitions. [2022-03-03 18:45:51,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-03-03 18:45:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 24897 transitions. [2022-03-03 18:45:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:51,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:51,429 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:51,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-03-03 18:45:51,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2022-03-03 18:45:51,630 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1047124583, now seen corresponding path program 305 times [2022-03-03 18:45:51,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:51,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912711021] [2022-03-03 18:45:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:51,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:51,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912711021] [2022-03-03 18:45:51,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912711021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:51,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734790036] [2022-03-03 18:45:51,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:45:51,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:51,799 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:51,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-03 18:45:51,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:45:51,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:52,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:52,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734790036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:52,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:52,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-03-03 18:45:52,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623122424] [2022-03-03 18:45:52,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:52,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 18:45:52,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 18:45:52,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:45:52,381 INFO L87 Difference]: Start difference. First operand 7964 states and 24897 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-03-03 18:45:53,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:53,148 INFO L93 Difference]: Finished difference Result 8358 states and 25520 transitions. [2022-03-03 18:45:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:45:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 23 [2022-03-03 18:45:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:53,166 INFO L225 Difference]: With dead ends: 8358 [2022-03-03 18:45:53,166 INFO L226 Difference]: Without dead ends: 8336 [2022-03-03 18:45:53,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:53,166 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 165 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:53,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 976 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:45:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2022-03-03 18:45:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7922. [2022-03-03 18:45:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7922 states, 7921 states have (on average 3.1249842191642467) internal successors, (24753), 7921 states have internal predecessors, (24753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 24753 transitions. [2022-03-03 18:45:53,335 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 24753 transitions. Word has length 23 [2022-03-03 18:45:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:53,335 INFO L470 AbstractCegarLoop]: Abstraction has 7922 states and 24753 transitions. [2022-03-03 18:45:53,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-03-03 18:45:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 24753 transitions. [2022-03-03 18:45:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:53,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:53,348 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:53,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-03-03 18:45:53,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:53,549 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:53,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1176962453, now seen corresponding path program 306 times [2022-03-03 18:45:53,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:53,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486875944] [2022-03-03 18:45:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:53,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:53,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:53,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486875944] [2022-03-03 18:45:53,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486875944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:53,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219258727] [2022-03-03 18:45:53,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:45:53,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:53,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:53,737 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:53,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-03 18:45:53,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:45:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:53,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:54,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219258727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:54,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:54,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-03-03 18:45:54,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726918385] [2022-03-03 18:45:54,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:54,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:45:54,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:45:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:45:54,336 INFO L87 Difference]: Start difference. First operand 7922 states and 24753 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:55,107 INFO L93 Difference]: Finished difference Result 8208 states and 25204 transitions. [2022-03-03 18:45:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:45:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:45:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:55,125 INFO L225 Difference]: With dead ends: 8208 [2022-03-03 18:45:55,125 INFO L226 Difference]: Without dead ends: 8184 [2022-03-03 18:45:55,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:45:55,126 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 126 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:55,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 890 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:45:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2022-03-03 18:45:55,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7881. [2022-03-03 18:45:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 3.1266497461928933) internal successors, (24638), 7880 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 24638 transitions. [2022-03-03 18:45:55,284 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 24638 transitions. Word has length 23 [2022-03-03 18:45:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:55,284 INFO L470 AbstractCegarLoop]: Abstraction has 7881 states and 24638 transitions. [2022-03-03 18:45:55,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 24638 transitions. [2022-03-03 18:45:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:55,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:55,298 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:55,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-03-03 18:45:55,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:55,498 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1404183833, now seen corresponding path program 307 times [2022-03-03 18:45:55,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:55,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679850199] [2022-03-03 18:45:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:55,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:55,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:55,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679850199] [2022-03-03 18:45:55,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679850199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:55,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354078799] [2022-03-03 18:45:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:45:55,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:55,680 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:55,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-03 18:45:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:55,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:56,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354078799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:56,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:56,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-03-03 18:45:56,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510246934] [2022-03-03 18:45:56,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:56,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:45:56,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:45:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:45:56,225 INFO L87 Difference]: Start difference. First operand 7881 states and 24638 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-03-03 18:45:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:56,937 INFO L93 Difference]: Finished difference Result 8087 states and 24955 transitions. [2022-03-03 18:45:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:45:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 23 [2022-03-03 18:45:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:56,956 INFO L225 Difference]: With dead ends: 8087 [2022-03-03 18:45:56,956 INFO L226 Difference]: Without dead ends: 8080 [2022-03-03 18:45:56,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:45:56,956 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 120 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:56,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 821 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:45:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2022-03-03 18:45:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7893. [2022-03-03 18:45:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7892 states have (on average 3.124176381145464) internal successors, (24656), 7892 states have internal predecessors, (24656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 24656 transitions. [2022-03-03 18:45:57,149 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 24656 transitions. Word has length 23 [2022-03-03 18:45:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:57,149 INFO L470 AbstractCegarLoop]: Abstraction has 7893 states and 24656 transitions. [2022-03-03 18:45:57,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-03-03 18:45:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 24656 transitions. [2022-03-03 18:45:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:57,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:57,162 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:57,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-03-03 18:45:57,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-03 18:45:57,363 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1674274927, now seen corresponding path program 308 times [2022-03-03 18:45:57,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:57,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190568972] [2022-03-03 18:45:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:57,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:57,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190568972] [2022-03-03 18:45:57,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190568972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:57,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281769182] [2022-03-03 18:45:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:45:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:57,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:57,513 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:57,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-03 18:45:57,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:45:57,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:58,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281769182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:58,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:58,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 30 [2022-03-03 18:45:58,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49827471] [2022-03-03 18:45:58,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:58,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:45:58,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:45:58,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:45:58,169 INFO L87 Difference]: Start difference. First operand 7893 states and 24656 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-03-03 18:45:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:45:58,581 INFO L93 Difference]: Finished difference Result 8261 states and 25496 transitions. [2022-03-03 18:45:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:45:58,582 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 23 [2022-03-03 18:45:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:45:58,600 INFO L225 Difference]: With dead ends: 8261 [2022-03-03 18:45:58,600 INFO L226 Difference]: Without dead ends: 8251 [2022-03-03 18:45:58,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:45:58,600 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 187 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:45:58,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 607 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:45:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2022-03-03 18:45:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 7953. [2022-03-03 18:45:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7952 states have (on average 3.1281438631790746) internal successors, (24875), 7952 states have internal predecessors, (24875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:45:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 24875 transitions. [2022-03-03 18:45:58,769 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 24875 transitions. Word has length 23 [2022-03-03 18:45:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:45:58,769 INFO L470 AbstractCegarLoop]: Abstraction has 7953 states and 24875 transitions. [2022-03-03 18:45:58,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-03-03 18:45:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 24875 transitions. [2022-03-03 18:45:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:45:58,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:45:58,783 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:45:58,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-03 18:45:58,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-03 18:45:58,983 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:45:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:45:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1005989645, now seen corresponding path program 309 times [2022-03-03 18:45:58,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:45:58,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915409564] [2022-03-03 18:45:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:45:58,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:45:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:45:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:59,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:45:59,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915409564] [2022-03-03 18:45:59,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915409564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:45:59,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469026449] [2022-03-03 18:45:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:45:59,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:45:59,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:45:59,140 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:45:59,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-03 18:45:59,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:45:59,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:45:59,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:45:59,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:45:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:59,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:45:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:45:59,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469026449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:45:59,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:45:59,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 31 [2022-03-03 18:45:59,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963569158] [2022-03-03 18:45:59,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:45:59,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:45:59,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:45:59,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:45:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:45:59,816 INFO L87 Difference]: Start difference. First operand 7953 states and 24875 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2022-03-03 18:46:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:00,268 INFO L93 Difference]: Finished difference Result 8243 states and 25454 transitions. [2022-03-03 18:46:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:46:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 23 [2022-03-03 18:46:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:00,287 INFO L225 Difference]: With dead ends: 8243 [2022-03-03 18:46:00,287 INFO L226 Difference]: Without dead ends: 8236 [2022-03-03 18:46:00,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:00,287 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 121 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:00,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 669 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2022-03-03 18:46:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 7951. [2022-03-03 18:46:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.127924528301887) internal successors, (24867), 7950 states have internal predecessors, (24867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 24867 transitions. [2022-03-03 18:46:00,447 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 24867 transitions. Word has length 23 [2022-03-03 18:46:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:00,447 INFO L470 AbstractCegarLoop]: Abstraction has 7951 states and 24867 transitions. [2022-03-03 18:46:00,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2022-03-03 18:46:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 24867 transitions. [2022-03-03 18:46:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:00,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:00,460 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:00,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-03-03 18:46:00,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-03 18:46:00,661 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2049237563, now seen corresponding path program 310 times [2022-03-03 18:46:00,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:00,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458144602] [2022-03-03 18:46:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:00,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:00,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:00,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458144602] [2022-03-03 18:46:00,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458144602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:00,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465129954] [2022-03-03 18:46:00,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:46:00,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:00,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:00,816 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:00,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-03 18:46:00,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:46:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:00,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:01,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:01,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465129954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:01,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:01,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-03-03 18:46:01,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138443151] [2022-03-03 18:46:01,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:01,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:46:01,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:46:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:46:01,460 INFO L87 Difference]: Start difference. First operand 7951 states and 24867 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2022-03-03 18:46:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:01,868 INFO L93 Difference]: Finished difference Result 8146 states and 25212 transitions. [2022-03-03 18:46:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:46:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 23 [2022-03-03 18:46:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:01,887 INFO L225 Difference]: With dead ends: 8146 [2022-03-03 18:46:01,887 INFO L226 Difference]: Without dead ends: 8139 [2022-03-03 18:46:01,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:46:01,888 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 113 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:01,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 634 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2022-03-03 18:46:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7950. [2022-03-03 18:46:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7949 states have (on average 3.127940621461819) internal successors, (24864), 7949 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 24864 transitions. [2022-03-03 18:46:02,020 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 24864 transitions. Word has length 23 [2022-03-03 18:46:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:02,020 INFO L470 AbstractCegarLoop]: Abstraction has 7950 states and 24864 transitions. [2022-03-03 18:46:02,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2022-03-03 18:46:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 24864 transitions. [2022-03-03 18:46:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:02,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:02,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:02,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-03-03 18:46:02,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-03 18:46:02,232 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -847019033, now seen corresponding path program 311 times [2022-03-03 18:46:02,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:02,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086601682] [2022-03-03 18:46:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:02,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:02,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086601682] [2022-03-03 18:46:02,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086601682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:02,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658129463] [2022-03-03 18:46:02,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:46:02,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:02,436 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:02,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-03 18:46:02,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:46:02,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:02,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:03,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658129463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:03,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:03,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 30 [2022-03-03 18:46:03,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87363726] [2022-03-03 18:46:03,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:03,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:46:03,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:46:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:46:03,080 INFO L87 Difference]: Start difference. First operand 7950 states and 24864 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:46:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:03,520 INFO L93 Difference]: Finished difference Result 8403 states and 25974 transitions. [2022-03-03 18:46:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:46:03,520 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 23 [2022-03-03 18:46:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:03,536 INFO L225 Difference]: With dead ends: 8403 [2022-03-03 18:46:03,536 INFO L226 Difference]: Without dead ends: 8393 [2022-03-03 18:46:03,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:03,537 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 142 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:03,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 707 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-03-03 18:46:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8044. [2022-03-03 18:46:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.133034937212483) internal successors, (25199), 8043 states have internal predecessors, (25199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25199 transitions. [2022-03-03 18:46:03,673 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25199 transitions. Word has length 23 [2022-03-03 18:46:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:03,673 INFO L470 AbstractCegarLoop]: Abstraction has 8044 states and 25199 transitions. [2022-03-03 18:46:03,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:46:03,673 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25199 transitions. [2022-03-03 18:46:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:03,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:03,685 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:03,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-03-03 18:46:03,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-03 18:46:03,886 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash 767683691, now seen corresponding path program 312 times [2022-03-03 18:46:03,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:03,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439660663] [2022-03-03 18:46:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:04,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:04,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439660663] [2022-03-03 18:46:04,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439660663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:04,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998126890] [2022-03-03 18:46:04,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:46:04,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:04,032 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:04,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-03 18:46:04,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 18:46:04,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:04,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:04,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998126890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:04,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:04,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 30 [2022-03-03 18:46:04,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897929219] [2022-03-03 18:46:04,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:04,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:46:04,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:04,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:46:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:46:04,662 INFO L87 Difference]: Start difference. First operand 8044 states and 25199 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-03-03 18:46:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:05,062 INFO L93 Difference]: Finished difference Result 8384 states and 25924 transitions. [2022-03-03 18:46:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:46:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 23 [2022-03-03 18:46:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:05,078 INFO L225 Difference]: With dead ends: 8384 [2022-03-03 18:46:05,078 INFO L226 Difference]: Without dead ends: 8377 [2022-03-03 18:46:05,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:05,078 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 200 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:05,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 610 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2022-03-03 18:46:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 8041. [2022-03-03 18:46:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 3.1327114427860696) internal successors, (25187), 8040 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 25187 transitions. [2022-03-03 18:46:05,234 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 25187 transitions. Word has length 23 [2022-03-03 18:46:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:05,234 INFO L470 AbstractCegarLoop]: Abstraction has 8041 states and 25187 transitions. [2022-03-03 18:46:05,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-03-03 18:46:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 25187 transitions. [2022-03-03 18:46:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:05,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:05,245 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:05,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-03-03 18:46:05,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-03-03 18:46:05,447 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash -275564227, now seen corresponding path program 313 times [2022-03-03 18:46:05,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:05,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812335848] [2022-03-03 18:46:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:05,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:05,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812335848] [2022-03-03 18:46:05,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812335848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963081046] [2022-03-03 18:46:05,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:46:05,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:05,601 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:05,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-03 18:46:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:05,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:05,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:05,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:06,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963081046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:06,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:06,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 29 [2022-03-03 18:46:06,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688106849] [2022-03-03 18:46:06,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:06,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:46:06,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:46:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:46:06,248 INFO L87 Difference]: Start difference. First operand 8041 states and 25187 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:06,679 INFO L93 Difference]: Finished difference Result 8323 states and 25762 transitions. [2022-03-03 18:46:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:46:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:06,695 INFO L225 Difference]: With dead ends: 8323 [2022-03-03 18:46:06,695 INFO L226 Difference]: Without dead ends: 8310 [2022-03-03 18:46:06,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:06,696 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 178 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:06,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 594 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8310 states. [2022-03-03 18:46:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 8045. [2022-03-03 18:46:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.131775236200895) internal successors, (25192), 8044 states have internal predecessors, (25192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 25192 transitions. [2022-03-03 18:46:06,827 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 25192 transitions. Word has length 23 [2022-03-03 18:46:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:06,827 INFO L470 AbstractCegarLoop]: Abstraction has 8045 states and 25192 transitions. [2022-03-03 18:46:06,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 25192 transitions. [2022-03-03 18:46:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:06,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:06,839 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:06,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-03-03 18:46:07,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:07,040 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 259665575, now seen corresponding path program 314 times [2022-03-03 18:46:07,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:07,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282293073] [2022-03-03 18:46:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:07,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:07,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282293073] [2022-03-03 18:46:07,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282293073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:07,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185656197] [2022-03-03 18:46:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:46:07,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:07,204 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:07,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-03 18:46:07,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:46:07,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:07,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185656197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:07,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:07,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-03-03 18:46:07,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491076455] [2022-03-03 18:46:07,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:07,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:46:07,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:46:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:46:07,839 INFO L87 Difference]: Start difference. First operand 8045 states and 25192 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:08,274 INFO L93 Difference]: Finished difference Result 8231 states and 25513 transitions. [2022-03-03 18:46:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:46:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:08,289 INFO L225 Difference]: With dead ends: 8231 [2022-03-03 18:46:08,290 INFO L226 Difference]: Without dead ends: 8224 [2022-03-03 18:46:08,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:46:08,290 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 146 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:08,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 580 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2022-03-03 18:46:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 8043. [2022-03-03 18:46:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8043 states, 8042 states have (on average 3.1318080079582193) internal successors, (25186), 8042 states have internal predecessors, (25186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 25186 transitions. [2022-03-03 18:46:08,418 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 25186 transitions. Word has length 23 [2022-03-03 18:46:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:08,418 INFO L470 AbstractCegarLoop]: Abstraction has 8043 states and 25186 transitions. [2022-03-03 18:46:08,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 25186 transitions. [2022-03-03 18:46:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:08,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:08,430 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:08,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-03-03 18:46:08,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:08,630 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:08,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1476834137, now seen corresponding path program 315 times [2022-03-03 18:46:08,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:08,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112065067] [2022-03-03 18:46:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:08,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:08,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:08,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112065067] [2022-03-03 18:46:08,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112065067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:08,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597326384] [2022-03-03 18:46:08,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:46:08,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:08,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:08,786 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:08,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-03 18:46:08,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:46:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:09,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:09,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597326384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:09,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:09,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-03-03 18:46:09,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776234669] [2022-03-03 18:46:09,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:09,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:46:09,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:09,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:46:09,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:46:09,441 INFO L87 Difference]: Start difference. First operand 8043 states and 25186 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:09,838 INFO L93 Difference]: Finished difference Result 8179 states and 25417 transitions. [2022-03-03 18:46:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:46:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:09,857 INFO L225 Difference]: With dead ends: 8179 [2022-03-03 18:46:09,857 INFO L226 Difference]: Without dead ends: 8163 [2022-03-03 18:46:09,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:46:09,858 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:09,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 453 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2022-03-03 18:46:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8022. [2022-03-03 18:46:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 3.132153098117442) internal successors, (25123), 8021 states have internal predecessors, (25123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 25123 transitions. [2022-03-03 18:46:10,074 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 25123 transitions. Word has length 23 [2022-03-03 18:46:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:10,074 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 25123 transitions. [2022-03-03 18:46:10,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 25123 transitions. [2022-03-03 18:46:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:10,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:10,088 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:10,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-03-03 18:46:10,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:10,289 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1697720465, now seen corresponding path program 316 times [2022-03-03 18:46:10,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:10,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117097118] [2022-03-03 18:46:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:10,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:10,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:10,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117097118] [2022-03-03 18:46:10,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117097118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:10,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279004269] [2022-03-03 18:46:10,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:46:10,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:10,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:10,432 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:10,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-03 18:46:10,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:46:10,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:10,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:10,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:10,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:11,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279004269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:11,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:11,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 30 [2022-03-03 18:46:11,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103604651] [2022-03-03 18:46:11,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:11,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:46:11,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:46:11,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:46:11,057 INFO L87 Difference]: Start difference. First operand 8022 states and 25123 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:11,428 INFO L93 Difference]: Finished difference Result 8489 states and 26222 transitions. [2022-03-03 18:46:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:46:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:11,444 INFO L225 Difference]: With dead ends: 8489 [2022-03-03 18:46:11,445 INFO L226 Difference]: Without dead ends: 8479 [2022-03-03 18:46:11,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:11,445 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 234 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:11,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 536 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2022-03-03 18:46:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8124. [2022-03-03 18:46:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.1368952357503384) internal successors, (25481), 8123 states have internal predecessors, (25481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 25481 transitions. [2022-03-03 18:46:11,577 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 25481 transitions. Word has length 23 [2022-03-03 18:46:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:11,578 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 25481 transitions. [2022-03-03 18:46:11,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 25481 transitions. [2022-03-03 18:46:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:11,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:11,589 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:11,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-03-03 18:46:11,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:11,789 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash -83017741, now seen corresponding path program 317 times [2022-03-03 18:46:11,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:11,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100257974] [2022-03-03 18:46:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:11,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:11,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:11,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100257974] [2022-03-03 18:46:11,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100257974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:11,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020779557] [2022-03-03 18:46:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:46:11,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:11,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:11,962 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:11,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-03 18:46:11,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:46:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:12,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:12,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020779557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:12,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:12,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 30 [2022-03-03 18:46:12,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736859604] [2022-03-03 18:46:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:12,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:46:12,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:46:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:46:12,577 INFO L87 Difference]: Start difference. First operand 8124 states and 25481 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:46:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:13,030 INFO L93 Difference]: Finished difference Result 8470 states and 26170 transitions. [2022-03-03 18:46:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:46:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 23 [2022-03-03 18:46:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:13,044 INFO L225 Difference]: With dead ends: 8470 [2022-03-03 18:46:13,044 INFO L226 Difference]: Without dead ends: 8463 [2022-03-03 18:46:13,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:13,044 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 217 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:13,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 647 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2022-03-03 18:46:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8120. [2022-03-03 18:46:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.1364700086217514) internal successors, (25465), 8119 states have internal predecessors, (25465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25465 transitions. [2022-03-03 18:46:13,172 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25465 transitions. Word has length 23 [2022-03-03 18:46:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:13,172 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 25465 transitions. [2022-03-03 18:46:13,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:46:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25465 transitions. [2022-03-03 18:46:13,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:13,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:13,184 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:13,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-03-03 18:46:13,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:13,385 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1126265659, now seen corresponding path program 318 times [2022-03-03 18:46:13,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:13,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718670559] [2022-03-03 18:46:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:13,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:13,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718670559] [2022-03-03 18:46:13,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718670559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:13,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581876181] [2022-03-03 18:46:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:46:13,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:13,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:13,537 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:13,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-03 18:46:13,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 18:46:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:13,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:13,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:14,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581876181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:14,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:14,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 29 [2022-03-03 18:46:14,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335631495] [2022-03-03 18:46:14,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:14,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:46:14,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:46:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:46:14,198 INFO L87 Difference]: Start difference. First operand 8120 states and 25465 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:14,762 INFO L93 Difference]: Finished difference Result 8466 states and 26134 transitions. [2022-03-03 18:46:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:46:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:14,777 INFO L225 Difference]: With dead ends: 8466 [2022-03-03 18:46:14,777 INFO L226 Difference]: Without dead ends: 8453 [2022-03-03 18:46:14,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:14,777 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 147 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:14,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 806 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2022-03-03 18:46:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 8117. [2022-03-03 18:46:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.13590438639724) internal successors, (25451), 8116 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25451 transitions. [2022-03-03 18:46:14,913 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25451 transitions. Word has length 23 [2022-03-03 18:46:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:14,913 INFO L470 AbstractCegarLoop]: Abstraction has 8117 states and 25451 transitions. [2022-03-03 18:46:14,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25451 transitions. [2022-03-03 18:46:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:14,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:14,924 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:14,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-03 18:46:15,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-03-03 18:46:15,125 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:15,125 INFO L85 PathProgramCache]: Analyzing trace with hash -591035857, now seen corresponding path program 319 times [2022-03-03 18:46:15,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:15,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049182049] [2022-03-03 18:46:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:15,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:15,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:15,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049182049] [2022-03-03 18:46:15,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049182049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:15,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996007206] [2022-03-03 18:46:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:46:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:15,310 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:15,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-03 18:46:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:15,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:15,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996007206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:15,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:15,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 28 [2022-03-03 18:46:15,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255323649] [2022-03-03 18:46:15,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:15,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:46:15,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:46:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:46:15,926 INFO L87 Difference]: Start difference. First operand 8117 states and 25451 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:16,424 INFO L93 Difference]: Finished difference Result 8405 states and 25973 transitions. [2022-03-03 18:46:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:46:16,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:16,440 INFO L225 Difference]: With dead ends: 8405 [2022-03-03 18:46:16,440 INFO L226 Difference]: Without dead ends: 8389 [2022-03-03 18:46:16,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:16,440 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 155 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:16,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 634 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2022-03-03 18:46:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8120. [2022-03-03 18:46:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.134745658332307) internal successors, (25451), 8119 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25451 transitions. [2022-03-03 18:46:16,574 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25451 transitions. Word has length 23 [2022-03-03 18:46:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:16,574 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 25451 transitions. [2022-03-03 18:46:16,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25451 transitions. [2022-03-03 18:46:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:16,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:16,586 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:16,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-03-03 18:46:16,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:16,786 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1178781179, now seen corresponding path program 320 times [2022-03-03 18:46:16,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:16,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296085483] [2022-03-03 18:46:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:16,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:16,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:16,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296085483] [2022-03-03 18:46:16,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296085483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:16,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174188471] [2022-03-03 18:46:16,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:46:16,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:16,951 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:16,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-03 18:46:16,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:46:16,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:17,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:17,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174188471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:17,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:17,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 27 [2022-03-03 18:46:17,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951427976] [2022-03-03 18:46:17,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:17,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 18:46:17,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 18:46:17,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:46:17,548 INFO L87 Difference]: Start difference. First operand 8120 states and 25451 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-03-03 18:46:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:18,033 INFO L93 Difference]: Finished difference Result 8334 states and 25817 transitions. [2022-03-03 18:46:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:46:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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 23 [2022-03-03 18:46:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:18,048 INFO L225 Difference]: With dead ends: 8334 [2022-03-03 18:46:18,048 INFO L226 Difference]: Without dead ends: 8327 [2022-03-03 18:46:18,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:46:18,049 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 145 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:18,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 590 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2022-03-03 18:46:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8117. [2022-03-03 18:46:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.1347954657466732) internal successors, (25442), 8116 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25442 transitions. [2022-03-03 18:46:18,208 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25442 transitions. Word has length 23 [2022-03-03 18:46:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:18,208 INFO L470 AbstractCegarLoop]: Abstraction has 8117 states and 25442 transitions. [2022-03-03 18:46:18,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-03-03 18:46:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25442 transitions. [2022-03-03 18:46:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:18,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:18,220 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:18,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-03-03 18:46:18,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-03-03 18:46:18,420 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash 526249639, now seen corresponding path program 321 times [2022-03-03 18:46:18,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:18,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463873808] [2022-03-03 18:46:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:18,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:18,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:18,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463873808] [2022-03-03 18:46:18,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463873808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:18,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74668907] [2022-03-03 18:46:18,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:46:18,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:18,573 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:18,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-03 18:46:18,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:46:18,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:18,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:18,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:19,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74668907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:19,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:19,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-03-03 18:46:19,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772068051] [2022-03-03 18:46:19,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:19,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:46:19,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:46:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:46:19,195 INFO L87 Difference]: Start difference. First operand 8117 states and 25442 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:19,613 INFO L93 Difference]: Finished difference Result 8376 states and 25895 transitions. [2022-03-03 18:46:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:46:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:19,628 INFO L225 Difference]: With dead ends: 8376 [2022-03-03 18:46:19,628 INFO L226 Difference]: Without dead ends: 8360 [2022-03-03 18:46:19,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:46:19,628 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:19,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 505 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2022-03-03 18:46:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8101. [2022-03-03 18:46:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8101 states, 8100 states have (on average 3.1339506172839506) internal successors, (25385), 8100 states have internal predecessors, (25385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 25385 transitions. [2022-03-03 18:46:19,760 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 25385 transitions. Word has length 23 [2022-03-03 18:46:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:19,760 INFO L470 AbstractCegarLoop]: Abstraction has 8101 states and 25385 transitions. [2022-03-03 18:46:19,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 25385 transitions. [2022-03-03 18:46:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:19,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:19,772 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:19,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-03-03 18:46:19,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-03-03 18:46:19,973 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash 824302597, now seen corresponding path program 322 times [2022-03-03 18:46:19,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:19,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969806119] [2022-03-03 18:46:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:19,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:20,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:20,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969806119] [2022-03-03 18:46:20,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969806119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:20,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964490983] [2022-03-03 18:46:20,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:46:20,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:20,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:20,132 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:20,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-03 18:46:20,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:46:20,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:20,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:20,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:20,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:20,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964490983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:20,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:20,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 27 [2022-03-03 18:46:20,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955738915] [2022-03-03 18:46:20,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:20,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 18:46:20,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 18:46:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:46:20,759 INFO L87 Difference]: Start difference. First operand 8101 states and 25385 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-03-03 18:46:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:21,161 INFO L93 Difference]: Finished difference Result 8270 states and 25679 transitions. [2022-03-03 18:46:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:46:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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 23 [2022-03-03 18:46:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:21,176 INFO L225 Difference]: With dead ends: 8270 [2022-03-03 18:46:21,176 INFO L226 Difference]: Without dead ends: 8251 [2022-03-03 18:46:21,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:46:21,176 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:21,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 433 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2022-03-03 18:46:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8085. [2022-03-03 18:46:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 8084 states have (on average 3.13421573478476) internal successors, (25337), 8084 states have internal predecessors, (25337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 25337 transitions. [2022-03-03 18:46:21,301 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 25337 transitions. Word has length 23 [2022-03-03 18:46:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:21,301 INFO L470 AbstractCegarLoop]: Abstraction has 8085 states and 25337 transitions. [2022-03-03 18:46:21,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-03-03 18:46:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 25337 transitions. [2022-03-03 18:46:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:21,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:21,312 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:21,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-03-03 18:46:21,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:21,512 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:21,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1995306215, now seen corresponding path program 323 times [2022-03-03 18:46:21,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:21,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791606755] [2022-03-03 18:46:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:21,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:21,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791606755] [2022-03-03 18:46:21,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791606755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:21,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115098082] [2022-03-03 18:46:21,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:46:21,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:21,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:21,655 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:21,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-03 18:46:21,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:46:21,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:21,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:21,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:21,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:22,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115098082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:22,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:22,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 30 [2022-03-03 18:46:22,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973595862] [2022-03-03 18:46:22,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:22,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:46:22,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:22,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:46:22,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:46:22,251 INFO L87 Difference]: Start difference. First operand 8085 states and 25337 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:22,766 INFO L93 Difference]: Finished difference Result 8595 states and 26485 transitions. [2022-03-03 18:46:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:46:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:22,783 INFO L225 Difference]: With dead ends: 8595 [2022-03-03 18:46:22,783 INFO L226 Difference]: Without dead ends: 8585 [2022-03-03 18:46:22,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:22,783 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 184 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:22,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 811 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2022-03-03 18:46:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8181. [2022-03-03 18:46:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8180 states have (on average 3.1383863080684598) internal successors, (25672), 8180 states have internal predecessors, (25672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 25672 transitions. [2022-03-03 18:46:22,953 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 25672 transitions. Word has length 23 [2022-03-03 18:46:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:22,953 INFO L470 AbstractCegarLoop]: Abstraction has 8181 states and 25672 transitions. [2022-03-03 18:46:22,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 25672 transitions. [2022-03-03 18:46:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:22,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:22,964 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:22,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-03-03 18:46:23,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:23,165 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash -684958357, now seen corresponding path program 324 times [2022-03-03 18:46:23,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:23,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362769318] [2022-03-03 18:46:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:23,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:23,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362769318] [2022-03-03 18:46:23,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362769318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:23,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693254951] [2022-03-03 18:46:23,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:46:23,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:23,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:23,309 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:23,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-03 18:46:23,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:46:23,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:23,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:23,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:23,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693254951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:23,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:23,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 30 [2022-03-03 18:46:23,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562354458] [2022-03-03 18:46:23,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:23,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:46:23,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:46:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:46:23,912 INFO L87 Difference]: Start difference. First operand 8181 states and 25672 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:24,347 INFO L93 Difference]: Finished difference Result 8579 states and 26445 transitions. [2022-03-03 18:46:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:46:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:24,363 INFO L225 Difference]: With dead ends: 8579 [2022-03-03 18:46:24,363 INFO L226 Difference]: Without dead ends: 8572 [2022-03-03 18:46:24,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:24,363 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 220 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:24,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 651 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2022-03-03 18:46:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8170. [2022-03-03 18:46:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 3.138082996694822) internal successors, (25635), 8169 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 25635 transitions. [2022-03-03 18:46:24,502 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 25635 transitions. Word has length 23 [2022-03-03 18:46:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:24,502 INFO L470 AbstractCegarLoop]: Abstraction has 8170 states and 25635 transitions. [2022-03-03 18:46:24,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 25635 transitions. [2022-03-03 18:46:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:24,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:24,514 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:24,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-03-03 18:46:24,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-03-03 18:46:24,714 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1728206275, now seen corresponding path program 325 times [2022-03-03 18:46:24,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:24,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391378703] [2022-03-03 18:46:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:24,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:24,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391378703] [2022-03-03 18:46:24,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391378703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:24,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409583230] [2022-03-03 18:46:24,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:46:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:24,868 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:24,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-03 18:46:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:25,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:25,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409583230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:25,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:25,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 29 [2022-03-03 18:46:25,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220920845] [2022-03-03 18:46:25,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:25,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:46:25,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:46:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:46:25,504 INFO L87 Difference]: Start difference. First operand 8170 states and 25635 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:26,026 INFO L93 Difference]: Finished difference Result 8583 states and 26428 transitions. [2022-03-03 18:46:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:46:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:26,042 INFO L225 Difference]: With dead ends: 8583 [2022-03-03 18:46:26,042 INFO L226 Difference]: Without dead ends: 8570 [2022-03-03 18:46:26,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:26,042 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 188 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:26,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 771 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2022-03-03 18:46:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8166. [2022-03-03 18:46:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 3.1375382731169625) internal successors, (25618), 8165 states have internal predecessors, (25618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 25618 transitions. [2022-03-03 18:46:26,180 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 25618 transitions. Word has length 23 [2022-03-03 18:46:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:26,180 INFO L470 AbstractCegarLoop]: Abstraction has 8166 states and 25618 transitions. [2022-03-03 18:46:26,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 25618 transitions. [2022-03-03 18:46:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:26,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:26,193 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:26,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-03-03 18:46:26,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-03-03 18:46:26,393 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1192976473, now seen corresponding path program 326 times [2022-03-03 18:46:26,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:26,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008783212] [2022-03-03 18:46:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:26,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:26,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008783212] [2022-03-03 18:46:26,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008783212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:26,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579409031] [2022-03-03 18:46:26,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:46:26,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:26,546 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:26,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-03 18:46:26,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:46:26,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:26,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:26,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:27,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579409031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:27,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:27,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 28 [2022-03-03 18:46:27,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652084894] [2022-03-03 18:46:27,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:27,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 18:46:27,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 18:46:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:46:27,148 INFO L87 Difference]: Start difference. First operand 8166 states and 25618 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-03-03 18:46:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:27,664 INFO L93 Difference]: Finished difference Result 8591 states and 26411 transitions. [2022-03-03 18:46:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:46:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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 23 [2022-03-03 18:46:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:27,683 INFO L225 Difference]: With dead ends: 8591 [2022-03-03 18:46:27,684 INFO L226 Difference]: Without dead ends: 8575 [2022-03-03 18:46:27,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:27,684 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 225 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:27,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 608 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2022-03-03 18:46:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8162. [2022-03-03 18:46:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 3.1371155495650043) internal successors, (25602), 8161 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 25602 transitions. [2022-03-03 18:46:27,903 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 25602 transitions. Word has length 23 [2022-03-03 18:46:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:27,903 INFO L470 AbstractCegarLoop]: Abstraction has 8162 states and 25602 transitions. [2022-03-03 18:46:27,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-03-03 18:46:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 25602 transitions. [2022-03-03 18:46:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:27,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:27,915 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:27,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-03-03 18:46:28,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:28,115 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1780721795, now seen corresponding path program 327 times [2022-03-03 18:46:28,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:28,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798863606] [2022-03-03 18:46:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:28,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:28,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:28,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798863606] [2022-03-03 18:46:28,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798863606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:28,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455213575] [2022-03-03 18:46:28,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:46:28,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:28,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:28,276 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:28,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-03 18:46:28,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:46:28,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:28,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:28,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:28,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455213575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:28,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:28,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2022-03-03 18:46:28,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003971876] [2022-03-03 18:46:28,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:28,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 18:46:28,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 18:46:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:46:28,865 INFO L87 Difference]: Start difference. First operand 8162 states and 25602 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-03-03 18:46:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:29,428 INFO L93 Difference]: Finished difference Result 8522 states and 26260 transitions. [2022-03-03 18:46:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:46:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 23 [2022-03-03 18:46:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:29,447 INFO L225 Difference]: With dead ends: 8522 [2022-03-03 18:46:29,448 INFO L226 Difference]: Without dead ends: 8503 [2022-03-03 18:46:29,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:46:29,448 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 190 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:29,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 612 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2022-03-03 18:46:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 8158. [2022-03-03 18:46:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 3.136815005516734) internal successors, (25587), 8157 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 25587 transitions. [2022-03-03 18:46:29,618 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 25587 transitions. Word has length 23 [2022-03-03 18:46:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:29,618 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 25587 transitions. [2022-03-03 18:46:29,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-03-03 18:46:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 25587 transitions. [2022-03-03 18:46:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 18:46:29,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:29,633 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:29,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-03-03 18:46:29,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:29,833 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1474009703, now seen corresponding path program 328 times [2022-03-03 18:46:29,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:29,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262632953] [2022-03-03 18:46:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:29,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:30,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:30,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262632953] [2022-03-03 18:46:30,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262632953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:30,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945680644] [2022-03-03 18:46:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:46:30,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:30,037 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:30,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-03 18:46:30,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:46:30,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:30,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-03 18:46:30,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:30,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:30,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945680644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:30,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:30,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2022-03-03 18:46:30,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255821935] [2022-03-03 18:46:30,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:30,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:46:30,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:46:30,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:46:30,626 INFO L87 Difference]: Start difference. First operand 8158 states and 25587 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:31,208 INFO L93 Difference]: Finished difference Result 8435 states and 26072 transitions. [2022-03-03 18:46:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:46:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 18:46:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:31,228 INFO L225 Difference]: With dead ends: 8435 [2022-03-03 18:46:31,228 INFO L226 Difference]: Without dead ends: 8428 [2022-03-03 18:46:31,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:46:31,228 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 175 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:31,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 597 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:46:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2022-03-03 18:46:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8154. [2022-03-03 18:46:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 3.1368821292775664) internal successors, (25575), 8153 states have internal predecessors, (25575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 25575 transitions. [2022-03-03 18:46:31,394 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 25575 transitions. Word has length 23 [2022-03-03 18:46:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:31,394 INFO L470 AbstractCegarLoop]: Abstraction has 8154 states and 25575 transitions. [2022-03-03 18:46:31,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 25575 transitions. [2022-03-03 18:46:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:31,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:31,408 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:31,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-03-03 18:46:31,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:31,608 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1371483671, now seen corresponding path program 329 times [2022-03-03 18:46:31,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:31,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070323804] [2022-03-03 18:46:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:31,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:31,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070323804] [2022-03-03 18:46:31,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070323804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:31,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43404475] [2022-03-03 18:46:31,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:46:31,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:31,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:31,682 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:31,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-03 18:46:31,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:46:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:31,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:31,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43404475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:31,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:31,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-03-03 18:46:31,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973740860] [2022-03-03 18:46:31,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:31,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:46:31,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:31,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:46:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:46:31,851 INFO L87 Difference]: Start difference. First operand 8154 states and 25575 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:32,043 INFO L93 Difference]: Finished difference Result 11007 states and 33833 transitions. [2022-03-03 18:46:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 18:46:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:32,062 INFO L225 Difference]: With dead ends: 11007 [2022-03-03 18:46:32,062 INFO L226 Difference]: Without dead ends: 10984 [2022-03-03 18:46:32,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:46:32,063 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:32,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 91 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:46:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2022-03-03 18:46:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8149. [2022-03-03 18:46:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 3.1375797741777123) internal successors, (25565), 8148 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 25565 transitions. [2022-03-03 18:46:32,226 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 25565 transitions. Word has length 24 [2022-03-03 18:46:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:32,226 INFO L470 AbstractCegarLoop]: Abstraction has 8149 states and 25565 transitions. [2022-03-03 18:46:32,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 25565 transitions. [2022-03-03 18:46:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:32,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:32,238 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:32,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-03-03 18:46:32,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-03-03 18:46:32,438 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1727557625, now seen corresponding path program 330 times [2022-03-03 18:46:32,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:32,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626669849] [2022-03-03 18:46:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:32,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:32,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:32,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626669849] [2022-03-03 18:46:32,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626669849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:32,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104196535] [2022-03-03 18:46:32,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:46:32,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:32,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:32,513 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:32,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-03 18:46:32,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:46:32,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:32,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:32,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:32,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104196535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:32,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:32,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-03-03 18:46:32,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25780265] [2022-03-03 18:46:32,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:32,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:46:32,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:46:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:46:32,671 INFO L87 Difference]: Start difference. First operand 8149 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:32,861 INFO L93 Difference]: Finished difference Result 11150 states and 34266 transitions. [2022-03-03 18:46:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:46:32,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:32,885 INFO L225 Difference]: With dead ends: 11150 [2022-03-03 18:46:32,885 INFO L226 Difference]: Without dead ends: 11150 [2022-03-03 18:46:32,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:46:32,885 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:32,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 118 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:46:32,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11150 states. [2022-03-03 18:46:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11150 to 8243. [2022-03-03 18:46:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8243 states, 8242 states have (on average 3.1360106770201406) internal successors, (25847), 8242 states have internal predecessors, (25847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 25847 transitions. [2022-03-03 18:46:33,081 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 25847 transitions. Word has length 24 [2022-03-03 18:46:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:33,081 INFO L470 AbstractCegarLoop]: Abstraction has 8243 states and 25847 transitions. [2022-03-03 18:46:33,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 25847 transitions. [2022-03-03 18:46:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:33,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:33,093 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:33,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-03-03 18:46:33,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-03-03 18:46:33,293 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash -513773813, now seen corresponding path program 331 times [2022-03-03 18:46:33,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:33,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850833091] [2022-03-03 18:46:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:33,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:33,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:33,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850833091] [2022-03-03 18:46:33,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850833091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:33,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803752350] [2022-03-03 18:46:33,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:46:33,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:33,368 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:33,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-03 18:46:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:33,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803752350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:33,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:33,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:33,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786339692] [2022-03-03 18:46:33,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:33,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:33,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:33,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:33,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:33,551 INFO L87 Difference]: Start difference. First operand 8243 states and 25847 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:34,331 INFO L93 Difference]: Finished difference Result 12726 states and 38747 transitions. [2022-03-03 18:46:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 18:46:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:34,355 INFO L225 Difference]: With dead ends: 12726 [2022-03-03 18:46:34,356 INFO L226 Difference]: Without dead ends: 12716 [2022-03-03 18:46:34,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:46:34,356 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 293 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:34,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 213 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2022-03-03 18:46:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 9550. [2022-03-03 18:46:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9549 states have (on average 3.163472614933501) internal successors, (30208), 9549 states have internal predecessors, (30208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 30208 transitions. [2022-03-03 18:46:34,580 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 30208 transitions. Word has length 24 [2022-03-03 18:46:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:34,580 INFO L470 AbstractCegarLoop]: Abstraction has 9550 states and 30208 transitions. [2022-03-03 18:46:34,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 30208 transitions. [2022-03-03 18:46:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:34,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:34,597 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:34,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-03-03 18:46:34,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-03-03 18:46:34,798 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash 57680993, now seen corresponding path program 332 times [2022-03-03 18:46:34,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:34,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233867978] [2022-03-03 18:46:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:34,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:34,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:34,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233867978] [2022-03-03 18:46:34,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233867978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:34,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925129267] [2022-03-03 18:46:34,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:46:34,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:34,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:34,873 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:34,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-03 18:46:34,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:46:34,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:35,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:35,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925129267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:35,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:35,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:35,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300060167] [2022-03-03 18:46:35,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:35,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:35,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:35,076 INFO L87 Difference]: Start difference. First operand 9550 states and 30208 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:35,941 INFO L93 Difference]: Finished difference Result 12601 states and 38222 transitions. [2022-03-03 18:46:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 18:46:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:35,975 INFO L225 Difference]: With dead ends: 12601 [2022-03-03 18:46:35,975 INFO L226 Difference]: Without dead ends: 12595 [2022-03-03 18:46:35,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 18:46:35,976 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:35,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 237 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2022-03-03 18:46:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9022. [2022-03-03 18:46:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 3.1354617004766654) internal successors, (28285), 9021 states have internal predecessors, (28285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 28285 transitions. [2022-03-03 18:46:36,216 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 28285 transitions. Word has length 24 [2022-03-03 18:46:36,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:36,216 INFO L470 AbstractCegarLoop]: Abstraction has 9022 states and 28285 transitions. [2022-03-03 18:46:36,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:36,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 28285 transitions. [2022-03-03 18:46:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:36,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:36,232 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:36,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-03-03 18:46:36,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-03 18:46:36,433 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:36,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1873890553, now seen corresponding path program 333 times [2022-03-03 18:46:36,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:36,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938877093] [2022-03-03 18:46:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:36,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:36,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:36,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938877093] [2022-03-03 18:46:36,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938877093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:36,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486000385] [2022-03-03 18:46:36,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:46:36,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:36,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:36,507 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:36,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-03 18:46:36,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:46:36,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:36,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:36,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:36,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486000385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:36,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:36,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:36,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334647776] [2022-03-03 18:46:36,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:36,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:36,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:36,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:36,692 INFO L87 Difference]: Start difference. First operand 9022 states and 28285 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:37,666 INFO L93 Difference]: Finished difference Result 11076 states and 33757 transitions. [2022-03-03 18:46:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 18:46:37,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:37,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:37,694 INFO L225 Difference]: With dead ends: 11076 [2022-03-03 18:46:37,694 INFO L226 Difference]: Without dead ends: 11076 [2022-03-03 18:46:37,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 18:46:37,695 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 220 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:37,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 282 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2022-03-03 18:46:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9541. [2022-03-03 18:46:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.1517819706498953) internal successors, (30068), 9540 states have internal predecessors, (30068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 30068 transitions. [2022-03-03 18:46:37,958 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 30068 transitions. Word has length 24 [2022-03-03 18:46:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:37,958 INFO L470 AbstractCegarLoop]: Abstraction has 9541 states and 30068 transitions. [2022-03-03 18:46:37,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 30068 transitions. [2022-03-03 18:46:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:37,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:37,974 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:37,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-03-03 18:46:38,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:38,175 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1956485639, now seen corresponding path program 334 times [2022-03-03 18:46:38,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:38,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178943606] [2022-03-03 18:46:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:38,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:38,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178943606] [2022-03-03 18:46:38,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178943606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:38,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481910837] [2022-03-03 18:46:38,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:46:38,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:38,250 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:38,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-03 18:46:38,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:46:38,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:38,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:38,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481910837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:38,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:38,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:38,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505537870] [2022-03-03 18:46:38,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:38,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:38,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:38,430 INFO L87 Difference]: Start difference. First operand 9541 states and 30068 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:39,375 INFO L93 Difference]: Finished difference Result 10620 states and 32666 transitions. [2022-03-03 18:46:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 18:46:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:39,401 INFO L225 Difference]: With dead ends: 10620 [2022-03-03 18:46:39,401 INFO L226 Difference]: Without dead ends: 10616 [2022-03-03 18:46:39,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 18:46:39,402 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 170 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:39,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 226 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2022-03-03 18:46:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8587. [2022-03-03 18:46:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 8586 states have (on average 3.1179827626368506) internal successors, (26771), 8586 states have internal predecessors, (26771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 26771 transitions. [2022-03-03 18:46:39,598 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 26771 transitions. Word has length 24 [2022-03-03 18:46:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:39,598 INFO L470 AbstractCegarLoop]: Abstraction has 8587 states and 26771 transitions. [2022-03-03 18:46:39,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 26771 transitions. [2022-03-03 18:46:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:39,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:39,612 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:39,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-03-03 18:46:39,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2022-03-03 18:46:39,813 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash 592910795, now seen corresponding path program 335 times [2022-03-03 18:46:39,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:39,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928913520] [2022-03-03 18:46:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:39,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:39,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928913520] [2022-03-03 18:46:39,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928913520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:39,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856929596] [2022-03-03 18:46:39,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:46:39,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:39,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:39,887 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:39,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-03 18:46:39,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:46:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:39,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:40,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:40,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856929596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:40,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:40,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:40,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780562707] [2022-03-03 18:46:40,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:40,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:40,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:40,072 INFO L87 Difference]: Start difference. First operand 8587 states and 26771 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:40,830 INFO L93 Difference]: Finished difference Result 11811 states and 35428 transitions. [2022-03-03 18:46:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 18:46:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:40,860 INFO L225 Difference]: With dead ends: 11811 [2022-03-03 18:46:40,860 INFO L226 Difference]: Without dead ends: 11802 [2022-03-03 18:46:40,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:46:40,861 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 226 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:40,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 198 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2022-03-03 18:46:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 8719. [2022-03-03 18:46:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.118261069052535) internal successors, (27185), 8718 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 27185 transitions. [2022-03-03 18:46:41,096 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 27185 transitions. Word has length 24 [2022-03-03 18:46:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 8719 states and 27185 transitions. [2022-03-03 18:46:41,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 27185 transitions. [2022-03-03 18:46:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:41,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:41,111 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:41,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-03-03 18:46:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-03-03 18:46:41,312 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 5165473, now seen corresponding path program 336 times [2022-03-03 18:46:41,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:41,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075191469] [2022-03-03 18:46:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:41,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:41,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075191469] [2022-03-03 18:46:41,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075191469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:41,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33841228] [2022-03-03 18:46:41,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:46:41,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:41,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:41,385 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:41,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-03 18:46:41,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:46:41,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:41,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:41,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:41,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33841228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:41,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:41,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:41,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482277275] [2022-03-03 18:46:41,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:41,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:41,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:41,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:41,564 INFO L87 Difference]: Start difference. First operand 8719 states and 27185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:42,203 INFO L93 Difference]: Finished difference Result 11970 states and 35970 transitions. [2022-03-03 18:46:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:46:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:42,224 INFO L225 Difference]: With dead ends: 11970 [2022-03-03 18:46:42,224 INFO L226 Difference]: Without dead ends: 11958 [2022-03-03 18:46:42,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:46:42,225 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 323 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:42,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 121 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2022-03-03 18:46:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 8793. [2022-03-03 18:46:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 3.1199954504094634) internal successors, (27431), 8792 states have internal predecessors, (27431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 27431 transitions. [2022-03-03 18:46:42,404 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 27431 transitions. Word has length 24 [2022-03-03 18:46:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:42,404 INFO L470 AbstractCegarLoop]: Abstraction has 8793 states and 27431 transitions. [2022-03-03 18:46:42,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 27431 transitions. [2022-03-03 18:46:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:42,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:42,417 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:42,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-03-03 18:46:42,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-03-03 18:46:42,618 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1035070325, now seen corresponding path program 337 times [2022-03-03 18:46:42,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:42,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202564910] [2022-03-03 18:46:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:42,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:42,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:42,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202564910] [2022-03-03 18:46:42,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202564910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:42,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131722287] [2022-03-03 18:46:42,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:46:42,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:42,688 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:42,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-03 18:46:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:42,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:42,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131722287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:42,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:42,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:42,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809482510] [2022-03-03 18:46:42,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:42,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:42,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:42,863 INFO L87 Difference]: Start difference. First operand 8793 states and 27431 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:43,524 INFO L93 Difference]: Finished difference Result 12336 states and 37268 transitions. [2022-03-03 18:46:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 18:46:43,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:43,558 INFO L225 Difference]: With dead ends: 12336 [2022-03-03 18:46:43,558 INFO L226 Difference]: Without dead ends: 12321 [2022-03-03 18:46:43,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 18:46:43,559 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:43,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 162 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2022-03-03 18:46:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8832. [2022-03-03 18:46:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8831 states have (on average 3.1192390442758464) internal successors, (27546), 8831 states have internal predecessors, (27546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 27546 transitions. [2022-03-03 18:46:43,790 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 27546 transitions. Word has length 24 [2022-03-03 18:46:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:43,790 INFO L470 AbstractCegarLoop]: Abstraction has 8832 states and 27546 transitions. [2022-03-03 18:46:43,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 27546 transitions. [2022-03-03 18:46:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:43,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:43,806 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:43,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-03-03 18:46:44,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:44,006 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:44,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1077358305, now seen corresponding path program 338 times [2022-03-03 18:46:44,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:44,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205735757] [2022-03-03 18:46:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:44,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:44,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205735757] [2022-03-03 18:46:44,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205735757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:44,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158552900] [2022-03-03 18:46:44,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:46:44,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:44,080 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:44,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-03 18:46:44,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:46:44,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:44,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:44,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:44,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158552900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:44,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:44,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:44,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094241370] [2022-03-03 18:46:44,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:44,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:44,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:44,261 INFO L87 Difference]: Start difference. First operand 8832 states and 27546 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:44,829 INFO L93 Difference]: Finished difference Result 12564 states and 38035 transitions. [2022-03-03 18:46:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:46:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:44,863 INFO L225 Difference]: With dead ends: 12564 [2022-03-03 18:46:44,864 INFO L226 Difference]: Without dead ends: 12546 [2022-03-03 18:46:44,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 18:46:44,864 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 200 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:44,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 145 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2022-03-03 18:46:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 8863. [2022-03-03 18:46:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.116339426765967) internal successors, (27617), 8862 states have internal predecessors, (27617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27617 transitions. [2022-03-03 18:46:45,102 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27617 transitions. Word has length 24 [2022-03-03 18:46:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:45,102 INFO L470 AbstractCegarLoop]: Abstraction has 8863 states and 27617 transitions. [2022-03-03 18:46:45,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27617 transitions. [2022-03-03 18:46:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:45,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:45,118 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:45,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-03-03 18:46:45,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:45,318 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2138136395, now seen corresponding path program 339 times [2022-03-03 18:46:45,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:45,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926280673] [2022-03-03 18:46:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:45,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:45,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:45,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926280673] [2022-03-03 18:46:45,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926280673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:45,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194844843] [2022-03-03 18:46:45,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:46:45,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:45,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:45,395 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:45,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-03 18:46:45,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:46:45,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:45,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:45,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:45,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:45,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194844843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:45,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:45,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:46:45,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142977740] [2022-03-03 18:46:45,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:45,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:45,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:45,608 INFO L87 Difference]: Start difference. First operand 8863 states and 27617 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:46,041 INFO L93 Difference]: Finished difference Result 11519 states and 34816 transitions. [2022-03-03 18:46:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:46:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:46,069 INFO L225 Difference]: With dead ends: 11519 [2022-03-03 18:46:46,069 INFO L226 Difference]: Without dead ends: 11501 [2022-03-03 18:46:46,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:46:46,070 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:46,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 204 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:46:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2022-03-03 18:46:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 8863. [2022-03-03 18:46:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.115662378695554) internal successors, (27611), 8862 states have internal predecessors, (27611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27611 transitions. [2022-03-03 18:46:46,290 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27611 transitions. Word has length 24 [2022-03-03 18:46:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:46,290 INFO L470 AbstractCegarLoop]: Abstraction has 8863 states and 27611 transitions. [2022-03-03 18:46:46,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27611 transitions. [2022-03-03 18:46:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:46,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:46,305 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:46,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-03-03 18:46:46,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:46,506 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:46,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash 906198731, now seen corresponding path program 340 times [2022-03-03 18:46:46,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:46,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660455835] [2022-03-03 18:46:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:46,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:46,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660455835] [2022-03-03 18:46:46,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660455835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:46,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237404191] [2022-03-03 18:46:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:46:46,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:46,575 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:46,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-03 18:46:46,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:46:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:46,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:46,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:46,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237404191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:46,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:46,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:46:46,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708396259] [2022-03-03 18:46:46,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:46,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:46,766 INFO L87 Difference]: Start difference. First operand 8863 states and 27611 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:47,669 INFO L93 Difference]: Finished difference Result 10540 states and 31822 transitions. [2022-03-03 18:46:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 18:46:47,669 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:47,694 INFO L225 Difference]: With dead ends: 10540 [2022-03-03 18:46:47,694 INFO L226 Difference]: Without dead ends: 10528 [2022-03-03 18:46:47,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 18:46:47,695 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 262 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:47,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 219 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2022-03-03 18:46:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 9379. [2022-03-03 18:46:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.1330774152271275) internal successors, (29382), 9378 states have internal predecessors, (29382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 29382 transitions. [2022-03-03 18:46:47,966 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 29382 transitions. Word has length 24 [2022-03-03 18:46:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:47,966 INFO L470 AbstractCegarLoop]: Abstraction has 9379 states and 29382 transitions. [2022-03-03 18:46:47,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 29382 transitions. [2022-03-03 18:46:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:47,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:47,982 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:47,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-03-03 18:46:48,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-03-03 18:46:48,183 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 441607627, now seen corresponding path program 341 times [2022-03-03 18:46:48,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:48,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168956177] [2022-03-03 18:46:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:48,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:48,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:48,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168956177] [2022-03-03 18:46:48,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168956177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:48,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199420928] [2022-03-03 18:46:48,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:46:48,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:48,251 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:48,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-03 18:46:48,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:46:48,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:48,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:48,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199420928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:48,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:48,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:46:48,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382769954] [2022-03-03 18:46:48,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:48,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:48,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:48,434 INFO L87 Difference]: Start difference. First operand 9379 states and 29382 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:49,423 INFO L93 Difference]: Finished difference Result 10146 states and 30795 transitions. [2022-03-03 18:46:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 18:46:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:49,448 INFO L225 Difference]: With dead ends: 10146 [2022-03-03 18:46:49,448 INFO L226 Difference]: Without dead ends: 10136 [2022-03-03 18:46:49,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 18:46:49,449 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 221 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:49,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 218 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2022-03-03 18:46:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8546. [2022-03-03 18:46:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 8545 states have (on average 3.1049736688121707) internal successors, (26532), 8545 states have internal predecessors, (26532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 26532 transitions. [2022-03-03 18:46:49,645 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 26532 transitions. Word has length 24 [2022-03-03 18:46:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:49,645 INFO L470 AbstractCegarLoop]: Abstraction has 8546 states and 26532 transitions. [2022-03-03 18:46:49,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 26532 transitions. [2022-03-03 18:46:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:49,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:49,660 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:49,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-03-03 18:46:49,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:49,860 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 408008399, now seen corresponding path program 342 times [2022-03-03 18:46:49,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:49,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184888955] [2022-03-03 18:46:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:49,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:49,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184888955] [2022-03-03 18:46:49,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184888955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:49,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319257353] [2022-03-03 18:46:49,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:46:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:49,937 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-03 18:46:49,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 18:46:49,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:49,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:49,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:50,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:50,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319257353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:50,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:50,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-03-03 18:46:50,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838579362] [2022-03-03 18:46:50,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:50,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:46:50,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:50,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:46:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:46:50,128 INFO L87 Difference]: Start difference. First operand 8546 states and 26532 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:51,032 INFO L93 Difference]: Finished difference Result 9224 states and 27859 transitions. [2022-03-03 18:46:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 18:46:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:51,053 INFO L225 Difference]: With dead ends: 9224 [2022-03-03 18:46:51,053 INFO L226 Difference]: Without dead ends: 9216 [2022-03-03 18:46:51,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 18:46:51,054 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 195 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:51,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 168 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2022-03-03 18:46:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8570. [2022-03-03 18:46:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8570 states, 8569 states have (on average 3.104212860310421) internal successors, (26600), 8569 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8570 states to 8570 states and 26600 transitions. [2022-03-03 18:46:51,266 INFO L78 Accepts]: Start accepts. Automaton has 8570 states and 26600 transitions. Word has length 24 [2022-03-03 18:46:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:51,266 INFO L470 AbstractCegarLoop]: Abstraction has 8570 states and 26600 transitions. [2022-03-03 18:46:51,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 8570 states and 26600 transitions. [2022-03-03 18:46:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:51,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:51,281 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:51,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-03-03 18:46:51,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-03-03 18:46:51,481 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1189620615, now seen corresponding path program 343 times [2022-03-03 18:46:51,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:51,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317979998] [2022-03-03 18:46:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:51,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:51,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:51,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317979998] [2022-03-03 18:46:51,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317979998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:51,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401192215] [2022-03-03 18:46:51,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:46:51,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:51,544 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:51,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-03 18:46:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:51,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:51,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:51,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401192215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:51,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:51,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-03-03 18:46:51,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815627345] [2022-03-03 18:46:51,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:51,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:51,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:51,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:51,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:51,740 INFO L87 Difference]: Start difference. First operand 8570 states and 26600 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:52,617 INFO L93 Difference]: Finished difference Result 10464 states and 31357 transitions. [2022-03-03 18:46:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 18:46:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:52,639 INFO L225 Difference]: With dead ends: 10464 [2022-03-03 18:46:52,639 INFO L226 Difference]: Without dead ends: 10443 [2022-03-03 18:46:52,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 18:46:52,640 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 229 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:52,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 244 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2022-03-03 18:46:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9099. [2022-03-03 18:46:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9099 states, 9098 states have (on average 3.1227742360958453) internal successors, (28411), 9098 states have internal predecessors, (28411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 28411 transitions. [2022-03-03 18:46:52,837 INFO L78 Accepts]: Start accepts. Automaton has 9099 states and 28411 transitions. Word has length 24 [2022-03-03 18:46:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 9099 states and 28411 transitions. [2022-03-03 18:46:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9099 states and 28411 transitions. [2022-03-03 18:46:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:52,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:52,850 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:52,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-03-03 18:46:53,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-03-03 18:46:53,051 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash 725029511, now seen corresponding path program 344 times [2022-03-03 18:46:53,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:53,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323643650] [2022-03-03 18:46:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:53,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:53,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:53,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323643650] [2022-03-03 18:46:53,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323643650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:53,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882820448] [2022-03-03 18:46:53,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:46:53,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:53,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:53,113 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:53,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-03 18:46:53,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:46:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:53,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:53,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:53,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882820448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:53,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:53,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-03-03 18:46:53,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279940287] [2022-03-03 18:46:53,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:53,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:53,297 INFO L87 Difference]: Start difference. First operand 9099 states and 28411 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:54,285 INFO L93 Difference]: Finished difference Result 9961 states and 30084 transitions. [2022-03-03 18:46:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 18:46:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:54,302 INFO L225 Difference]: With dead ends: 9961 [2022-03-03 18:46:54,302 INFO L226 Difference]: Without dead ends: 9953 [2022-03-03 18:46:54,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 18:46:54,303 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 225 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:54,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 243 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2022-03-03 18:46:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8603. [2022-03-03 18:46:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8603 states, 8602 states have (on average 3.106370611485701) internal successors, (26721), 8602 states have internal predecessors, (26721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 26721 transitions. [2022-03-03 18:46:54,456 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 26721 transitions. Word has length 24 [2022-03-03 18:46:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:54,456 INFO L470 AbstractCegarLoop]: Abstraction has 8603 states and 26721 transitions. [2022-03-03 18:46:54,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 26721 transitions. [2022-03-03 18:46:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:54,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:54,469 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:54,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-03-03 18:46:54,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2022-03-03 18:46:54,669 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash 691430283, now seen corresponding path program 345 times [2022-03-03 18:46:54,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:54,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675464593] [2022-03-03 18:46:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:54,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:54,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675464593] [2022-03-03 18:46:54,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675464593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:54,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308971984] [2022-03-03 18:46:54,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:46:54,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:54,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:54,752 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:54,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-03 18:46:54,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 18:46:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:54,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:54,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:54,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308971984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:54,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:54,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 23 [2022-03-03 18:46:54,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754222852] [2022-03-03 18:46:54,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:54,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:46:54,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:54,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:46:54,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:46:54,981 INFO L87 Difference]: Start difference. First operand 8603 states and 26721 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:55,904 INFO L93 Difference]: Finished difference Result 9572 states and 28782 transitions. [2022-03-03 18:46:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 18:46:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:55,922 INFO L225 Difference]: With dead ends: 9572 [2022-03-03 18:46:55,922 INFO L226 Difference]: Without dead ends: 9556 [2022-03-03 18:46:55,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:46:55,923 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 228 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:55,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 240 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2022-03-03 18:46:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8460. [2022-03-03 18:46:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 3.1066319895968793) internal successors, (26279), 8459 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 26279 transitions. [2022-03-03 18:46:56,127 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 26279 transitions. Word has length 24 [2022-03-03 18:46:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:56,127 INFO L470 AbstractCegarLoop]: Abstraction has 8460 states and 26279 transitions. [2022-03-03 18:46:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 26279 transitions. [2022-03-03 18:46:56,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:56,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:56,138 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:56,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-03-03 18:46:56,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:56,338 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash -350145785, now seen corresponding path program 346 times [2022-03-03 18:46:56,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:56,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714221448] [2022-03-03 18:46:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:56,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:56,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:56,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714221448] [2022-03-03 18:46:56,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714221448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:56,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171392060] [2022-03-03 18:46:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:46:56,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:56,410 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:56,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-03-03 18:46:56,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:46:56,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:56,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:56,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171392060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:56,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:56,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2022-03-03 18:46:56,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043566439] [2022-03-03 18:46:56,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:56,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:46:56,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:56,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:46:56,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:46:56,603 INFO L87 Difference]: Start difference. First operand 8460 states and 26279 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:57,444 INFO L93 Difference]: Finished difference Result 9239 states and 27893 transitions. [2022-03-03 18:46:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 18:46:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:57,458 INFO L225 Difference]: With dead ends: 9239 [2022-03-03 18:46:57,458 INFO L226 Difference]: Without dead ends: 9227 [2022-03-03 18:46:57,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:46:57,460 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:57,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 202 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:46:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2022-03-03 18:46:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 8490. [2022-03-03 18:46:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8489 states have (on average 3.107197549770291) internal successors, (26377), 8489 states have internal predecessors, (26377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 26377 transitions. [2022-03-03 18:46:57,604 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 26377 transitions. Word has length 24 [2022-03-03 18:46:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:57,604 INFO L470 AbstractCegarLoop]: Abstraction has 8490 states and 26377 transitions. [2022-03-03 18:46:57,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 26377 transitions. [2022-03-03 18:46:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:57,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:57,616 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:57,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-03-03 18:46:57,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-03-03 18:46:57,816 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1385764427, now seen corresponding path program 347 times [2022-03-03 18:46:57,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:57,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836372673] [2022-03-03 18:46:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:57,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:57,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836372673] [2022-03-03 18:46:57,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836372673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:57,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476336278] [2022-03-03 18:46:57,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:46:57,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:57,872 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:57,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-03-03 18:46:57,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:46:57,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:57,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:58,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:58,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476336278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:58,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:58,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-03-03 18:46:58,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115715986] [2022-03-03 18:46:58,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:58,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:58,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:58,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:58,067 INFO L87 Difference]: Start difference. First operand 8490 states and 26377 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:46:58,885 INFO L93 Difference]: Finished difference Result 10604 states and 31742 transitions. [2022-03-03 18:46:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 18:46:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:46:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:46:58,904 INFO L225 Difference]: With dead ends: 10604 [2022-03-03 18:46:58,904 INFO L226 Difference]: Without dead ends: 10586 [2022-03-03 18:46:58,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:46:58,905 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 259 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:46:58,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 247 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:46:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2022-03-03 18:46:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 8963. [2022-03-03 18:46:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 3.121513055121625) internal successors, (27975), 8962 states have internal predecessors, (27975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 27975 transitions. [2022-03-03 18:46:59,130 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 27975 transitions. Word has length 24 [2022-03-03 18:46:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:46:59,130 INFO L470 AbstractCegarLoop]: Abstraction has 8963 states and 27975 transitions. [2022-03-03 18:46:59,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:46:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 27975 transitions. [2022-03-03 18:46:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:46:59,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:46:59,143 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:46:59,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-03-03 18:46:59,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:59,344 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:46:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:46:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash 921173323, now seen corresponding path program 348 times [2022-03-03 18:46:59,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:46:59,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898406070] [2022-03-03 18:46:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:46:59,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:46:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:46:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:59,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:46:59,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898406070] [2022-03-03 18:46:59,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898406070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:46:59,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679991899] [2022-03-03 18:46:59,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:46:59,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:46:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:46:59,406 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:46:59,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-03-03 18:46:59,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 18:46:59,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:46:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:46:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:46:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:46:59,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:46:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:46:59,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679991899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:46:59,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:46:59,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-03-03 18:46:59,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357681835] [2022-03-03 18:46:59,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:46:59,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:46:59,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:46:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:46:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:46:59,607 INFO L87 Difference]: Start difference. First operand 8963 states and 27975 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:00,648 INFO L93 Difference]: Finished difference Result 9967 states and 30031 transitions. [2022-03-03 18:47:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 18:47:00,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:00,667 INFO L225 Difference]: With dead ends: 9967 [2022-03-03 18:47:00,667 INFO L226 Difference]: Without dead ends: 9961 [2022-03-03 18:47:00,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 18:47:00,669 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 270 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:00,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 191 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2022-03-03 18:47:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8724. [2022-03-03 18:47:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8724 states, 8723 states have (on average 3.112690588100424) internal successors, (27152), 8723 states have internal predecessors, (27152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 27152 transitions. [2022-03-03 18:47:00,851 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 27152 transitions. Word has length 24 [2022-03-03 18:47:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:00,851 INFO L470 AbstractCegarLoop]: Abstraction has 8724 states and 27152 transitions. [2022-03-03 18:47:00,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 27152 transitions. [2022-03-03 18:47:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:00,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:00,865 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:00,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-03-03 18:47:01,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:01,066 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:01,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash 887574095, now seen corresponding path program 349 times [2022-03-03 18:47:01,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:01,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544082656] [2022-03-03 18:47:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:01,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:01,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544082656] [2022-03-03 18:47:01,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544082656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:01,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116084581] [2022-03-03 18:47:01,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:47:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:01,144 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:01,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-03-03 18:47:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:01,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:01,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116084581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:01,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:01,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 23 [2022-03-03 18:47:01,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568155136] [2022-03-03 18:47:01,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:01,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:47:01,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:47:01,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:47:01,389 INFO L87 Difference]: Start difference. First operand 8724 states and 27152 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:02,334 INFO L93 Difference]: Finished difference Result 9884 states and 29758 transitions. [2022-03-03 18:47:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 18:47:02,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:02,350 INFO L225 Difference]: With dead ends: 9884 [2022-03-03 18:47:02,351 INFO L226 Difference]: Without dead ends: 9874 [2022-03-03 18:47:02,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 18:47:02,352 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 273 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:02,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 177 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2022-03-03 18:47:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8701. [2022-03-03 18:47:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 3.1133333333333333) internal successors, (27086), 8700 states have internal predecessors, (27086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 27086 transitions. [2022-03-03 18:47:02,537 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 27086 transitions. Word has length 24 [2022-03-03 18:47:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:02,537 INFO L470 AbstractCegarLoop]: Abstraction has 8701 states and 27086 transitions. [2022-03-03 18:47:02,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 27086 transitions. [2022-03-03 18:47:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:02,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:02,550 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:02,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-03-03 18:47:02,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:02,750 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash -154001973, now seen corresponding path program 350 times [2022-03-03 18:47:02,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:02,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94740518] [2022-03-03 18:47:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:02,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:02,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94740518] [2022-03-03 18:47:02,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94740518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:02,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409257040] [2022-03-03 18:47:02,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:47:02,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:02,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:02,820 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:02,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-03-03 18:47:02,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:47:02,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:02,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:02,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:02,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:03,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409257040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:03,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:03,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 24 [2022-03-03 18:47:03,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167793340] [2022-03-03 18:47:03,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:03,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:47:03,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:47:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:47:03,018 INFO L87 Difference]: Start difference. First operand 8701 states and 27086 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:03,995 INFO L93 Difference]: Finished difference Result 9922 states and 29903 transitions. [2022-03-03 18:47:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 18:47:03,995 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:04,014 INFO L225 Difference]: With dead ends: 9922 [2022-03-03 18:47:04,014 INFO L226 Difference]: Without dead ends: 9904 [2022-03-03 18:47:04,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 18:47:04,015 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 205 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:04,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 266 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2022-03-03 18:47:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 8685. [2022-03-03 18:47:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 3.1182634730538923) internal successors, (27079), 8684 states have internal predecessors, (27079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 27079 transitions. [2022-03-03 18:47:04,209 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 27079 transitions. Word has length 24 [2022-03-03 18:47:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:04,209 INFO L470 AbstractCegarLoop]: Abstraction has 8685 states and 27079 transitions. [2022-03-03 18:47:04,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 27079 transitions. [2022-03-03 18:47:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:04,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:04,224 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:04,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-03-03 18:47:04,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2022-03-03 18:47:04,425 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1916878287, now seen corresponding path program 351 times [2022-03-03 18:47:04,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:04,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519375860] [2022-03-03 18:47:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:04,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:04,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519375860] [2022-03-03 18:47:04,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519375860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:04,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803564057] [2022-03-03 18:47:04,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:47:04,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:04,520 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:04,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-03-03 18:47:04,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:47:04,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:04,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:04,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:04,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803564057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:04,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:04,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-03-03 18:47:04,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747315594] [2022-03-03 18:47:04,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:04,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:47:04,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:04,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:47:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:47:04,789 INFO L87 Difference]: Start difference. First operand 8685 states and 27079 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:05,626 INFO L93 Difference]: Finished difference Result 9621 states and 29138 transitions. [2022-03-03 18:47:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 18:47:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:05,645 INFO L225 Difference]: With dead ends: 9621 [2022-03-03 18:47:05,645 INFO L226 Difference]: Without dead ends: 9605 [2022-03-03 18:47:05,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:47:05,646 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:05,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 146 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2022-03-03 18:47:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8716. [2022-03-03 18:47:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 3.119219736087206) internal successors, (27184), 8715 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 27184 transitions. [2022-03-03 18:47:05,830 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 27184 transitions. Word has length 24 [2022-03-03 18:47:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:05,830 INFO L470 AbstractCegarLoop]: Abstraction has 8716 states and 27184 transitions. [2022-03-03 18:47:05,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 27184 transitions. [2022-03-03 18:47:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:05,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:05,843 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:05,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-03-03 18:47:06,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:06,043 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1123711993, now seen corresponding path program 352 times [2022-03-03 18:47:06,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:06,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634967859] [2022-03-03 18:47:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:06,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:06,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634967859] [2022-03-03 18:47:06,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634967859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:06,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114146874] [2022-03-03 18:47:06,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:47:06,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:06,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:06,096 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:06,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-03-03 18:47:06,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:47:06,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:06,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:06,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:06,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:06,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114146874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:06,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:06,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-03-03 18:47:06,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080527423] [2022-03-03 18:47:06,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:06,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:06,294 INFO L87 Difference]: Start difference. First operand 8716 states and 27184 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:07,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:07,063 INFO L93 Difference]: Finished difference Result 11348 states and 34100 transitions. [2022-03-03 18:47:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 18:47:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:07,084 INFO L225 Difference]: With dead ends: 11348 [2022-03-03 18:47:07,084 INFO L226 Difference]: Without dead ends: 11333 [2022-03-03 18:47:07,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:47:07,085 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 332 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:07,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 197 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2022-03-03 18:47:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 9625. [2022-03-03 18:47:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 3.1397547797173733) internal successors, (30217), 9624 states have internal predecessors, (30217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 30217 transitions. [2022-03-03 18:47:07,274 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 30217 transitions. Word has length 24 [2022-03-03 18:47:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:07,274 INFO L470 AbstractCegarLoop]: Abstraction has 9625 states and 30217 transitions. [2022-03-03 18:47:07,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 30217 transitions. [2022-03-03 18:47:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:07,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:07,287 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:07,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-03-03 18:47:07,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-03-03 18:47:07,488 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1588303097, now seen corresponding path program 353 times [2022-03-03 18:47:07,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:07,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128432632] [2022-03-03 18:47:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:07,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:07,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:07,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128432632] [2022-03-03 18:47:07,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128432632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:07,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809574299] [2022-03-03 18:47:07,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:47:07,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:07,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:07,539 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:07,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-03-03 18:47:07,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:47:07,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:07,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:07,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:07,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809574299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:07,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:07,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-03-03 18:47:07,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102895268] [2022-03-03 18:47:07,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:07,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:07,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:07,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:07,734 INFO L87 Difference]: Start difference. First operand 9625 states and 30217 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:08,885 INFO L93 Difference]: Finished difference Result 10893 states and 32965 transitions. [2022-03-03 18:47:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-03 18:47:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:08,905 INFO L225 Difference]: With dead ends: 10893 [2022-03-03 18:47:08,905 INFO L226 Difference]: Without dead ends: 10887 [2022-03-03 18:47:08,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 18:47:08,907 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 289 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:08,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 206 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2022-03-03 18:47:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9443. [2022-03-03 18:47:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.133869942808727) internal successors, (29590), 9442 states have internal predecessors, (29590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 29590 transitions. [2022-03-03 18:47:09,112 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 29590 transitions. Word has length 24 [2022-03-03 18:47:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:09,112 INFO L470 AbstractCegarLoop]: Abstraction has 9443 states and 29590 transitions. [2022-03-03 18:47:09,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 29590 transitions. [2022-03-03 18:47:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:09,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:09,126 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:09,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-03-03 18:47:09,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-03-03 18:47:09,327 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:09,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:09,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1621902325, now seen corresponding path program 354 times [2022-03-03 18:47:09,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:09,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580446674] [2022-03-03 18:47:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:09,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:09,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:09,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580446674] [2022-03-03 18:47:09,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580446674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:09,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923322783] [2022-03-03 18:47:09,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:47:09,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:09,383 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:09,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-03-03 18:47:09,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:47:09,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:09,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:09,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:09,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923322783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:09,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:09,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 23 [2022-03-03 18:47:09,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871697956] [2022-03-03 18:47:09,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:09,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:47:09,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:47:09,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:47:09,585 INFO L87 Difference]: Start difference. First operand 9443 states and 29590 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:10,643 INFO L93 Difference]: Finished difference Result 10963 states and 33243 transitions. [2022-03-03 18:47:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 18:47:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:10,663 INFO L225 Difference]: With dead ends: 10963 [2022-03-03 18:47:10,663 INFO L226 Difference]: Without dead ends: 10955 [2022-03-03 18:47:10,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 18:47:10,665 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 226 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:10,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 229 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2022-03-03 18:47:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 9488. [2022-03-03 18:47:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9488 states, 9487 states have (on average 3.1347106566880996) internal successors, (29739), 9487 states have internal predecessors, (29739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 29739 transitions. [2022-03-03 18:47:10,857 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 29739 transitions. Word has length 24 [2022-03-03 18:47:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:10,857 INFO L470 AbstractCegarLoop]: Abstraction has 9488 states and 29739 transitions. [2022-03-03 18:47:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 29739 transitions. [2022-03-03 18:47:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:10,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:10,873 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:10,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-03-03 18:47:11,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-03-03 18:47:11,074 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1631488903, now seen corresponding path program 355 times [2022-03-03 18:47:11,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:11,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105000532] [2022-03-03 18:47:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:11,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:11,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105000532] [2022-03-03 18:47:11,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105000532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:11,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416356408] [2022-03-03 18:47:11,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:47:11,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:11,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:11,140 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:11,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-03-03 18:47:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:11,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:11,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:11,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416356408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:11,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:11,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 24 [2022-03-03 18:47:11,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349630057] [2022-03-03 18:47:11,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:11,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:47:11,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:11,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:47:11,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:47:11,351 INFO L87 Difference]: Start difference. First operand 9488 states and 29739 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:12,428 INFO L93 Difference]: Finished difference Result 11074 states and 33620 transitions. [2022-03-03 18:47:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-03 18:47:12,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:12,454 INFO L225 Difference]: With dead ends: 11074 [2022-03-03 18:47:12,454 INFO L226 Difference]: Without dead ends: 11062 [2022-03-03 18:47:12,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 18:47:12,455 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 244 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:12,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 213 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2022-03-03 18:47:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9716. [2022-03-03 18:47:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9716 states, 9715 states have (on average 3.138548636129696) internal successors, (30491), 9715 states have internal predecessors, (30491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 30491 transitions. [2022-03-03 18:47:12,668 INFO L78 Accepts]: Start accepts. Automaton has 9716 states and 30491 transitions. Word has length 24 [2022-03-03 18:47:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:12,668 INFO L470 AbstractCegarLoop]: Abstraction has 9716 states and 30491 transitions. [2022-03-03 18:47:12,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9716 states and 30491 transitions. [2022-03-03 18:47:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:12,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:12,685 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:12,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2022-03-03 18:47:12,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:12,886 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash -592598133, now seen corresponding path program 356 times [2022-03-03 18:47:12,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:12,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263354103] [2022-03-03 18:47:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:12,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:12,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263354103] [2022-03-03 18:47:12,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263354103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:12,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315802481] [2022-03-03 18:47:12,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:47:12,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:12,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:12,964 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:12,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-03-03 18:47:12,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:47:12,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:13,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:13,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315802481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:13,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:13,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-03-03 18:47:13,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026434724] [2022-03-03 18:47:13,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:13,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:47:13,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:47:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:47:13,185 INFO L87 Difference]: Start difference. First operand 9716 states and 30491 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:14,163 INFO L93 Difference]: Finished difference Result 11386 states and 34650 transitions. [2022-03-03 18:47:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 18:47:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:14,185 INFO L225 Difference]: With dead ends: 11386 [2022-03-03 18:47:14,185 INFO L226 Difference]: Without dead ends: 11370 [2022-03-03 18:47:14,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 18:47:14,186 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 205 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:14,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 230 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:14,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2022-03-03 18:47:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 9979. [2022-03-03 18:47:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 3.1449188214070958) internal successors, (31380), 9978 states have internal predecessors, (31380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 31380 transitions. [2022-03-03 18:47:14,380 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 31380 transitions. Word has length 24 [2022-03-03 18:47:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:14,380 INFO L470 AbstractCegarLoop]: Abstraction has 9979 states and 31380 transitions. [2022-03-03 18:47:14,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 31380 transitions. [2022-03-03 18:47:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:14,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:14,395 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:14,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-03-03 18:47:14,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-03-03 18:47:14,595 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash -819819513, now seen corresponding path program 357 times [2022-03-03 18:47:14,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:14,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741320961] [2022-03-03 18:47:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:14,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:14,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741320961] [2022-03-03 18:47:14,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741320961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:14,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361603974] [2022-03-03 18:47:14,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:47:14,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:14,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:14,676 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:14,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-03-03 18:47:14,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:47:14,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:14,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:14,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361603974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:14,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:14,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-03-03 18:47:14,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566824589] [2022-03-03 18:47:14,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:14,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:47:14,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:47:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:47:14,897 INFO L87 Difference]: Start difference. First operand 9979 states and 31380 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:15,730 INFO L93 Difference]: Finished difference Result 11190 states and 34200 transitions. [2022-03-03 18:47:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 18:47:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:15,752 INFO L225 Difference]: With dead ends: 11190 [2022-03-03 18:47:15,752 INFO L226 Difference]: Without dead ends: 11170 [2022-03-03 18:47:15,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 18:47:15,753 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:15,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 174 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11170 states. [2022-03-03 18:47:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11170 to 10023. [2022-03-03 18:47:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10023 states, 10022 states have (on average 3.1446817002594294) internal successors, (31516), 10022 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10023 states to 10023 states and 31516 transitions. [2022-03-03 18:47:15,933 INFO L78 Accepts]: Start accepts. Automaton has 10023 states and 31516 transitions. Word has length 24 [2022-03-03 18:47:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:15,933 INFO L470 AbstractCegarLoop]: Abstraction has 10023 states and 31516 transitions. [2022-03-03 18:47:15,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10023 states and 31516 transitions. [2022-03-03 18:47:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:15,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:15,947 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:15,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-03-03 18:47:16,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2022-03-03 18:47:16,148 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1608069685, now seen corresponding path program 358 times [2022-03-03 18:47:16,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:16,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399832927] [2022-03-03 18:47:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:16,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:16,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399832927] [2022-03-03 18:47:16,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399832927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:16,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433243849] [2022-03-03 18:47:16,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:47:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:16,196 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:16,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-03-03 18:47:16,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:47:16,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:16,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:16,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:16,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433243849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:16,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:16,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-03-03 18:47:16,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419837594] [2022-03-03 18:47:16,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:16,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:16,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:16,400 INFO L87 Difference]: Start difference. First operand 10023 states and 31516 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:17,266 INFO L93 Difference]: Finished difference Result 14250 states and 43629 transitions. [2022-03-03 18:47:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 18:47:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:17,307 INFO L225 Difference]: With dead ends: 14250 [2022-03-03 18:47:17,307 INFO L226 Difference]: Without dead ends: 14238 [2022-03-03 18:47:17,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:47:17,308 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 284 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:17,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 317 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:47:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14238 states. [2022-03-03 18:47:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14238 to 11906. [2022-03-03 18:47:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11906 states, 11905 states have (on average 3.1850482990340194) internal successors, (37918), 11905 states have internal predecessors, (37918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 37918 transitions. [2022-03-03 18:47:17,603 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 37918 transitions. Word has length 24 [2022-03-03 18:47:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:17,603 INFO L470 AbstractCegarLoop]: Abstraction has 11906 states and 37918 transitions. [2022-03-03 18:47:17,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 37918 transitions. [2022-03-03 18:47:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:17,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:17,620 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:17,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-03-03 18:47:17,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:17,821 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2072660789, now seen corresponding path program 359 times [2022-03-03 18:47:17,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:17,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540877689] [2022-03-03 18:47:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:17,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:17,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:17,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540877689] [2022-03-03 18:47:17,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540877689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:17,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155995359] [2022-03-03 18:47:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:47:17,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:17,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:17,868 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:17,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-03-03 18:47:17,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:47:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:18,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:18,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155995359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:18,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:18,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-03-03 18:47:18,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073936119] [2022-03-03 18:47:18,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:18,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:18,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:18,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:18,102 INFO L87 Difference]: Start difference. First operand 11906 states and 37918 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:19,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:19,381 INFO L93 Difference]: Finished difference Result 13468 states and 41406 transitions. [2022-03-03 18:47:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 18:47:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:19,406 INFO L225 Difference]: With dead ends: 13468 [2022-03-03 18:47:19,407 INFO L226 Difference]: Without dead ends: 13464 [2022-03-03 18:47:19,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 18:47:19,408 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 285 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:19,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 190 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:47:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13464 states. [2022-03-03 18:47:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13464 to 11668. [2022-03-03 18:47:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11668 states, 11667 states have (on average 3.1784520442273076) internal successors, (37083), 11667 states have internal predecessors, (37083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 37083 transitions. [2022-03-03 18:47:19,629 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 37083 transitions. Word has length 24 [2022-03-03 18:47:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:19,629 INFO L470 AbstractCegarLoop]: Abstraction has 11668 states and 37083 transitions. [2022-03-03 18:47:19,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 37083 transitions. [2022-03-03 18:47:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:19,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:19,646 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:19,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-03-03 18:47:19,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:19,846 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2106260017, now seen corresponding path program 360 times [2022-03-03 18:47:19,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:19,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659027295] [2022-03-03 18:47:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:19,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:19,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:19,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659027295] [2022-03-03 18:47:19,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659027295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:19,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027040686] [2022-03-03 18:47:19,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:47:19,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:19,899 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:19,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-03-03 18:47:19,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:47:19,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:19,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:20,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:20,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027040686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:20,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:20,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 23 [2022-03-03 18:47:20,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838150861] [2022-03-03 18:47:20,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:20,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:47:20,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:47:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:47:20,104 INFO L87 Difference]: Start difference. First operand 11668 states and 37083 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:21,281 INFO L93 Difference]: Finished difference Result 13667 states and 42198 transitions. [2022-03-03 18:47:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-03 18:47:21,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:21,308 INFO L225 Difference]: With dead ends: 13667 [2022-03-03 18:47:21,308 INFO L226 Difference]: Without dead ends: 13659 [2022-03-03 18:47:21,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 18:47:21,310 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 281 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:21,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 212 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:47:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2022-03-03 18:47:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 11875. [2022-03-03 18:47:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11875 states, 11874 states have (on average 3.1847734546067037) internal successors, (37816), 11874 states have internal predecessors, (37816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 37816 transitions. [2022-03-03 18:47:21,587 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 37816 transitions. Word has length 24 [2022-03-03 18:47:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:21,587 INFO L470 AbstractCegarLoop]: Abstraction has 11875 states and 37816 transitions. [2022-03-03 18:47:21,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 37816 transitions. [2022-03-03 18:47:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:21,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:21,605 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:21,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-03-03 18:47:21,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:21,806 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:21,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1147131211, now seen corresponding path program 361 times [2022-03-03 18:47:21,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:21,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320157325] [2022-03-03 18:47:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:21,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:21,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:21,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320157325] [2022-03-03 18:47:21,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320157325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:21,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708811568] [2022-03-03 18:47:21,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:47:21,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:21,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:21,876 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:21,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-03-03 18:47:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:22,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:22,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708811568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:22,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:22,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 24 [2022-03-03 18:47:22,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787227931] [2022-03-03 18:47:22,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:22,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:47:22,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:47:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:47:22,083 INFO L87 Difference]: Start difference. First operand 11875 states and 37816 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:23,150 INFO L93 Difference]: Finished difference Result 14012 states and 43421 transitions. [2022-03-03 18:47:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 18:47:23,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:23,178 INFO L225 Difference]: With dead ends: 14012 [2022-03-03 18:47:23,179 INFO L226 Difference]: Without dead ends: 14000 [2022-03-03 18:47:23,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 18:47:23,180 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 299 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:23,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 166 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2022-03-03 18:47:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 12230. [2022-03-03 18:47:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12230 states, 12229 states have (on average 3.1900400686891817) internal successors, (39011), 12229 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 39011 transitions. [2022-03-03 18:47:23,422 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 39011 transitions. Word has length 24 [2022-03-03 18:47:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 12230 states and 39011 transitions. [2022-03-03 18:47:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 39011 transitions. [2022-03-03 18:47:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:23,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:23,441 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:23,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-03-03 18:47:23,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:23,642 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1076955825, now seen corresponding path program 362 times [2022-03-03 18:47:23,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:23,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311119416] [2022-03-03 18:47:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:23,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:23,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311119416] [2022-03-03 18:47:23,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311119416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:23,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713497663] [2022-03-03 18:47:23,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:47:23,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:23,706 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:23,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-03-03 18:47:23,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:47:23,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:23,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:23,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:23,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:23,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713497663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:23,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:23,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 25 [2022-03-03 18:47:23,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064381221] [2022-03-03 18:47:23,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:23,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:47:23,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:47:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:47:23,923 INFO L87 Difference]: Start difference. First operand 12230 states and 39011 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:24,976 INFO L93 Difference]: Finished difference Result 14528 states and 45137 transitions. [2022-03-03 18:47:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 18:47:24,977 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:25,007 INFO L225 Difference]: With dead ends: 14528 [2022-03-03 18:47:25,007 INFO L226 Difference]: Without dead ends: 14512 [2022-03-03 18:47:25,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 18:47:25,008 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 280 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:25,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 192 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2022-03-03 18:47:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 13019. [2022-03-03 18:47:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13019 states, 13018 states have (on average 3.197649408511292) internal successors, (41627), 13018 states have internal predecessors, (41627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 41627 transitions. [2022-03-03 18:47:25,275 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 41627 transitions. Word has length 24 [2022-03-03 18:47:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:25,275 INFO L470 AbstractCegarLoop]: Abstraction has 13019 states and 41627 transitions. [2022-03-03 18:47:25,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 41627 transitions. [2022-03-03 18:47:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:25,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:25,297 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:25,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-03-03 18:47:25,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-03-03 18:47:25,497 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1304177205, now seen corresponding path program 363 times [2022-03-03 18:47:25,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:25,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684588337] [2022-03-03 18:47:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:25,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:25,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:25,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684588337] [2022-03-03 18:47:25,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684588337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:25,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443947095] [2022-03-03 18:47:25,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:47:25,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:25,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:25,567 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:25,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-03-03 18:47:25,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:47:25,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:25,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:47:25,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443947095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:25,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:25,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 26 [2022-03-03 18:47:25,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808096960] [2022-03-03 18:47:25,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:25,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:47:25,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:47:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:47:25,787 INFO L87 Difference]: Start difference. First operand 13019 states and 41627 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:26,721 INFO L93 Difference]: Finished difference Result 15354 states and 47888 transitions. [2022-03-03 18:47:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 18:47:26,721 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:26,751 INFO L225 Difference]: With dead ends: 15354 [2022-03-03 18:47:26,751 INFO L226 Difference]: Without dead ends: 15334 [2022-03-03 18:47:26,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:47:26,752 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 253 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:26,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 179 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2022-03-03 18:47:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 13814. [2022-03-03 18:47:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13814 states, 13813 states have (on average 3.2055310215014843) internal successors, (44278), 13813 states have internal predecessors, (44278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13814 states to 13814 states and 44278 transitions. [2022-03-03 18:47:27,062 INFO L78 Accepts]: Start accepts. Automaton has 13814 states and 44278 transitions. Word has length 24 [2022-03-03 18:47:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:27,063 INFO L470 AbstractCegarLoop]: Abstraction has 13814 states and 44278 transitions. [2022-03-03 18:47:27,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13814 states and 44278 transitions. [2022-03-03 18:47:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:27,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:27,085 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:27,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-03-03 18:47:27,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-03-03 18:47:27,286 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash 241894607, now seen corresponding path program 364 times [2022-03-03 18:47:27,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:27,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367908580] [2022-03-03 18:47:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:27,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:27,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367908580] [2022-03-03 18:47:27,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367908580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:27,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882963599] [2022-03-03 18:47:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:47:27,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:27,362 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:27,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-03-03 18:47:27,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:47:27,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:27,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:27,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:27,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882963599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:27,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:27,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-03-03 18:47:27,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983573414] [2022-03-03 18:47:27,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:27,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:47:27,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:27,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:47:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:47:27,590 INFO L87 Difference]: Start difference. First operand 13814 states and 44278 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:28,388 INFO L93 Difference]: Finished difference Result 15273 states and 47830 transitions. [2022-03-03 18:47:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 18:47:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:28,416 INFO L225 Difference]: With dead ends: 15273 [2022-03-03 18:47:28,416 INFO L226 Difference]: Without dead ends: 15249 [2022-03-03 18:47:28,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 18:47:28,418 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:28,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 163 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2022-03-03 18:47:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 13872. [2022-03-03 18:47:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13872 states, 13871 states have (on average 3.205248359887535) internal successors, (44460), 13871 states have internal predecessors, (44460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 44460 transitions. [2022-03-03 18:47:28,681 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 44460 transitions. Word has length 24 [2022-03-03 18:47:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:28,682 INFO L470 AbstractCegarLoop]: Abstraction has 13872 states and 44460 transitions. [2022-03-03 18:47:28,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 44460 transitions. [2022-03-03 18:47:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:28,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:28,703 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:28,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-03-03 18:47:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:28,904 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -569197233, now seen corresponding path program 365 times [2022-03-03 18:47:28,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:28,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141833122] [2022-03-03 18:47:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:28,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:28,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:28,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141833122] [2022-03-03 18:47:28,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141833122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:28,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310801028] [2022-03-03 18:47:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:47:28,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:28,975 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:28,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-03-03 18:47:29,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:47:29,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:29,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310801028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:29,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:29,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-03-03 18:47:29,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598735085] [2022-03-03 18:47:29,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:29,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:47:29,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:47:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:47:29,128 INFO L87 Difference]: Start difference. First operand 13872 states and 44460 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:29,375 INFO L93 Difference]: Finished difference Result 16092 states and 50859 transitions. [2022-03-03 18:47:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:47:29,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:29,406 INFO L225 Difference]: With dead ends: 16092 [2022-03-03 18:47:29,406 INFO L226 Difference]: Without dead ends: 16092 [2022-03-03 18:47:29,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:47:29,406 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:29,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 112 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:47:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2022-03-03 18:47:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 13964. [2022-03-03 18:47:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13964 states, 13963 states have (on average 3.2041108644274154) internal successors, (44739), 13963 states have internal predecessors, (44739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 44739 transitions. [2022-03-03 18:47:29,674 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 44739 transitions. Word has length 24 [2022-03-03 18:47:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:29,674 INFO L470 AbstractCegarLoop]: Abstraction has 13964 states and 44739 transitions. [2022-03-03 18:47:29,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 44739 transitions. [2022-03-03 18:47:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:29,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:29,697 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:29,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-03-03 18:47:29,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-03-03 18:47:29,897 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash 237042051, now seen corresponding path program 366 times [2022-03-03 18:47:29,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:29,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530391446] [2022-03-03 18:47:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:29,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:29,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:29,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530391446] [2022-03-03 18:47:29,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530391446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:29,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291009325] [2022-03-03 18:47:29,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:47:29,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:29,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:29,971 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:29,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-03-03 18:47:29,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:47:29,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:30,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:30,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291009325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:30,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:30,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:30,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375965076] [2022-03-03 18:47:30,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:30,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:30,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:30,135 INFO L87 Difference]: Start difference. First operand 13964 states and 44739 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:30,460 INFO L93 Difference]: Finished difference Result 14987 states and 47521 transitions. [2022-03-03 18:47:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 18:47:30,461 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:30,493 INFO L225 Difference]: With dead ends: 14987 [2022-03-03 18:47:30,493 INFO L226 Difference]: Without dead ends: 14987 [2022-03-03 18:47:30,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:47:30,494 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:30,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 154 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2022-03-03 18:47:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 14007. [2022-03-03 18:47:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14007 states, 14006 states have (on average 3.203484221048122) internal successors, (44868), 14006 states have internal predecessors, (44868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 44868 transitions. [2022-03-03 18:47:30,891 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 44868 transitions. Word has length 24 [2022-03-03 18:47:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:30,892 INFO L470 AbstractCegarLoop]: Abstraction has 14007 states and 44868 transitions. [2022-03-03 18:47:30,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 44868 transitions. [2022-03-03 18:47:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:30,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:30,916 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:30,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-03-03 18:47:31,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:31,116 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1085664523, now seen corresponding path program 367 times [2022-03-03 18:47:31,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:31,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347252205] [2022-03-03 18:47:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:31,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:31,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:31,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347252205] [2022-03-03 18:47:31,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347252205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:31,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888788613] [2022-03-03 18:47:31,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:47:31,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:31,189 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:31,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-03-03 18:47:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:31,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:31,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888788613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:31,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:31,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:31,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517352887] [2022-03-03 18:47:31,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:31,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:31,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:31,398 INFO L87 Difference]: Start difference. First operand 14007 states and 44868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:31,834 INFO L93 Difference]: Finished difference Result 15501 states and 48982 transitions. [2022-03-03 18:47:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 18:47:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:31,865 INFO L225 Difference]: With dead ends: 15501 [2022-03-03 18:47:31,865 INFO L226 Difference]: Without dead ends: 15501 [2022-03-03 18:47:31,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 18:47:31,866 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:31,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 147 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2022-03-03 18:47:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 14056. [2022-03-03 18:47:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14056 states, 14055 states have (on average 3.2027748132337246) internal successors, (45015), 14055 states have internal predecessors, (45015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 45015 transitions. [2022-03-03 18:47:32,142 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 45015 transitions. Word has length 24 [2022-03-03 18:47:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:32,142 INFO L470 AbstractCegarLoop]: Abstraction has 14056 states and 45015 transitions. [2022-03-03 18:47:32,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 45015 transitions. [2022-03-03 18:47:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:32,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:32,165 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:32,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-03-03 18:47:32,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:32,365 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1519359869, now seen corresponding path program 368 times [2022-03-03 18:47:32,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:32,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388175998] [2022-03-03 18:47:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:32,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:32,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388175998] [2022-03-03 18:47:32,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388175998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:32,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984587640] [2022-03-03 18:47:32,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:47:32,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:32,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:32,437 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:32,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-03-03 18:47:32,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:47:32,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:32,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:32,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:32,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:32,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984587640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:32,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:32,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:32,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939411616] [2022-03-03 18:47:32,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:32,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:32,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:32,604 INFO L87 Difference]: Start difference. First operand 14056 states and 45015 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:33,217 INFO L93 Difference]: Finished difference Result 15602 states and 49176 transitions. [2022-03-03 18:47:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 18:47:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:33,249 INFO L225 Difference]: With dead ends: 15602 [2022-03-03 18:47:33,249 INFO L226 Difference]: Without dead ends: 15602 [2022-03-03 18:47:33,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 18:47:33,249 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:33,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 133 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2022-03-03 18:47:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 14172. [2022-03-03 18:47:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14172 states, 14171 states have (on average 3.2011149530731777) internal successors, (45363), 14171 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 45363 transitions. [2022-03-03 18:47:33,598 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 45363 transitions. Word has length 24 [2022-03-03 18:47:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 14172 states and 45363 transitions. [2022-03-03 18:47:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 45363 transitions. [2022-03-03 18:47:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:33,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:33,622 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:33,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-03-03 18:47:33,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2022-03-03 18:47:33,823 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -633561589, now seen corresponding path program 369 times [2022-03-03 18:47:33,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:33,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753268249] [2022-03-03 18:47:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:33,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:33,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:33,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753268249] [2022-03-03 18:47:33,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753268249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:33,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319947410] [2022-03-03 18:47:33,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:47:33,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:33,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:33,895 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:33,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-03-03 18:47:33,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:47:33,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:34,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:34,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319947410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:34,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:34,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:34,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572084388] [2022-03-03 18:47:34,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:34,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:34,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:34,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:34,061 INFO L87 Difference]: Start difference. First operand 14172 states and 45363 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:34,883 INFO L93 Difference]: Finished difference Result 15707 states and 49378 transitions. [2022-03-03 18:47:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:47:34,883 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:34,917 INFO L225 Difference]: With dead ends: 15707 [2022-03-03 18:47:34,917 INFO L226 Difference]: Without dead ends: 15707 [2022-03-03 18:47:34,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1756, Invalid=3500, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 18:47:34,918 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:34,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 179 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2022-03-03 18:47:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 14281. [2022-03-03 18:47:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14281 states, 14280 states have (on average 3.1997198879551823) internal successors, (45692), 14280 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14281 states to 14281 states and 45692 transitions. [2022-03-03 18:47:35,214 INFO L78 Accepts]: Start accepts. Automaton has 14281 states and 45692 transitions. Word has length 24 [2022-03-03 18:47:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:35,214 INFO L470 AbstractCegarLoop]: Abstraction has 14281 states and 45692 transitions. [2022-03-03 18:47:35,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 14281 states and 45692 transitions. [2022-03-03 18:47:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:35,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:35,239 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:35,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-03-03 18:47:35,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:35,439 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1473222531, now seen corresponding path program 370 times [2022-03-03 18:47:35,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:35,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958866290] [2022-03-03 18:47:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:35,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958866290] [2022-03-03 18:47:35,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958866290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78542109] [2022-03-03 18:47:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:47:35,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:35,522 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:35,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-03-03 18:47:35,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:47:35,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:35,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:35,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:35,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78542109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:35,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:35,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:35,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661855837] [2022-03-03 18:47:35,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:35,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:35,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:35,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:35,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:35,694 INFO L87 Difference]: Start difference. First operand 14281 states and 45692 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:36,697 INFO L93 Difference]: Finished difference Result 15913 states and 49910 transitions. [2022-03-03 18:47:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 18:47:36,698 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:36,752 INFO L225 Difference]: With dead ends: 15913 [2022-03-03 18:47:36,752 INFO L226 Difference]: Without dead ends: 15913 [2022-03-03 18:47:36,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2091, Invalid=4071, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 18:47:36,753 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 160 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:36,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 326 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:47:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2022-03-03 18:47:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 14413. [2022-03-03 18:47:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 3.1991396058839854) internal successors, (46106), 14412 states have internal predecessors, (46106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 46106 transitions. [2022-03-03 18:47:37,106 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 46106 transitions. Word has length 24 [2022-03-03 18:47:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:37,106 INFO L470 AbstractCegarLoop]: Abstraction has 14413 states and 46106 transitions. [2022-03-03 18:47:37,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 46106 transitions. [2022-03-03 18:47:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:37,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:37,136 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:37,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-03-03 18:47:37,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable383 [2022-03-03 18:47:37,336 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:37,336 INFO L85 PathProgramCache]: Analyzing trace with hash -675574005, now seen corresponding path program 371 times [2022-03-03 18:47:37,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:37,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581464228] [2022-03-03 18:47:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:37,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:37,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581464228] [2022-03-03 18:47:37,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581464228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353791552] [2022-03-03 18:47:37,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:47:37,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:37,413 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:37,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-03-03 18:47:37,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:47:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:37,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:37,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353791552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:37,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:37,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:37,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632999242] [2022-03-03 18:47:37,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:37,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:37,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:37,617 INFO L87 Difference]: Start difference. First operand 14413 states and 46106 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:38,593 INFO L93 Difference]: Finished difference Result 16226 states and 50863 transitions. [2022-03-03 18:47:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 18:47:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:38,642 INFO L225 Difference]: With dead ends: 16226 [2022-03-03 18:47:38,643 INFO L226 Difference]: Without dead ends: 16226 [2022-03-03 18:47:38,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 18:47:38,644 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 241 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:38,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 237 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:47:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16226 states. [2022-03-03 18:47:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16226 to 14455. [2022-03-03 18:47:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14455 states, 14454 states have (on average 3.204649232046492) internal successors, (46320), 14454 states have internal predecessors, (46320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 46320 transitions. [2022-03-03 18:47:39,110 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 46320 transitions. Word has length 24 [2022-03-03 18:47:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:39,110 INFO L470 AbstractCegarLoop]: Abstraction has 14455 states and 46320 transitions. [2022-03-03 18:47:39,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 46320 transitions. [2022-03-03 18:47:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:39,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:39,142 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:39,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-03-03 18:47:39,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:39,343 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -104119199, now seen corresponding path program 372 times [2022-03-03 18:47:39,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:39,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18994133] [2022-03-03 18:47:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:39,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:39,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18994133] [2022-03-03 18:47:39,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18994133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:39,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929347042] [2022-03-03 18:47:39,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:47:39,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:39,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:39,423 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:39,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-03-03 18:47:39,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 18:47:39,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:39,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:39,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929347042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:39,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:39,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:39,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179201019] [2022-03-03 18:47:39,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:39,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:39,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:39,610 INFO L87 Difference]: Start difference. First operand 14455 states and 46320 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:40,598 INFO L93 Difference]: Finished difference Result 15474 states and 48762 transitions. [2022-03-03 18:47:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 18:47:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:40,643 INFO L225 Difference]: With dead ends: 15474 [2022-03-03 18:47:40,643 INFO L226 Difference]: Without dead ends: 15468 [2022-03-03 18:47:40,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 18:47:40,645 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:40,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 223 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:47:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15468 states. [2022-03-03 18:47:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15468 to 13787. [2022-03-03 18:47:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 13786 states have (on average 3.198752357464094) internal successors, (44098), 13786 states have internal predecessors, (44098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 44098 transitions. [2022-03-03 18:47:40,981 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 44098 transitions. Word has length 24 [2022-03-03 18:47:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:40,981 INFO L470 AbstractCegarLoop]: Abstraction has 13787 states and 44098 transitions. [2022-03-03 18:47:40,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 44098 transitions. [2022-03-03 18:47:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:41,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:41,008 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:41,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-03-03 18:47:41,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:41,209 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:41,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2035690745, now seen corresponding path program 373 times [2022-03-03 18:47:41,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:41,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154576209] [2022-03-03 18:47:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:41,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:41,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:41,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154576209] [2022-03-03 18:47:41,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154576209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:41,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756953515] [2022-03-03 18:47:41,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:47:41,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:41,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:41,284 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:41,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-03-03 18:47:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:41,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:41,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756953515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:41,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:41,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:41,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617632182] [2022-03-03 18:47:41,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:41,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:41,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:41,474 INFO L87 Difference]: Start difference. First operand 13787 states and 44098 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:42,291 INFO L93 Difference]: Finished difference Result 17863 states and 56145 transitions. [2022-03-03 18:47:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 18:47:42,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:42,344 INFO L225 Difference]: With dead ends: 17863 [2022-03-03 18:47:42,344 INFO L226 Difference]: Without dead ends: 17848 [2022-03-03 18:47:42,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:47:42,345 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 289 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:42,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 183 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17848 states. [2022-03-03 18:47:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17848 to 15969. [2022-03-03 18:47:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 15968 states have (on average 3.2116107214428857) internal successors, (51283), 15968 states have internal predecessors, (51283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 51283 transitions. [2022-03-03 18:47:42,796 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 51283 transitions. Word has length 24 [2022-03-03 18:47:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:42,796 INFO L470 AbstractCegarLoop]: Abstraction has 15969 states and 51283 transitions. [2022-03-03 18:47:42,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 51283 transitions. [2022-03-03 18:47:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:42,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:42,829 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:42,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-03-03 18:47:43,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-03-03 18:47:43,029 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1794685447, now seen corresponding path program 374 times [2022-03-03 18:47:43,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:43,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003375208] [2022-03-03 18:47:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:43,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:43,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:43,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003375208] [2022-03-03 18:47:43,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003375208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:43,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910607710] [2022-03-03 18:47:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:47:43,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:43,104 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:43,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-03-03 18:47:43,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:47:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:43,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:43,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910607710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:43,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:43,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:43,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800581050] [2022-03-03 18:47:43,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:43,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:43,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:43,289 INFO L87 Difference]: Start difference. First operand 15969 states and 51283 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:44,117 INFO L93 Difference]: Finished difference Result 17633 states and 55417 transitions. [2022-03-03 18:47:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 18:47:44,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:44,170 INFO L225 Difference]: With dead ends: 17633 [2022-03-03 18:47:44,170 INFO L226 Difference]: Without dead ends: 17629 [2022-03-03 18:47:44,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 18:47:44,171 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 327 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:44,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 149 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2022-03-03 18:47:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 15243. [2022-03-03 18:47:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15243 states, 15242 states have (on average 3.1953811835717096) internal successors, (48704), 15242 states have internal predecessors, (48704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 48704 transitions. [2022-03-03 18:47:44,550 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 48704 transitions. Word has length 24 [2022-03-03 18:47:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:44,550 INFO L470 AbstractCegarLoop]: Abstraction has 15243 states and 48704 transitions. [2022-03-03 18:47:44,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 48704 transitions. [2022-03-03 18:47:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:44,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:44,579 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:44,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-03-03 18:47:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-03-03 18:47:44,780 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1761086219, now seen corresponding path program 375 times [2022-03-03 18:47:44,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:44,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077655733] [2022-03-03 18:47:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:44,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:44,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:44,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077655733] [2022-03-03 18:47:44,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077655733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:44,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281255610] [2022-03-03 18:47:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:47:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:44,854 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:44,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-03-03 18:47:44,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:47:44,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:45,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:45,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281255610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:45,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:45,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:45,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653099614] [2022-03-03 18:47:45,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:45,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:45,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:45,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:45,040 INFO L87 Difference]: Start difference. First operand 15243 states and 48704 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:45,841 INFO L93 Difference]: Finished difference Result 17307 states and 54169 transitions. [2022-03-03 18:47:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 18:47:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:45,892 INFO L225 Difference]: With dead ends: 17307 [2022-03-03 18:47:45,892 INFO L226 Difference]: Without dead ends: 17299 [2022-03-03 18:47:45,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:47:45,893 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 228 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:45,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 181 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2022-03-03 18:47:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 15525. [2022-03-03 18:47:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15525 states, 15524 states have (on average 3.1944730739500127) internal successors, (49591), 15524 states have internal predecessors, (49591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 49591 transitions. [2022-03-03 18:47:46,263 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 49591 transitions. Word has length 24 [2022-03-03 18:47:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:46,263 INFO L470 AbstractCegarLoop]: Abstraction has 15525 states and 49591 transitions. [2022-03-03 18:47:46,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 49591 transitions. [2022-03-03 18:47:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:46,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:46,295 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:46,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-03-03 18:47:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-03-03 18:47:46,495 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash 719510151, now seen corresponding path program 376 times [2022-03-03 18:47:46,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:46,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047121105] [2022-03-03 18:47:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:46,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:46,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:46,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047121105] [2022-03-03 18:47:46,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047121105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:46,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212693986] [2022-03-03 18:47:46,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:47:46,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:46,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:46,569 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:46,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-03-03 18:47:46,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:47:46,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:46,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:46,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:46,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212693986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:46,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:46,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:46,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287465670] [2022-03-03 18:47:46,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:46,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:46,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:46,756 INFO L87 Difference]: Start difference. First operand 15525 states and 49591 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:47,443 INFO L93 Difference]: Finished difference Result 17843 states and 55959 transitions. [2022-03-03 18:47:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:47:47,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:47,480 INFO L225 Difference]: With dead ends: 17843 [2022-03-03 18:47:47,481 INFO L226 Difference]: Without dead ends: 17831 [2022-03-03 18:47:47,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:47:47,482 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 274 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:47,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 162 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2022-03-03 18:47:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 15785. [2022-03-03 18:47:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15785 states, 15784 states have (on average 3.192663456664977) internal successors, (50393), 15784 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15785 states to 15785 states and 50393 transitions. [2022-03-03 18:47:47,900 INFO L78 Accepts]: Start accepts. Automaton has 15785 states and 50393 transitions. Word has length 24 [2022-03-03 18:47:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:47,900 INFO L470 AbstractCegarLoop]: Abstraction has 15785 states and 50393 transitions. [2022-03-03 18:47:47,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 15785 states and 50393 transitions. [2022-03-03 18:47:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:47,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:47,926 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:47,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-03-03 18:47:48,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-03-03 18:47:48,127 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1504576885, now seen corresponding path program 377 times [2022-03-03 18:47:48,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:48,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921641902] [2022-03-03 18:47:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:48,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:48,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921641902] [2022-03-03 18:47:48,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921641902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:48,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456329090] [2022-03-03 18:47:48,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:47:48,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:48,197 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:48,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-03-03 18:47:48,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:47:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:48,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:48,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:48,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456329090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:48,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:48,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:48,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799360121] [2022-03-03 18:47:48,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:48,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:48,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:48,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:48,373 INFO L87 Difference]: Start difference. First operand 15785 states and 50393 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:48,989 INFO L93 Difference]: Finished difference Result 18546 states and 58331 transitions. [2022-03-03 18:47:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 18:47:48,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:49,034 INFO L225 Difference]: With dead ends: 18546 [2022-03-03 18:47:49,035 INFO L226 Difference]: Without dead ends: 18530 [2022-03-03 18:47:49,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 18:47:49,035 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 259 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:49,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 146 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2022-03-03 18:47:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 15941. [2022-03-03 18:47:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15941 states, 15940 states have (on average 3.1888331242158094) internal successors, (50830), 15940 states have internal predecessors, (50830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15941 states to 15941 states and 50830 transitions. [2022-03-03 18:47:49,381 INFO L78 Accepts]: Start accepts. Automaton has 15941 states and 50830 transitions. Word has length 24 [2022-03-03 18:47:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:49,381 INFO L470 AbstractCegarLoop]: Abstraction has 15941 states and 50830 transitions. [2022-03-03 18:47:49,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 15941 states and 50830 transitions. [2022-03-03 18:47:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:49,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:49,408 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:49,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-03-03 18:47:49,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2022-03-03 18:47:49,609 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:49,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1731798265, now seen corresponding path program 378 times [2022-03-03 18:47:49,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:49,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90385358] [2022-03-03 18:47:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:49,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:49,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:49,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90385358] [2022-03-03 18:47:49,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90385358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:49,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227199833] [2022-03-03 18:47:49,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:47:49,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:49,682 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:49,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-03-03 18:47:49,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:47:49,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:49,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:49,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:49,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227199833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:49,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:49,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:49,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251464342] [2022-03-03 18:47:49,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:49,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:49,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:49,863 INFO L87 Difference]: Start difference. First operand 15941 states and 50830 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:50,467 INFO L93 Difference]: Finished difference Result 18841 states and 59191 transitions. [2022-03-03 18:47:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:47:50,468 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:50,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:50,511 INFO L225 Difference]: With dead ends: 18841 [2022-03-03 18:47:50,512 INFO L226 Difference]: Without dead ends: 18821 [2022-03-03 18:47:50,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 18:47:50,512 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 174 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:50,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 191 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2022-03-03 18:47:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 15970. [2022-03-03 18:47:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1873003945143714) internal successors, (50898), 15969 states have internal predecessors, (50898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50898 transitions. [2022-03-03 18:47:50,931 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50898 transitions. Word has length 24 [2022-03-03 18:47:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:50,931 INFO L470 AbstractCegarLoop]: Abstraction has 15970 states and 50898 transitions. [2022-03-03 18:47:50,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50898 transitions. [2022-03-03 18:47:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:50,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:50,959 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:50,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-03-03 18:47:51,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:51,160 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -185726453, now seen corresponding path program 379 times [2022-03-03 18:47:51,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:51,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780302606] [2022-03-03 18:47:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:51,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:51,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780302606] [2022-03-03 18:47:51,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780302606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:51,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618206507] [2022-03-03 18:47:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:47:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:51,237 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:51,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-03-03 18:47:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:51,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:51,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:51,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:51,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618206507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:51,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:51,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-03 18:47:51,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756320349] [2022-03-03 18:47:51,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:51,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:51,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:51,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:51,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:51,424 INFO L87 Difference]: Start difference. First operand 15970 states and 50898 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:51,857 INFO L93 Difference]: Finished difference Result 17288 states and 54299 transitions. [2022-03-03 18:47:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 18:47:51,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:51,908 INFO L225 Difference]: With dead ends: 17288 [2022-03-03 18:47:51,908 INFO L226 Difference]: Without dead ends: 17276 [2022-03-03 18:47:51,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 18:47:51,909 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 199 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:51,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 107 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:47:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2022-03-03 18:47:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15970. [2022-03-03 18:47:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.186924666541424) internal successors, (50892), 15969 states have internal predecessors, (50892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50892 transitions. [2022-03-03 18:47:52,296 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50892 transitions. Word has length 24 [2022-03-03 18:47:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:52,296 INFO L470 AbstractCegarLoop]: Abstraction has 15970 states and 50892 transitions. [2022-03-03 18:47:52,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50892 transitions. [2022-03-03 18:47:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:52,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:52,328 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:52,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-03-03 18:47:52,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:52,529 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash -195198201, now seen corresponding path program 380 times [2022-03-03 18:47:52,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:52,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378308126] [2022-03-03 18:47:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:52,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:52,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:52,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378308126] [2022-03-03 18:47:52,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378308126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:52,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712100708] [2022-03-03 18:47:52,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:47:52,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:52,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:52,604 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:52,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-03-03 18:47:52,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:47:52,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:52,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:52,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:52,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712100708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:52,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:52,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-03-03 18:47:52,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616481157] [2022-03-03 18:47:52,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:52,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:47:52,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:47:52,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:47:52,782 INFO L87 Difference]: Start difference. First operand 15970 states and 50892 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:53,010 INFO L93 Difference]: Finished difference Result 17070 states and 53913 transitions. [2022-03-03 18:47:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:47:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:53,060 INFO L225 Difference]: With dead ends: 17070 [2022-03-03 18:47:53,060 INFO L226 Difference]: Without dead ends: 17056 [2022-03-03 18:47:53,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:47:53,060 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 93 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:53,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 101 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:47:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2022-03-03 18:47:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 15970. [2022-03-03 18:47:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1868620452125995) internal successors, (50891), 15969 states have internal predecessors, (50891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50891 transitions. [2022-03-03 18:47:53,566 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50891 transitions. Word has length 24 [2022-03-03 18:47:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:53,566 INFO L470 AbstractCegarLoop]: Abstraction has 15970 states and 50891 transitions. [2022-03-03 18:47:53,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50891 transitions. [2022-03-03 18:47:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:53,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:53,602 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:53,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-03-03 18:47:53,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:53,802 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash -539343921, now seen corresponding path program 381 times [2022-03-03 18:47:53,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:53,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56401270] [2022-03-03 18:47:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:53,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:53,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:53,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56401270] [2022-03-03 18:47:53,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56401270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:53,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214513176] [2022-03-03 18:47:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:47:53,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:53,882 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:53,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-03-03 18:47:53,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:47:53,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:54,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:54,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214513176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:54,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:54,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-03-03 18:47:54,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923981432] [2022-03-03 18:47:54,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:54,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:47:54,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:47:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:47:54,078 INFO L87 Difference]: Start difference. First operand 15970 states and 50891 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:54,768 INFO L93 Difference]: Finished difference Result 17305 states and 54554 transitions. [2022-03-03 18:47:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 18:47:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:54,820 INFO L225 Difference]: With dead ends: 17305 [2022-03-03 18:47:54,820 INFO L226 Difference]: Without dead ends: 17305 [2022-03-03 18:47:54,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 18:47:54,821 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:54,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 170 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17305 states. [2022-03-03 18:47:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17305 to 16020. [2022-03-03 18:47:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16020 states, 16019 states have (on average 3.1862787939322055) internal successors, (51041), 16019 states have internal predecessors, (51041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16020 states to 16020 states and 51041 transitions. [2022-03-03 18:47:55,210 INFO L78 Accepts]: Start accepts. Automaton has 16020 states and 51041 transitions. Word has length 24 [2022-03-03 18:47:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:55,210 INFO L470 AbstractCegarLoop]: Abstraction has 16020 states and 51041 transitions. [2022-03-03 18:47:55,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 16020 states and 51041 transitions. [2022-03-03 18:47:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:55,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:55,243 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:55,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-03-03 18:47:55,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:55,443 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash 846771407, now seen corresponding path program 382 times [2022-03-03 18:47:55,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:55,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125174739] [2022-03-03 18:47:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:55,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:55,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:55,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125174739] [2022-03-03 18:47:55,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125174739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:55,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337448223] [2022-03-03 18:47:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:47:55,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:55,512 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:55,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-03-03 18:47:55,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:47:55,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:55,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:55,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337448223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:55,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:55,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:47:55,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229233769] [2022-03-03 18:47:55,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:55,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:55,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:55,692 INFO L87 Difference]: Start difference. First operand 16020 states and 51041 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:56,309 INFO L93 Difference]: Finished difference Result 17722 states and 55602 transitions. [2022-03-03 18:47:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 18:47:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:56,362 INFO L225 Difference]: With dead ends: 17722 [2022-03-03 18:47:56,362 INFO L226 Difference]: Without dead ends: 17708 [2022-03-03 18:47:56,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 18:47:56,362 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:56,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 166 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17708 states. [2022-03-03 18:47:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17708 to 16053. [2022-03-03 18:47:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16053 states, 16052 states have (on average 3.185771243458759) internal successors, (51138), 16052 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 51138 transitions. [2022-03-03 18:47:56,802 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 51138 transitions. Word has length 24 [2022-03-03 18:47:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:56,802 INFO L470 AbstractCegarLoop]: Abstraction has 16053 states and 51138 transitions. [2022-03-03 18:47:56,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 51138 transitions. [2022-03-03 18:47:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:56,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:56,834 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:56,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-03-03 18:47:57,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:57,035 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash -909630513, now seen corresponding path program 383 times [2022-03-03 18:47:57,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:57,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980292813] [2022-03-03 18:47:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:57,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:57,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:57,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980292813] [2022-03-03 18:47:57,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980292813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:57,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651549470] [2022-03-03 18:47:57,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:47:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:57,102 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:57,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-03-03 18:47:57,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:47:57,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:57,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:57,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651549470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:57,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:57,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:47:57,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375902884] [2022-03-03 18:47:57,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:57,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:57,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:57,280 INFO L87 Difference]: Start difference. First operand 16053 states and 51138 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:57,822 INFO L93 Difference]: Finished difference Result 17524 states and 54984 transitions. [2022-03-03 18:47:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 18:47:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:57,860 INFO L225 Difference]: With dead ends: 17524 [2022-03-03 18:47:57,860 INFO L226 Difference]: Without dead ends: 17506 [2022-03-03 18:47:57,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=862, Invalid=1894, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 18:47:57,861 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:57,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 143 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2022-03-03 18:47:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 16094. [2022-03-03 18:47:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 3.1848008450879264) internal successors, (51253), 16093 states have internal predecessors, (51253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 51253 transitions. [2022-03-03 18:47:58,178 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 51253 transitions. Word has length 24 [2022-03-03 18:47:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:58,178 INFO L470 AbstractCegarLoop]: Abstraction has 16094 states and 51253 transitions. [2022-03-03 18:47:58,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 51253 transitions. [2022-03-03 18:47:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:58,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:58,203 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:58,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-03-03 18:47:58,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:58,403 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:47:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:47:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1666110671, now seen corresponding path program 384 times [2022-03-03 18:47:58,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:47:58,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509303208] [2022-03-03 18:47:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:47:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:47:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:47:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:58,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:47:58,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509303208] [2022-03-03 18:47:58,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509303208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:47:58,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304531223] [2022-03-03 18:47:58,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:47:58,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:47:58,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:47:58,468 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:47:58,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-03-03 18:47:58,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:47:58,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:47:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:47:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:47:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:58,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:47:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:47:58,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304531223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:47:58,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:47:58,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:47:58,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992470893] [2022-03-03 18:47:58,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:47:58,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:47:58,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:47:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:47:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:47:58,645 INFO L87 Difference]: Start difference. First operand 16094 states and 51253 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:47:59,426 INFO L93 Difference]: Finished difference Result 17741 states and 55478 transitions. [2022-03-03 18:47:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 18:47:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:47:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:47:59,464 INFO L225 Difference]: With dead ends: 17741 [2022-03-03 18:47:59,464 INFO L226 Difference]: Without dead ends: 17731 [2022-03-03 18:47:59,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 18:47:59,465 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:47:59,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 186 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:47:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2022-03-03 18:47:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 16203. [2022-03-03 18:47:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.1827552154055057) internal successors, (51567), 16202 states have internal predecessors, (51567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 51567 transitions. [2022-03-03 18:47:59,849 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 51567 transitions. Word has length 24 [2022-03-03 18:47:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:47:59,849 INFO L470 AbstractCegarLoop]: Abstraction has 16203 states and 51567 transitions. [2022-03-03 18:47:59,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:47:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 51567 transitions. [2022-03-03 18:47:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:47:59,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:47:59,875 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:47:59,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Ended with exit code 0 [2022-03-03 18:48:00,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-03-03 18:48:00,076 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 363725775, now seen corresponding path program 385 times [2022-03-03 18:48:00,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:00,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835097579] [2022-03-03 18:48:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:00,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:00,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835097579] [2022-03-03 18:48:00,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835097579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:00,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439530100] [2022-03-03 18:48:00,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:48:00,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:00,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:00,144 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:00,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-03-03 18:48:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:00,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:00,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:00,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439530100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:00,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:00,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:48:00,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035933131] [2022-03-03 18:48:00,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:00,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:00,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:00,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:00,326 INFO L87 Difference]: Start difference. First operand 16203 states and 51567 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:01,290 INFO L93 Difference]: Finished difference Result 18351 states and 57209 transitions. [2022-03-03 18:48:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 18:48:01,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:01,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:01,337 INFO L225 Difference]: With dead ends: 18351 [2022-03-03 18:48:01,337 INFO L226 Difference]: Without dead ends: 18347 [2022-03-03 18:48:01,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1920, Invalid=3780, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 18:48:01,338 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:01,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 218 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2022-03-03 18:48:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 16270. [2022-03-03 18:48:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16270 states, 16269 states have (on average 3.1803429835884196) internal successors, (51741), 16269 states have internal predecessors, (51741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16270 states to 16270 states and 51741 transitions. [2022-03-03 18:48:01,735 INFO L78 Accepts]: Start accepts. Automaton has 16270 states and 51741 transitions. Word has length 24 [2022-03-03 18:48:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:01,735 INFO L470 AbstractCegarLoop]: Abstraction has 16270 states and 51741 transitions. [2022-03-03 18:48:01,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 16270 states and 51741 transitions. [2022-03-03 18:48:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:01,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:01,767 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:01,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2022-03-03 18:48:01,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-03-03 18:48:01,968 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash 321713359, now seen corresponding path program 386 times [2022-03-03 18:48:01,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:01,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836165238] [2022-03-03 18:48:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:02,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:02,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836165238] [2022-03-03 18:48:02,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836165238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:02,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131813431] [2022-03-03 18:48:02,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:48:02,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:02,038 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:02,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-03-03 18:48:02,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:48:02,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:02,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:02,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131813431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:02,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:02,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:48:02,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308386928] [2022-03-03 18:48:02,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:02,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:02,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:02,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:02,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:02,224 INFO L87 Difference]: Start difference. First operand 16270 states and 51741 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:03,186 INFO L93 Difference]: Finished difference Result 18812 states and 58615 transitions. [2022-03-03 18:48:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 18:48:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:03,242 INFO L225 Difference]: With dead ends: 18812 [2022-03-03 18:48:03,242 INFO L226 Difference]: Without dead ends: 18812 [2022-03-03 18:48:03,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 18:48:03,243 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 256 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:03,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 234 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2022-03-03 18:48:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 16419. [2022-03-03 18:48:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16419 states, 16418 states have (on average 3.188451699354367) internal successors, (52348), 16418 states have internal predecessors, (52348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16419 states to 16419 states and 52348 transitions. [2022-03-03 18:48:03,717 INFO L78 Accepts]: Start accepts. Automaton has 16419 states and 52348 transitions. Word has length 24 [2022-03-03 18:48:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:03,718 INFO L470 AbstractCegarLoop]: Abstraction has 16419 states and 52348 transitions. [2022-03-03 18:48:03,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 16419 states and 52348 transitions. [2022-03-03 18:48:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:03,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:03,750 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:03,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Ended with exit code 0 [2022-03-03 18:48:03,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-03-03 18:48:03,951 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 893168165, now seen corresponding path program 387 times [2022-03-03 18:48:03,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:03,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062759500] [2022-03-03 18:48:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:03,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:04,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:04,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062759500] [2022-03-03 18:48:04,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062759500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:04,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41744669] [2022-03-03 18:48:04,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:48:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:04,023 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:04,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-03-03 18:48:04,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:48:04,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:04,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:04,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:04,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41744669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:04,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:04,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-03-03 18:48:04,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743028200] [2022-03-03 18:48:04,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:04,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:04,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:04,208 INFO L87 Difference]: Start difference. First operand 16419 states and 52348 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:05,247 INFO L93 Difference]: Finished difference Result 17894 states and 55882 transitions. [2022-03-03 18:48:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 18:48:05,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:05,300 INFO L225 Difference]: With dead ends: 17894 [2022-03-03 18:48:05,300 INFO L226 Difference]: Without dead ends: 17879 [2022-03-03 18:48:05,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 18:48:05,301 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 235 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:05,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 269 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17879 states. [2022-03-03 18:48:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17879 to 15868. [2022-03-03 18:48:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15868 states, 15867 states have (on average 3.1803743618831537) internal successors, (50463), 15867 states have internal predecessors, (50463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 50463 transitions. [2022-03-03 18:48:05,697 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 50463 transitions. Word has length 24 [2022-03-03 18:48:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:05,697 INFO L470 AbstractCegarLoop]: Abstraction has 15868 states and 50463 transitions. [2022-03-03 18:48:05,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 50463 transitions. [2022-03-03 18:48:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:05,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:05,729 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:05,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-03-03 18:48:05,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-03-03 18:48:05,929 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1428397967, now seen corresponding path program 388 times [2022-03-03 18:48:05,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:05,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973869095] [2022-03-03 18:48:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:06,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:06,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973869095] [2022-03-03 18:48:06,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973869095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:06,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995010702] [2022-03-03 18:48:06,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:48:06,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:06,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:06,004 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:06,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-03-03 18:48:06,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:48:06,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:06,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:06,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995010702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:06,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:06,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-03-03 18:48:06,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123622963] [2022-03-03 18:48:06,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:06,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:48:06,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:06,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:48:06,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:48:06,191 INFO L87 Difference]: Start difference. First operand 15868 states and 50463 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:07,182 INFO L93 Difference]: Finished difference Result 17262 states and 53968 transitions. [2022-03-03 18:48:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 18:48:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:07,233 INFO L225 Difference]: With dead ends: 17262 [2022-03-03 18:48:07,234 INFO L226 Difference]: Without dead ends: 17250 [2022-03-03 18:48:07,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 18:48:07,235 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 150 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:07,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 239 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2022-03-03 18:48:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 15928. [2022-03-03 18:48:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.1800087901048535) internal successors, (50648), 15927 states have internal predecessors, (50648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50648 transitions. [2022-03-03 18:48:07,660 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50648 transitions. Word has length 24 [2022-03-03 18:48:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:07,660 INFO L470 AbstractCegarLoop]: Abstraction has 15928 states and 50648 transitions. [2022-03-03 18:48:07,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50648 transitions. [2022-03-03 18:48:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:07,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:07,692 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:07,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-03-03 18:48:07,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:07,892 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:07,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1162494723, now seen corresponding path program 389 times [2022-03-03 18:48:07,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:07,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503479207] [2022-03-03 18:48:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:07,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:07,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:07,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503479207] [2022-03-03 18:48:07,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503479207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:07,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191795332] [2022-03-03 18:48:07,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:48:07,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:07,983 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:07,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-03-03 18:48:08,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:48:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:08,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191795332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:08,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:08,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2022-03-03 18:48:08,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249644801] [2022-03-03 18:48:08,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:08,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:48:08,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:48:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:48:08,182 INFO L87 Difference]: Start difference. First operand 15928 states and 50648 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:08,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:08,903 INFO L93 Difference]: Finished difference Result 17178 states and 53993 transitions. [2022-03-03 18:48:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:48:08,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:08,940 INFO L225 Difference]: With dead ends: 17178 [2022-03-03 18:48:08,941 INFO L226 Difference]: Without dead ends: 17178 [2022-03-03 18:48:08,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1411, Invalid=3145, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:48:08,941 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:08,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 125 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2022-03-03 18:48:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 15887. [2022-03-03 18:48:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15887 states, 15886 states have (on average 3.1804733727810652) internal successors, (50525), 15886 states have internal predecessors, (50525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 50525 transitions. [2022-03-03 18:48:09,234 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 50525 transitions. Word has length 24 [2022-03-03 18:48:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:09,234 INFO L470 AbstractCegarLoop]: Abstraction has 15887 states and 50525 transitions. [2022-03-03 18:48:09,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 50525 transitions. [2022-03-03 18:48:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:09,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:09,258 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:09,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-03-03 18:48:09,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2022-03-03 18:48:09,459 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2031019403, now seen corresponding path program 390 times [2022-03-03 18:48:09,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:09,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447774511] [2022-03-03 18:48:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:09,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:09,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447774511] [2022-03-03 18:48:09,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447774511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:09,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982873886] [2022-03-03 18:48:09,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:48:09,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:09,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:09,526 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:09,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-03-03 18:48:09,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:48:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:09,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:09,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982873886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:09,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:09,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 23 [2022-03-03 18:48:09,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649993923] [2022-03-03 18:48:09,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:09,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:48:09,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:09,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:48:09,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:48:09,723 INFO L87 Difference]: Start difference. First operand 15887 states and 50525 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:10,390 INFO L93 Difference]: Finished difference Result 17298 states and 54207 transitions. [2022-03-03 18:48:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 18:48:10,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:10,427 INFO L225 Difference]: With dead ends: 17298 [2022-03-03 18:48:10,427 INFO L226 Difference]: Without dead ends: 17284 [2022-03-03 18:48:10,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1112, Invalid=2548, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 18:48:10,428 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:10,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 134 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:10,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17284 states. [2022-03-03 18:48:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17284 to 15888. [2022-03-03 18:48:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15887 states have (on average 3.180147290237301) internal successors, (50523), 15887 states have internal predecessors, (50523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 50523 transitions. [2022-03-03 18:48:10,801 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 50523 transitions. Word has length 24 [2022-03-03 18:48:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:10,801 INFO L470 AbstractCegarLoop]: Abstraction has 15888 states and 50523 transitions. [2022-03-03 18:48:10,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 50523 transitions. [2022-03-03 18:48:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:10,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:10,827 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:10,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-03-03 18:48:11,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2022-03-03 18:48:11,028 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 812110339, now seen corresponding path program 391 times [2022-03-03 18:48:11,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:11,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465267190] [2022-03-03 18:48:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:11,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:11,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465267190] [2022-03-03 18:48:11,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465267190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:11,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319196687] [2022-03-03 18:48:11,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:48:11,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:11,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:11,090 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:11,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-03-03 18:48:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:11,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:11,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:11,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:11,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319196687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:11,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:11,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-03-03 18:48:11,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585527149] [2022-03-03 18:48:11,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:11,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:11,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:11,277 INFO L87 Difference]: Start difference. First operand 15888 states and 50523 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:11,948 INFO L93 Difference]: Finished difference Result 17783 states and 55482 transitions. [2022-03-03 18:48:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 18:48:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:11,997 INFO L225 Difference]: With dead ends: 17783 [2022-03-03 18:48:11,997 INFO L226 Difference]: Without dead ends: 17773 [2022-03-03 18:48:11,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1178, Invalid=2604, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 18:48:11,998 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:11,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 128 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17773 states. [2022-03-03 18:48:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17773 to 16003. [2022-03-03 18:48:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16003 states, 16002 states have (on average 3.1781652293463316) internal successors, (50857), 16002 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 50857 transitions. [2022-03-03 18:48:12,386 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 50857 transitions. Word has length 24 [2022-03-03 18:48:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:12,386 INFO L470 AbstractCegarLoop]: Abstraction has 16003 states and 50857 transitions. [2022-03-03 18:48:12,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 50857 transitions. [2022-03-03 18:48:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:12,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:12,418 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:12,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-03-03 18:48:12,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:12,619 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash -58493301, now seen corresponding path program 392 times [2022-03-03 18:48:12,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:12,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066413830] [2022-03-03 18:48:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:12,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066413830] [2022-03-03 18:48:12,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066413830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568351] [2022-03-03 18:48:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:48:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:12,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:12,682 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:12,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-03-03 18:48:12,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:48:12,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:12,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:12,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:12,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:12,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:12,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-03-03 18:48:12,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041426906] [2022-03-03 18:48:12,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:12,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:12,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:12,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:12,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:12,872 INFO L87 Difference]: Start difference. First operand 16003 states and 50857 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:13,622 INFO L93 Difference]: Finished difference Result 17914 states and 55910 transitions. [2022-03-03 18:48:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 18:48:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:13,675 INFO L225 Difference]: With dead ends: 17914 [2022-03-03 18:48:13,675 INFO L226 Difference]: Without dead ends: 17904 [2022-03-03 18:48:13,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 18:48:13,676 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:13,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 179 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2022-03-03 18:48:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 16144. [2022-03-03 18:48:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16144 states, 16143 states have (on average 3.1767329492659355) internal successors, (51282), 16143 states have internal predecessors, (51282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16144 states to 16144 states and 51282 transitions. [2022-03-03 18:48:14,125 INFO L78 Accepts]: Start accepts. Automaton has 16144 states and 51282 transitions. Word has length 24 [2022-03-03 18:48:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:14,125 INFO L470 AbstractCegarLoop]: Abstraction has 16144 states and 51282 transitions. [2022-03-03 18:48:14,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 16144 states and 51282 transitions. [2022-03-03 18:48:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:14,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:14,157 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:14,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2022-03-03 18:48:14,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:14,358 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash 329064707, now seen corresponding path program 393 times [2022-03-03 18:48:14,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:14,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002345693] [2022-03-03 18:48:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:14,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:14,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002345693] [2022-03-03 18:48:14,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002345693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:14,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532691490] [2022-03-03 18:48:14,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:48:14,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:14,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:14,420 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:14,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-03-03 18:48:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:48:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:14,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:14,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532691490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:14,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:14,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-03-03 18:48:14,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318463964] [2022-03-03 18:48:14,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:14,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:14,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:14,611 INFO L87 Difference]: Start difference. First operand 16144 states and 51282 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:15,551 INFO L93 Difference]: Finished difference Result 18800 states and 58404 transitions. [2022-03-03 18:48:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 18:48:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:15,607 INFO L225 Difference]: With dead ends: 18800 [2022-03-03 18:48:15,607 INFO L226 Difference]: Without dead ends: 18796 [2022-03-03 18:48:15,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1723, Invalid=3389, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:48:15,608 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:15,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 311 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2022-03-03 18:48:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 16306. [2022-03-03 18:48:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16306 states, 16305 states have (on average 3.176448942042318) internal successors, (51792), 16305 states have internal predecessors, (51792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 51792 transitions. [2022-03-03 18:48:16,008 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 51792 transitions. Word has length 24 [2022-03-03 18:48:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:16,008 INFO L470 AbstractCegarLoop]: Abstraction has 16306 states and 51792 transitions. [2022-03-03 18:48:16,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 51792 transitions. [2022-03-03 18:48:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:16,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:16,040 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:16,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-03-03 18:48:16,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2022-03-03 18:48:16,241 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1172850571, now seen corresponding path program 394 times [2022-03-03 18:48:16,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:16,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672943015] [2022-03-03 18:48:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:16,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:16,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672943015] [2022-03-03 18:48:16,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672943015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:16,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144715071] [2022-03-03 18:48:16,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:48:16,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:16,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:16,305 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:16,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-03-03 18:48:16,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:48:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:16,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:16,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144715071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:16,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:16,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-03-03 18:48:16,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726632918] [2022-03-03 18:48:16,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:16,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:16,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:16,495 INFO L87 Difference]: Start difference. First operand 16306 states and 51792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:17,419 INFO L93 Difference]: Finished difference Result 19224 states and 59687 transitions. [2022-03-03 18:48:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 18:48:17,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:17,477 INFO L225 Difference]: With dead ends: 19224 [2022-03-03 18:48:17,477 INFO L226 Difference]: Without dead ends: 19224 [2022-03-03 18:48:17,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 18:48:17,478 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 230 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:17,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 238 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2022-03-03 18:48:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 16395. [2022-03-03 18:48:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16395 states, 16394 states have (on average 3.1835427595461754) internal successors, (52191), 16394 states have internal predecessors, (52191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16395 states to 16395 states and 52191 transitions. [2022-03-03 18:48:17,923 INFO L78 Accepts]: Start accepts. Automaton has 16395 states and 52191 transitions. Word has length 24 [2022-03-03 18:48:17,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:17,923 INFO L470 AbstractCegarLoop]: Abstraction has 16395 states and 52191 transitions. [2022-03-03 18:48:17,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 16395 states and 52191 transitions. [2022-03-03 18:48:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:17,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:17,956 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:17,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-03-03 18:48:18,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:18,156 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:18,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1744305377, now seen corresponding path program 395 times [2022-03-03 18:48:18,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:18,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305680726] [2022-03-03 18:48:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:18,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:18,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:18,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305680726] [2022-03-03 18:48:18,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305680726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:18,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891953369] [2022-03-03 18:48:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:48:18,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:18,219 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:18,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-03-03 18:48:18,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:48:18,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:18,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:18,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:18,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891953369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:18,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:18,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-03-03 18:48:18,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097023067] [2022-03-03 18:48:18,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:18,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:18,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:18,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:18,408 INFO L87 Difference]: Start difference. First operand 16395 states and 52191 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:19,499 INFO L93 Difference]: Finished difference Result 18347 states and 57068 transitions. [2022-03-03 18:48:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 18:48:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:19,553 INFO L225 Difference]: With dead ends: 18347 [2022-03-03 18:48:19,553 INFO L226 Difference]: Without dead ends: 18335 [2022-03-03 18:48:19,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 18:48:19,554 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 195 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:19,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 258 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2022-03-03 18:48:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 16091. [2022-03-03 18:48:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.1781852082038533) internal successors, (51137), 16090 states have internal predecessors, (51137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 51137 transitions. [2022-03-03 18:48:19,958 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 51137 transitions. Word has length 24 [2022-03-03 18:48:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:19,958 INFO L470 AbstractCegarLoop]: Abstraction has 16091 states and 51137 transitions. [2022-03-03 18:48:19,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 51137 transitions. [2022-03-03 18:48:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:19,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:19,990 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:20,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-03-03 18:48:20,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2022-03-03 18:48:20,190 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:20,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2015432117, now seen corresponding path program 396 times [2022-03-03 18:48:20,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:20,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402005924] [2022-03-03 18:48:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:20,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:20,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402005924] [2022-03-03 18:48:20,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402005924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:20,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600689977] [2022-03-03 18:48:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:48:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:20,258 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:20,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-03-03 18:48:20,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 18:48:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:20,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:20,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600689977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:20,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:20,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 23 [2022-03-03 18:48:20,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635806776] [2022-03-03 18:48:20,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:20,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:48:20,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:48:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:48:20,446 INFO L87 Difference]: Start difference. First operand 16091 states and 51137 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:21,468 INFO L93 Difference]: Finished difference Result 18125 states and 56330 transitions. [2022-03-03 18:48:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 18:48:21,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:21,509 INFO L225 Difference]: With dead ends: 18125 [2022-03-03 18:48:21,509 INFO L226 Difference]: Without dead ends: 18101 [2022-03-03 18:48:21,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:48:21,510 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 209 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:21,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 269 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2022-03-03 18:48:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 15884. [2022-03-03 18:48:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15884 states, 15883 states have (on average 3.1798148964301456) internal successors, (50505), 15883 states have internal predecessors, (50505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 50505 transitions. [2022-03-03 18:48:21,872 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 50505 transitions. Word has length 24 [2022-03-03 18:48:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:21,872 INFO L470 AbstractCegarLoop]: Abstraction has 15884 states and 50505 transitions. [2022-03-03 18:48:21,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 50505 transitions. [2022-03-03 18:48:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:21,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:21,897 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:21,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-03-03 18:48:22,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:22,097 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1691789857, now seen corresponding path program 397 times [2022-03-03 18:48:22,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:22,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692757144] [2022-03-03 18:48:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:22,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:22,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692757144] [2022-03-03 18:48:22,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692757144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:22,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103529642] [2022-03-03 18:48:22,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:48:22,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:22,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:22,170 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:22,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-03-03 18:48:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:22,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:22,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103529642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:22,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:22,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2022-03-03 18:48:22,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948708680] [2022-03-03 18:48:22,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:22,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:48:22,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:48:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:48:22,359 INFO L87 Difference]: Start difference. First operand 15884 states and 50505 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:23,238 INFO L93 Difference]: Finished difference Result 17742 states and 55315 transitions. [2022-03-03 18:48:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 18:48:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:23,273 INFO L225 Difference]: With dead ends: 17742 [2022-03-03 18:48:23,273 INFO L226 Difference]: Without dead ends: 17724 [2022-03-03 18:48:23,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:48:23,274 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 181 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:23,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 186 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2022-03-03 18:48:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 15928. [2022-03-03 18:48:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.180322722421046) internal successors, (50653), 15927 states have internal predecessors, (50653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50653 transitions. [2022-03-03 18:48:23,564 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50653 transitions. Word has length 24 [2022-03-03 18:48:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:23,564 INFO L470 AbstractCegarLoop]: Abstraction has 15928 states and 50653 transitions. [2022-03-03 18:48:23,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50653 transitions. [2022-03-03 18:48:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:23,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:23,588 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:23,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-03-03 18:48:23,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-03-03 18:48:23,788 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:23,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1915082161, now seen corresponding path program 398 times [2022-03-03 18:48:23,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:23,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062023164] [2022-03-03 18:48:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:23,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:23,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:23,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062023164] [2022-03-03 18:48:23,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062023164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:23,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947692975] [2022-03-03 18:48:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:48:23,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:23,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:23,863 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:23,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-03-03 18:48:23,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:48:23,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:24,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:24,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947692975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:24,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:24,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-03-03 18:48:24,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950440159] [2022-03-03 18:48:24,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:24,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:48:24,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:48:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:48:24,070 INFO L87 Difference]: Start difference. First operand 15928 states and 50653 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:24,846 INFO L93 Difference]: Finished difference Result 16795 states and 52835 transitions. [2022-03-03 18:48:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 18:48:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:24,878 INFO L225 Difference]: With dead ends: 16795 [2022-03-03 18:48:24,879 INFO L226 Difference]: Without dead ends: 16795 [2022-03-03 18:48:24,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 18:48:24,880 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 106 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:24,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 172 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2022-03-03 18:48:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 15853. [2022-03-03 18:48:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15853 states, 15852 states have (on average 3.181049709815796) internal successors, (50426), 15852 states have internal predecessors, (50426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15853 states to 15853 states and 50426 transitions. [2022-03-03 18:48:25,284 INFO L78 Accepts]: Start accepts. Automaton has 15853 states and 50426 transitions. Word has length 24 [2022-03-03 18:48:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:25,285 INFO L470 AbstractCegarLoop]: Abstraction has 15853 states and 50426 transitions. [2022-03-03 18:48:25,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 15853 states and 50426 transitions. [2022-03-03 18:48:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:25,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:25,316 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:25,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-03-03 18:48:25,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:25,517 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:25,517 INFO L85 PathProgramCache]: Analyzing trace with hash 88001615, now seen corresponding path program 399 times [2022-03-03 18:48:25,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:25,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062851535] [2022-03-03 18:48:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:25,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:25,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062851535] [2022-03-03 18:48:25,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062851535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:25,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777274624] [2022-03-03 18:48:25,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:48:25,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:25,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:25,585 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-03-03 18:48:25,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:48:25,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:25,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:25,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:25,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777274624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:25,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:25,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 24 [2022-03-03 18:48:25,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836822987] [2022-03-03 18:48:25,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:25,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:48:25,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:25,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:48:25,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:48:25,805 INFO L87 Difference]: Start difference. First operand 15853 states and 50426 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:26,540 INFO L93 Difference]: Finished difference Result 16783 states and 52633 transitions. [2022-03-03 18:48:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 18:48:26,540 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:26,588 INFO L225 Difference]: With dead ends: 16783 [2022-03-03 18:48:26,588 INFO L226 Difference]: Without dead ends: 16769 [2022-03-03 18:48:26,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1254, Invalid=3036, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 18:48:26,589 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:26,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 135 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16769 states. [2022-03-03 18:48:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16769 to 15761. [2022-03-03 18:48:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15761 states, 15760 states have (on average 3.1805837563451775) internal successors, (50126), 15760 states have internal predecessors, (50126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15761 states to 15761 states and 50126 transitions. [2022-03-03 18:48:26,955 INFO L78 Accepts]: Start accepts. Automaton has 15761 states and 50126 transitions. Word has length 24 [2022-03-03 18:48:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:26,956 INFO L470 AbstractCegarLoop]: Abstraction has 15761 states and 50126 transitions. [2022-03-03 18:48:26,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 15761 states and 50126 transitions. [2022-03-03 18:48:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:26,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:26,986 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:27,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Forceful destruction successful, exit code 0 [2022-03-03 18:48:27,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2022-03-03 18:48:27,187 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1648498097, now seen corresponding path program 400 times [2022-03-03 18:48:27,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:27,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571625591] [2022-03-03 18:48:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:27,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:27,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:27,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571625591] [2022-03-03 18:48:27,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571625591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:27,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757839004] [2022-03-03 18:48:27,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:48:27,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:27,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:27,249 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:27,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-03-03 18:48:27,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:48:27,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:27,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:27,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:27,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757839004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:27,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:27,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 23 [2022-03-03 18:48:27,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22564530] [2022-03-03 18:48:27,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:27,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:48:27,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:48:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:48:27,455 INFO L87 Difference]: Start difference. First operand 15761 states and 50126 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:28,204 INFO L93 Difference]: Finished difference Result 17488 states and 54534 transitions. [2022-03-03 18:48:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:48:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:28,245 INFO L225 Difference]: With dead ends: 17488 [2022-03-03 18:48:28,245 INFO L226 Difference]: Without dead ends: 17478 [2022-03-03 18:48:28,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1312, Invalid=2978, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 18:48:28,246 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:28,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 170 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2022-03-03 18:48:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 15724. [2022-03-03 18:48:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15724 states, 15723 states have (on average 3.179800292565032) internal successors, (49996), 15723 states have internal predecessors, (49996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15724 states to 15724 states and 49996 transitions. [2022-03-03 18:48:28,630 INFO L78 Accepts]: Start accepts. Automaton has 15724 states and 49996 transitions. Word has length 24 [2022-03-03 18:48:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:28,630 INFO L470 AbstractCegarLoop]: Abstraction has 15724 states and 49996 transitions. [2022-03-03 18:48:28,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 15724 states and 49996 transitions. [2022-03-03 18:48:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:28,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:28,656 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:28,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-03-03 18:48:28,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-03-03 18:48:28,856 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1981608881, now seen corresponding path program 401 times [2022-03-03 18:48:28,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:28,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378833347] [2022-03-03 18:48:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:28,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:28,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378833347] [2022-03-03 18:48:28,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378833347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:28,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219004025] [2022-03-03 18:48:28,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:48:28,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:28,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:28,912 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:28,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-03-03 18:48:28,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:48:28,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:28,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:28,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:29,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:29,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219004025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:29,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:29,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-03-03 18:48:29,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237430390] [2022-03-03 18:48:29,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:29,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:29,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:29,108 INFO L87 Difference]: Start difference. First operand 15724 states and 49996 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:29,899 INFO L93 Difference]: Finished difference Result 19027 states and 59058 transitions. [2022-03-03 18:48:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 18:48:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:29,957 INFO L225 Difference]: With dead ends: 19027 [2022-03-03 18:48:29,958 INFO L226 Difference]: Without dead ends: 19021 [2022-03-03 18:48:29,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1353, Invalid=2807, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 18:48:29,958 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 181 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:29,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 237 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2022-03-03 18:48:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 16139. [2022-03-03 18:48:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.178584706902962) internal successors, (51296), 16138 states have internal predecessors, (51296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 51296 transitions. [2022-03-03 18:48:30,357 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 51296 transitions. Word has length 24 [2022-03-03 18:48:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:30,357 INFO L470 AbstractCegarLoop]: Abstraction has 16139 states and 51296 transitions. [2022-03-03 18:48:30,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 51296 transitions. [2022-03-03 18:48:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:30,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:30,389 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:30,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-03-03 18:48:30,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:30,589 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:30,590 INFO L85 PathProgramCache]: Analyzing trace with hash -745428401, now seen corresponding path program 402 times [2022-03-03 18:48:30,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:30,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801612053] [2022-03-03 18:48:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:30,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:30,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:30,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801612053] [2022-03-03 18:48:30,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801612053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:30,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479221031] [2022-03-03 18:48:30,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:48:30,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:30,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:30,648 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:30,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-03-03 18:48:30,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:48:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:30,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:30,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479221031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:30,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:30,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-03-03 18:48:30,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573328919] [2022-03-03 18:48:30,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:30,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:30,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:30,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:30,847 INFO L87 Difference]: Start difference. First operand 16139 states and 51296 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:31,720 INFO L93 Difference]: Finished difference Result 18678 states and 58104 transitions. [2022-03-03 18:48:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:48:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:31,776 INFO L225 Difference]: With dead ends: 18678 [2022-03-03 18:48:31,777 INFO L226 Difference]: Without dead ends: 18674 [2022-03-03 18:48:31,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1546, Invalid=3010, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:48:31,777 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 176 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:31,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 280 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18674 states. [2022-03-03 18:48:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18674 to 16227. [2022-03-03 18:48:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16227 states, 16226 states have (on average 3.1787255022802907) internal successors, (51578), 16226 states have internal predecessors, (51578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16227 states to 16227 states and 51578 transitions. [2022-03-03 18:48:32,237 INFO L78 Accepts]: Start accepts. Automaton has 16227 states and 51578 transitions. Word has length 24 [2022-03-03 18:48:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:32,237 INFO L470 AbstractCegarLoop]: Abstraction has 16227 states and 51578 transitions. [2022-03-03 18:48:32,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 16227 states and 51578 transitions. [2022-03-03 18:48:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:32,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:32,270 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:32,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-03-03 18:48:32,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2022-03-03 18:48:32,470 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1788300367, now seen corresponding path program 403 times [2022-03-03 18:48:32,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:32,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751987709] [2022-03-03 18:48:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:32,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:32,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751987709] [2022-03-03 18:48:32,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751987709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:32,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501592433] [2022-03-03 18:48:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:48:32,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:32,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:32,535 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:32,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-03-03 18:48:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:32,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:32,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:32,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501592433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:32,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:32,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-03-03 18:48:32,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613444781] [2022-03-03 18:48:32,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:32,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:32,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:32,728 INFO L87 Difference]: Start difference. First operand 16227 states and 51578 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:33,628 INFO L93 Difference]: Finished difference Result 19416 states and 60144 transitions. [2022-03-03 18:48:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 18:48:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:33,684 INFO L225 Difference]: With dead ends: 19416 [2022-03-03 18:48:33,684 INFO L226 Difference]: Without dead ends: 19416 [2022-03-03 18:48:33,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:48:33,685 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 245 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:33,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 241 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19416 states. [2022-03-03 18:48:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19416 to 16138. [2022-03-03 18:48:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16138 states, 16137 states have (on average 3.1851645287228108) internal successors, (51399), 16137 states have internal predecessors, (51399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 51399 transitions. [2022-03-03 18:48:34,074 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 51399 transitions. Word has length 24 [2022-03-03 18:48:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:34,074 INFO L470 AbstractCegarLoop]: Abstraction has 16138 states and 51399 transitions. [2022-03-03 18:48:34,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 51399 transitions. [2022-03-03 18:48:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:34,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:34,106 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:34,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-03-03 18:48:34,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:34,307 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1935212123, now seen corresponding path program 404 times [2022-03-03 18:48:34,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:34,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405346535] [2022-03-03 18:48:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:34,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:34,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:34,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405346535] [2022-03-03 18:48:34,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405346535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:34,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301682942] [2022-03-03 18:48:34,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:48:34,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:34,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:34,365 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:34,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-03-03 18:48:34,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:48:34,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:34,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:34,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301682942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:34,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:34,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-03-03 18:48:34,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948600317] [2022-03-03 18:48:34,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:34,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:34,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:34,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:34,559 INFO L87 Difference]: Start difference. First operand 16138 states and 51399 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:35,724 INFO L93 Difference]: Finished difference Result 18584 states and 57665 transitions. [2022-03-03 18:48:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 18:48:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:35,778 INFO L225 Difference]: With dead ends: 18584 [2022-03-03 18:48:35,779 INFO L226 Difference]: Without dead ends: 18575 [2022-03-03 18:48:35,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 18:48:35,780 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:35,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 246 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2022-03-03 18:48:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 16009. [2022-03-03 18:48:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 3.182408795602199) internal successors, (50944), 16008 states have internal predecessors, (50944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 50944 transitions. [2022-03-03 18:48:36,210 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 50944 transitions. Word has length 24 [2022-03-03 18:48:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:36,210 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 50944 transitions. [2022-03-03 18:48:36,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 50944 transitions. [2022-03-03 18:48:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:36,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:36,242 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:36,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-03-03 18:48:36,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:36,442 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1399982321, now seen corresponding path program 405 times [2022-03-03 18:48:36,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:36,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907094636] [2022-03-03 18:48:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:36,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:36,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907094636] [2022-03-03 18:48:36,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907094636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:36,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648483590] [2022-03-03 18:48:36,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:48:36,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:36,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:36,506 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:36,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-03-03 18:48:36,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:48:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:36,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:36,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648483590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:36,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:36,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 23 [2022-03-03 18:48:36,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059962645] [2022-03-03 18:48:36,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:36,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:48:36,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:36,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:48:36,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:48:36,707 INFO L87 Difference]: Start difference. First operand 16009 states and 50944 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:37,780 INFO L93 Difference]: Finished difference Result 18529 states and 57461 transitions. [2022-03-03 18:48:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 18:48:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:37,825 INFO L225 Difference]: With dead ends: 18529 [2022-03-03 18:48:37,825 INFO L226 Difference]: Without dead ends: 18514 [2022-03-03 18:48:37,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 18:48:37,827 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 239 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:37,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 217 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2022-03-03 18:48:38,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 15897. [2022-03-03 18:48:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 3.1817438349270257) internal successors, (50577), 15896 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 50577 transitions. [2022-03-03 18:48:38,164 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 50577 transitions. Word has length 24 [2022-03-03 18:48:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:38,164 INFO L470 AbstractCegarLoop]: Abstraction has 15897 states and 50577 transitions. [2022-03-03 18:48:38,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 50577 transitions. [2022-03-03 18:48:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:38,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:38,191 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:38,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-03-03 18:48:38,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-03-03 18:48:38,391 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1987727643, now seen corresponding path program 406 times [2022-03-03 18:48:38,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:38,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961067946] [2022-03-03 18:48:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:38,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:38,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:38,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961067946] [2022-03-03 18:48:38,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961067946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:38,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210762098] [2022-03-03 18:48:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:48:38,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:38,461 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:38,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-03-03 18:48:38,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:48:38,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:38,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:38,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:38,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210762098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:38,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:38,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 24 [2022-03-03 18:48:38,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257394677] [2022-03-03 18:48:38,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:38,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:48:38,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:48:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:48:38,669 INFO L87 Difference]: Start difference. First operand 15897 states and 50577 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:39,738 INFO L93 Difference]: Finished difference Result 18517 states and 57409 transitions. [2022-03-03 18:48:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 18:48:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:39,793 INFO L225 Difference]: With dead ends: 18517 [2022-03-03 18:48:39,793 INFO L226 Difference]: Without dead ends: 18490 [2022-03-03 18:48:39,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 18:48:39,794 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:39,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 242 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2022-03-03 18:48:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 15779. [2022-03-03 18:48:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15779 states, 15778 states have (on average 3.1827227785524146) internal successors, (50217), 15778 states have internal predecessors, (50217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 50217 transitions. [2022-03-03 18:48:40,233 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 50217 transitions. Word has length 24 [2022-03-03 18:48:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:40,233 INFO L470 AbstractCegarLoop]: Abstraction has 15779 states and 50217 transitions. [2022-03-03 18:48:40,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 50217 transitions. [2022-03-03 18:48:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:40,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:40,265 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:40,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-03-03 18:48:40,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-03-03 18:48:40,465 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1267003855, now seen corresponding path program 407 times [2022-03-03 18:48:40,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:40,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020014526] [2022-03-03 18:48:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:40,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:40,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:40,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020014526] [2022-03-03 18:48:40,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020014526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:40,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430301946] [2022-03-03 18:48:40,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:48:40,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:40,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:40,541 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:40,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-03-03 18:48:40,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:48:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:40,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430301946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:40,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:40,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-03-03 18:48:40,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658160652] [2022-03-03 18:48:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:40,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:48:40,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:40,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:48:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:48:40,751 INFO L87 Difference]: Start difference. First operand 15779 states and 50217 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:41,682 INFO L93 Difference]: Finished difference Result 18160 states and 56473 transitions. [2022-03-03 18:48:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 18:48:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:41,736 INFO L225 Difference]: With dead ends: 18160 [2022-03-03 18:48:41,736 INFO L226 Difference]: Without dead ends: 18136 [2022-03-03 18:48:41,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:48:41,737 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 174 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:41,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 190 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18136 states. [2022-03-03 18:48:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18136 to 15810. [2022-03-03 18:48:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15810 states, 15809 states have (on average 3.183123537225631) internal successors, (50322), 15809 states have internal predecessors, (50322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 50322 transitions. [2022-03-03 18:48:42,110 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 50322 transitions. Word has length 24 [2022-03-03 18:48:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:42,110 INFO L470 AbstractCegarLoop]: Abstraction has 15810 states and 50322 transitions. [2022-03-03 18:48:42,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 50322 transitions. [2022-03-03 18:48:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:42,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:42,142 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:42,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-03-03 18:48:42,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-03-03 18:48:42,342 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:42,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:42,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1464282243, now seen corresponding path program 408 times [2022-03-03 18:48:42,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:42,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93847653] [2022-03-03 18:48:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:42,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:42,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:42,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93847653] [2022-03-03 18:48:42,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93847653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:42,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478136157] [2022-03-03 18:48:42,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:48:42,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:42,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:42,421 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:42,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-03-03 18:48:42,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:48:42,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:42,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:42,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:42,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478136157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:42,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:42,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-03-03 18:48:42,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114392521] [2022-03-03 18:48:42,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:42,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:48:42,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:42,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:48:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:48:42,652 INFO L87 Difference]: Start difference. First operand 15810 states and 50322 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:43,553 INFO L93 Difference]: Finished difference Result 16413 states and 51718 transitions. [2022-03-03 18:48:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 18:48:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:43,599 INFO L225 Difference]: With dead ends: 16413 [2022-03-03 18:48:43,599 INFO L226 Difference]: Without dead ends: 16413 [2022-03-03 18:48:43,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1699, Invalid=4153, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 18:48:43,600 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 107 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:43,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 188 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2022-03-03 18:48:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 15703. [2022-03-03 18:48:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15703 states, 15702 states have (on average 3.1823971468602728) internal successors, (49970), 15702 states have internal predecessors, (49970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15703 states to 15703 states and 49970 transitions. [2022-03-03 18:48:44,006 INFO L78 Accepts]: Start accepts. Automaton has 15703 states and 49970 transitions. Word has length 24 [2022-03-03 18:48:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:44,006 INFO L470 AbstractCegarLoop]: Abstraction has 15703 states and 49970 transitions. [2022-03-03 18:48:44,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 15703 states and 49970 transitions. [2022-03-03 18:48:44,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:44,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:44,037 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:44,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Ended with exit code 0 [2022-03-03 18:48:44,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-03-03 18:48:44,237 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:44,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:44,238 INFO L85 PathProgramCache]: Analyzing trace with hash -16007669, now seen corresponding path program 409 times [2022-03-03 18:48:44,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:44,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665832768] [2022-03-03 18:48:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:44,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:44,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:44,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665832768] [2022-03-03 18:48:44,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665832768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:44,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023566310] [2022-03-03 18:48:44,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:48:44,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:44,304 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:44,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-03-03 18:48:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:44,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:44,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:44,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023566310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:44,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:44,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-03-03 18:48:44,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083076334] [2022-03-03 18:48:44,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:44,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:48:44,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:44,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:48:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:48:44,532 INFO L87 Difference]: Start difference. First operand 15703 states and 49970 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:45,382 INFO L93 Difference]: Finished difference Result 16653 states and 52172 transitions. [2022-03-03 18:48:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 18:48:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:45,430 INFO L225 Difference]: With dead ends: 16653 [2022-03-03 18:48:45,430 INFO L226 Difference]: Without dead ends: 16639 [2022-03-03 18:48:45,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1371, Invalid=3459, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:48:45,431 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:45,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 173 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16639 states. [2022-03-03 18:48:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16639 to 15440. [2022-03-03 18:48:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15440 states, 15439 states have (on average 3.1834315694021633) internal successors, (49149), 15439 states have internal predecessors, (49149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15440 states to 15440 states and 49149 transitions. [2022-03-03 18:48:45,784 INFO L78 Accepts]: Start accepts. Automaton has 15440 states and 49149 transitions. Word has length 24 [2022-03-03 18:48:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:45,784 INFO L470 AbstractCegarLoop]: Abstraction has 15440 states and 49149 transitions. [2022-03-03 18:48:45,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15440 states and 49149 transitions. [2022-03-03 18:48:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:45,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:45,814 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:45,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-03-03 18:48:46,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-03-03 18:48:46,015 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash -617948285, now seen corresponding path program 410 times [2022-03-03 18:48:46,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:46,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020856774] [2022-03-03 18:48:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:46,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:46,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:46,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020856774] [2022-03-03 18:48:46,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020856774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:46,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381972255] [2022-03-03 18:48:46,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:48:46,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:46,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:46,078 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:46,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-03-03 18:48:46,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:48:46,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:46,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:46,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381972255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:46,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:46,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 24 [2022-03-03 18:48:46,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521016555] [2022-03-03 18:48:46,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:46,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:48:46,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:48:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:48:46,297 INFO L87 Difference]: Start difference. First operand 15440 states and 49149 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:47,102 INFO L93 Difference]: Finished difference Result 17145 states and 53340 transitions. [2022-03-03 18:48:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 18:48:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:47,154 INFO L225 Difference]: With dead ends: 17145 [2022-03-03 18:48:47,154 INFO L226 Difference]: Without dead ends: 17135 [2022-03-03 18:48:47,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1349, Invalid=3207, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 18:48:47,155 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 202 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:47,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 273 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2022-03-03 18:48:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 15065. [2022-03-03 18:48:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15065 states, 15064 states have (on average 3.1838157195963888) internal successors, (47961), 15064 states have internal predecessors, (47961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 47961 transitions. [2022-03-03 18:48:47,566 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 47961 transitions. Word has length 24 [2022-03-03 18:48:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:47,566 INFO L470 AbstractCegarLoop]: Abstraction has 15065 states and 47961 transitions. [2022-03-03 18:48:47,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 47961 transitions. [2022-03-03 18:48:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:47,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:47,596 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:47,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Forceful destruction successful, exit code 0 [2022-03-03 18:48:47,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-03-03 18:48:47,796 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:47,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1468649717, now seen corresponding path program 411 times [2022-03-03 18:48:47,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:47,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736652506] [2022-03-03 18:48:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:47,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:47,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:47,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736652506] [2022-03-03 18:48:47,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736652506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:47,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943940207] [2022-03-03 18:48:47,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:48:47,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:47,853 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:47,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-03-03 18:48:47,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 18:48:47,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:47,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:47,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:48,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:48,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943940207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:48,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:48,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 23 [2022-03-03 18:48:48,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294210001] [2022-03-03 18:48:48,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:48,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:48:48,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:48:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:48:48,066 INFO L87 Difference]: Start difference. First operand 15065 states and 47961 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:48,900 INFO L93 Difference]: Finished difference Result 18361 states and 56965 transitions. [2022-03-03 18:48:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 18:48:48,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:48,954 INFO L225 Difference]: With dead ends: 18361 [2022-03-03 18:48:48,954 INFO L226 Difference]: Without dead ends: 18355 [2022-03-03 18:48:48,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1388, Invalid=3034, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 18:48:48,955 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 181 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:48,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 298 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18355 states. [2022-03-03 18:48:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18355 to 15150. [2022-03-03 18:48:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15150 states, 15149 states have (on average 3.1832464189055383) internal successors, (48223), 15149 states have internal predecessors, (48223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15150 states to 15150 states and 48223 transitions. [2022-03-03 18:48:49,332 INFO L78 Accepts]: Start accepts. Automaton has 15150 states and 48223 transitions. Word has length 24 [2022-03-03 18:48:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:49,332 INFO L470 AbstractCegarLoop]: Abstraction has 15150 states and 48223 transitions. [2022-03-03 18:48:49,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 15150 states and 48223 transitions. [2022-03-03 18:48:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:49,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:49,362 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:49,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-03-03 18:48:49,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:49,562 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash 305023619, now seen corresponding path program 412 times [2022-03-03 18:48:49,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:49,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139000508] [2022-03-03 18:48:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:49,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:49,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139000508] [2022-03-03 18:48:49,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139000508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:49,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65271926] [2022-03-03 18:48:49,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:48:49,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:49,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:49,615 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:49,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-03-03 18:48:49,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:48:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:49,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:49,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65271926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:49,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:49,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-03-03 18:48:49,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938790588] [2022-03-03 18:48:49,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:49,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:49,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:49,811 INFO L87 Difference]: Start difference. First operand 15150 states and 48223 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:50,653 INFO L93 Difference]: Finished difference Result 20262 states and 62769 transitions. [2022-03-03 18:48:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 18:48:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:50,713 INFO L225 Difference]: With dead ends: 20262 [2022-03-03 18:48:50,713 INFO L226 Difference]: Without dead ends: 20260 [2022-03-03 18:48:50,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1573, Invalid=3119, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:48:50,714 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 191 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:50,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 224 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20260 states. [2022-03-03 18:48:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20260 to 16488. [2022-03-03 18:48:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16488 states, 16487 states have (on average 3.178746891490265) internal successors, (52408), 16487 states have internal predecessors, (52408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16488 states to 16488 states and 52408 transitions. [2022-03-03 18:48:51,195 INFO L78 Accepts]: Start accepts. Automaton has 16488 states and 52408 transitions. Word has length 24 [2022-03-03 18:48:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:51,195 INFO L470 AbstractCegarLoop]: Abstraction has 16488 states and 52408 transitions. [2022-03-03 18:48:51,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 16488 states and 52408 transitions. [2022-03-03 18:48:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:51,225 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:51,225 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:51,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-03-03 18:48:51,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2022-03-03 18:48:51,426 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:51,426 INFO L85 PathProgramCache]: Analyzing trace with hash -607592437, now seen corresponding path program 413 times [2022-03-03 18:48:51,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:51,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448588530] [2022-03-03 18:48:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:51,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:51,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:51,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448588530] [2022-03-03 18:48:51,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448588530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:51,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857555675] [2022-03-03 18:48:51,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:48:51,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:51,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:51,487 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:51,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-03-03 18:48:51,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:48:51,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:51,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:51,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:51,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857555675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:51,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:51,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-03-03 18:48:51,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518402851] [2022-03-03 18:48:51,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:51,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:51,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:51,700 INFO L87 Difference]: Start difference. First operand 16488 states and 52408 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:52,542 INFO L93 Difference]: Finished difference Result 19932 states and 61591 transitions. [2022-03-03 18:48:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 18:48:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:52,602 INFO L225 Difference]: With dead ends: 19932 [2022-03-03 18:48:52,602 INFO L226 Difference]: Without dead ends: 19932 [2022-03-03 18:48:52,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:48:52,603 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:52,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 182 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2022-03-03 18:48:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 16990. [2022-03-03 18:48:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16989 states have (on average 3.183648242980752) internal successors, (54087), 16989 states have internal predecessors, (54087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 54087 transitions. [2022-03-03 18:48:53,027 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 54087 transitions. Word has length 24 [2022-03-03 18:48:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:53,027 INFO L470 AbstractCegarLoop]: Abstraction has 16990 states and 54087 transitions. [2022-03-03 18:48:53,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 54087 transitions. [2022-03-03 18:48:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:53,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:53,060 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:53,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Ended with exit code 0 [2022-03-03 18:48:53,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-03-03 18:48:53,261 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:53,261 INFO L85 PathProgramCache]: Analyzing trace with hash -36137631, now seen corresponding path program 414 times [2022-03-03 18:48:53,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:53,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119851445] [2022-03-03 18:48:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:53,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:53,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:53,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119851445] [2022-03-03 18:48:53,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119851445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:53,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391003194] [2022-03-03 18:48:53,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:48:53,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:53,315 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:53,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-03-03 18:48:53,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:48:53,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:53,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:53,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:53,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:53,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391003194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:53,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:53,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-03-03 18:48:53,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504257917] [2022-03-03 18:48:53,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:53,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:48:53,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:48:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:48:53,522 INFO L87 Difference]: Start difference. First operand 16990 states and 54087 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:54,781 INFO L93 Difference]: Finished difference Result 19753 states and 61171 transitions. [2022-03-03 18:48:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-03 18:48:54,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:54,839 INFO L225 Difference]: With dead ends: 19753 [2022-03-03 18:48:54,839 INFO L226 Difference]: Without dead ends: 19744 [2022-03-03 18:48:54,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 18:48:54,840 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 222 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:54,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 215 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2022-03-03 18:48:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 16867. [2022-03-03 18:48:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16867 states, 16866 states have (on average 3.1820230048618523) internal successors, (53668), 16866 states have internal predecessors, (53668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 53668 transitions. [2022-03-03 18:48:55,328 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 53668 transitions. Word has length 24 [2022-03-03 18:48:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:55,328 INFO L470 AbstractCegarLoop]: Abstraction has 16867 states and 53668 transitions. [2022-03-03 18:48:55,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 53668 transitions. [2022-03-03 18:48:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:55,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:55,361 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:55,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-03-03 18:48:55,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:55,562 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash 499092171, now seen corresponding path program 415 times [2022-03-03 18:48:55,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:55,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474022948] [2022-03-03 18:48:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:55,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:55,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474022948] [2022-03-03 18:48:55,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474022948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:55,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727583396] [2022-03-03 18:48:55,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:48:55,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:55,618 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:55,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-03-03 18:48:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:55,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:55,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:55,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727583396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:55,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:55,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 23 [2022-03-03 18:48:55,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337447195] [2022-03-03 18:48:55,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:55,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:48:55,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:48:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:48:55,822 INFO L87 Difference]: Start difference. First operand 16867 states and 53668 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:56,953 INFO L93 Difference]: Finished difference Result 19710 states and 61049 transitions. [2022-03-03 18:48:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 18:48:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:56,994 INFO L225 Difference]: With dead ends: 19710 [2022-03-03 18:48:56,994 INFO L226 Difference]: Without dead ends: 19698 [2022-03-03 18:48:56,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 18:48:56,995 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 235 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:56,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 202 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:48:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2022-03-03 18:48:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 16758. [2022-03-03 18:48:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16757 states have (on average 3.181476397923256) internal successors, (53312), 16757 states have internal predecessors, (53312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 53312 transitions. [2022-03-03 18:48:57,379 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 53312 transitions. Word has length 24 [2022-03-03 18:48:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:57,379 INFO L470 AbstractCegarLoop]: Abstraction has 16758 states and 53312 transitions. [2022-03-03 18:48:57,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 53312 transitions. [2022-03-03 18:48:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:57,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:57,412 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:57,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-03-03 18:48:57,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-03-03 18:48:57,612 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:57,613 INFO L85 PathProgramCache]: Analyzing trace with hash -88653151, now seen corresponding path program 416 times [2022-03-03 18:48:57,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:57,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736087841] [2022-03-03 18:48:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:57,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:57,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:57,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736087841] [2022-03-03 18:48:57,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736087841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:57,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981761264] [2022-03-03 18:48:57,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:48:57,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:57,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:57,679 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:57,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-03-03 18:48:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:48:57,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:48:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:57,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:48:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:57,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981761264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:48:57,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:48:57,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 24 [2022-03-03 18:48:57,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318054074] [2022-03-03 18:48:57,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:48:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:48:57,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:48:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:48:57,892 INFO L87 Difference]: Start difference. First operand 16758 states and 53312 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:59,083 INFO L93 Difference]: Finished difference Result 19755 states and 61167 transitions. [2022-03-03 18:48:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-03 18:48:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:48:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:59,140 INFO L225 Difference]: With dead ends: 19755 [2022-03-03 18:48:59,140 INFO L226 Difference]: Without dead ends: 19737 [2022-03-03 18:48:59,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 18:48:59,141 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 209 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:59,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 248 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:48:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2022-03-03 18:48:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 16856. [2022-03-03 18:48:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16856 states, 16855 states have (on average 3.18119252447345) internal successors, (53619), 16855 states have internal predecessors, (53619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 53619 transitions. [2022-03-03 18:48:59,555 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 53619 transitions. Word has length 24 [2022-03-03 18:48:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:59,555 INFO L470 AbstractCegarLoop]: Abstraction has 16856 states and 53619 transitions. [2022-03-03 18:48:59,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 53619 transitions. [2022-03-03 18:48:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:48:59,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:59,589 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:59,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-03-03 18:48:59,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2022-03-03 18:48:59,789 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1128888949, now seen corresponding path program 417 times [2022-03-03 18:48:59,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:59,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974929928] [2022-03-03 18:48:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:59,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:48:59,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:59,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974929928] [2022-03-03 18:48:59,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974929928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:59,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160383782] [2022-03-03 18:48:59,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:48:59,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:59,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:59,860 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:48:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-03-03 18:48:59,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:48:59,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:48:59,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:48:59,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:00,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:00,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160383782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:00,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:00,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-03-03 18:49:00,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322261795] [2022-03-03 18:49:00,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:00,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:49:00,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:49:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:49:00,076 INFO L87 Difference]: Start difference. First operand 16856 states and 53619 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:01,107 INFO L93 Difference]: Finished difference Result 20000 states and 61915 transitions. [2022-03-03 18:49:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 18:49:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:01,167 INFO L225 Difference]: With dead ends: 20000 [2022-03-03 18:49:01,167 INFO L226 Difference]: Without dead ends: 19976 [2022-03-03 18:49:01,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 18:49:01,169 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 235 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:01,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 201 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2022-03-03 18:49:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 17037. [2022-03-03 18:49:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17037 states, 17036 states have (on average 3.181908898802536) internal successors, (54207), 17036 states have internal predecessors, (54207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 54207 transitions. [2022-03-03 18:49:01,586 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 54207 transitions. Word has length 24 [2022-03-03 18:49:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:01,586 INFO L470 AbstractCegarLoop]: Abstraction has 17037 states and 54207 transitions. [2022-03-03 18:49:01,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 54207 transitions. [2022-03-03 18:49:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:01,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:01,619 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:01,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-03-03 18:49:01,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:01,819 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash 983539681, now seen corresponding path program 418 times [2022-03-03 18:49:01,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:01,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094323278] [2022-03-03 18:49:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:01,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:01,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094323278] [2022-03-03 18:49:01,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094323278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:01,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227203456] [2022-03-03 18:49:01,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:49:01,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:01,898 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:01,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-03-03 18:49:01,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:49:01,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:01,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:01,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:02,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:02,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227203456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:02,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:02,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-03-03 18:49:02,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26260074] [2022-03-03 18:49:02,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:02,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:49:02,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:02,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:49:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:49:02,125 INFO L87 Difference]: Start difference. First operand 17037 states and 54207 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:03,074 INFO L93 Difference]: Finished difference Result 19762 states and 61367 transitions. [2022-03-03 18:49:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 18:49:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:03,132 INFO L225 Difference]: With dead ends: 19762 [2022-03-03 18:49:03,132 INFO L226 Difference]: Without dead ends: 19732 [2022-03-03 18:49:03,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 18:49:03,133 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 207 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:03,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 165 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19732 states. [2022-03-03 18:49:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19732 to 17071. [2022-03-03 18:49:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 17070 states have (on average 3.1825424721734037) internal successors, (54326), 17070 states have internal predecessors, (54326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 54326 transitions. [2022-03-03 18:49:03,516 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 54326 transitions. Word has length 24 [2022-03-03 18:49:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:03,516 INFO L470 AbstractCegarLoop]: Abstraction has 17071 states and 54326 transitions. [2022-03-03 18:49:03,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 54326 transitions. [2022-03-03 18:49:03,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:03,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:03,548 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:03,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:03,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-03-03 18:49:03,748 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1149603633, now seen corresponding path program 419 times [2022-03-03 18:49:03,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:03,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324663062] [2022-03-03 18:49:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:03,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:03,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324663062] [2022-03-03 18:49:03,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324663062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:03,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751194032] [2022-03-03 18:49:03,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:49:03,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:03,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:03,830 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:03,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-03-03 18:49:03,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:49:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:03,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:04,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:04,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751194032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:04,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:04,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-03-03 18:49:04,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806777753] [2022-03-03 18:49:04,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:04,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:49:04,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:49:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:49:04,078 INFO L87 Difference]: Start difference. First operand 17071 states and 54326 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:04,998 INFO L93 Difference]: Finished difference Result 18326 states and 57555 transitions. [2022-03-03 18:49:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 18:49:04,998 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:05,053 INFO L225 Difference]: With dead ends: 18326 [2022-03-03 18:49:05,053 INFO L226 Difference]: Without dead ends: 18326 [2022-03-03 18:49:05,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1794, Invalid=4526, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 18:49:05,054 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:05,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 177 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2022-03-03 18:49:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17148. [2022-03-03 18:49:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 17147 states have (on average 3.1787484691199626) internal successors, (54506), 17147 states have internal predecessors, (54506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 54506 transitions. [2022-03-03 18:49:05,369 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 54506 transitions. Word has length 24 [2022-03-03 18:49:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:05,370 INFO L470 AbstractCegarLoop]: Abstraction has 17148 states and 54506 transitions. [2022-03-03 18:49:05,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 54506 transitions. [2022-03-03 18:49:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:05,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:05,395 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:05,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-03-03 18:49:05,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-03-03 18:49:05,596 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1054671823, now seen corresponding path program 420 times [2022-03-03 18:49:05,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:05,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118195346] [2022-03-03 18:49:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:05,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:05,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118195346] [2022-03-03 18:49:05,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118195346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:05,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481751212] [2022-03-03 18:49:05,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:49:05,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:05,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:05,664 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:05,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-03-03 18:49:05,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:49:05,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:05,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:05,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:05,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481751212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:05,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:05,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 26 [2022-03-03 18:49:05,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082783676] [2022-03-03 18:49:05,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:05,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:49:05,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:49:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:49:05,944 INFO L87 Difference]: Start difference. First operand 17148 states and 54506 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:06,757 INFO L93 Difference]: Finished difference Result 19278 states and 60184 transitions. [2022-03-03 18:49:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 18:49:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:06,798 INFO L225 Difference]: With dead ends: 19278 [2022-03-03 18:49:06,798 INFO L226 Difference]: Without dead ends: 19278 [2022-03-03 18:49:06,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1413, Invalid=3699, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 18:49:06,799 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 198 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:06,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 324 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2022-03-03 18:49:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 17371. [2022-03-03 18:49:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.1773172135866434) internal successors, (55190), 17370 states have internal predecessors, (55190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 55190 transitions. [2022-03-03 18:49:07,172 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 55190 transitions. Word has length 24 [2022-03-03 18:49:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:07,172 INFO L470 AbstractCegarLoop]: Abstraction has 17371 states and 55190 transitions. [2022-03-03 18:49:07,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 55190 transitions. [2022-03-03 18:49:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:07,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:07,206 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:07,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:07,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-03-03 18:49:07,406 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:07,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1264324815, now seen corresponding path program 421 times [2022-03-03 18:49:07,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:07,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844193446] [2022-03-03 18:49:07,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:07,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:07,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:07,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844193446] [2022-03-03 18:49:07,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844193446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:07,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188959914] [2022-03-03 18:49:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:49:07,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:07,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:07,469 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:07,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-03-03 18:49:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:07,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:07,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:07,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188959914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:07,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:07,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 25 [2022-03-03 18:49:07,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658954003] [2022-03-03 18:49:07,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:07,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:49:07,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:49:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:49:07,699 INFO L87 Difference]: Start difference. First operand 17371 states and 55190 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:08,577 INFO L93 Difference]: Finished difference Result 20178 states and 62903 transitions. [2022-03-03 18:49:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 18:49:08,578 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:08,639 INFO L225 Difference]: With dead ends: 20178 [2022-03-03 18:49:08,639 INFO L226 Difference]: Without dead ends: 20178 [2022-03-03 18:49:08,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1369, Invalid=3461, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:49:08,640 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 198 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:08,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 386 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:49:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20178 states. [2022-03-03 18:49:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20178 to 17685. [2022-03-03 18:49:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17685 states, 17684 states have (on average 3.17852295860665) internal successors, (56209), 17684 states have internal predecessors, (56209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17685 states to 17685 states and 56209 transitions. [2022-03-03 18:49:09,217 INFO L78 Accepts]: Start accepts. Automaton has 17685 states and 56209 transitions. Word has length 24 [2022-03-03 18:49:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:09,217 INFO L470 AbstractCegarLoop]: Abstraction has 17685 states and 56209 transitions. [2022-03-03 18:49:09,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 17685 states and 56209 transitions. [2022-03-03 18:49:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:09,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:09,243 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:09,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-03-03 18:49:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:09,444 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1548182479, now seen corresponding path program 422 times [2022-03-03 18:49:09,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:09,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915505096] [2022-03-03 18:49:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:09,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:09,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:09,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915505096] [2022-03-03 18:49:09,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915505096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:09,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396929001] [2022-03-03 18:49:09,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:49:09,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:09,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:09,497 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:09,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-03-03 18:49:09,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:49:09,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:09,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:09,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396929001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:09,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:09,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 24 [2022-03-03 18:49:09,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370715348] [2022-03-03 18:49:09,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:09,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:49:09,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:49:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:49:09,708 INFO L87 Difference]: Start difference. First operand 17685 states and 56209 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:10,557 INFO L93 Difference]: Finished difference Result 21110 states and 65699 transitions. [2022-03-03 18:49:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 18:49:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:10,620 INFO L225 Difference]: With dead ends: 21110 [2022-03-03 18:49:10,620 INFO L226 Difference]: Without dead ends: 21110 [2022-03-03 18:49:10,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 18:49:10,621 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:10,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 348 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:49:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21110 states. [2022-03-03 18:49:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21110 to 18003. [2022-03-03 18:49:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18003 states, 18002 states have (on average 3.180702144206199) internal successors, (57259), 18002 states have internal predecessors, (57259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18003 states to 18003 states and 57259 transitions. [2022-03-03 18:49:11,083 INFO L78 Accepts]: Start accepts. Automaton has 18003 states and 57259 transitions. Word has length 24 [2022-03-03 18:49:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:11,083 INFO L470 AbstractCegarLoop]: Abstraction has 18003 states and 57259 transitions. [2022-03-03 18:49:11,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 18003 states and 57259 transitions. [2022-03-03 18:49:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:11,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:11,119 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:11,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Ended with exit code 0 [2022-03-03 18:49:11,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-03-03 18:49:11,319 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1490702129, now seen corresponding path program 423 times [2022-03-03 18:49:11,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:11,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165802434] [2022-03-03 18:49:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:11,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:11,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165802434] [2022-03-03 18:49:11,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165802434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:11,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88566224] [2022-03-03 18:49:11,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:49:11,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:11,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:11,371 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:11,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-03-03 18:49:11,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:49:11,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:11,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:11,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88566224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:11,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:11,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 23 [2022-03-03 18:49:11,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130670517] [2022-03-03 18:49:11,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:11,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:49:11,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:49:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:49:11,587 INFO L87 Difference]: Start difference. First operand 18003 states and 57259 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:12,500 INFO L93 Difference]: Finished difference Result 22604 states and 70090 transitions. [2022-03-03 18:49:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 18:49:12,500 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:12,561 INFO L225 Difference]: With dead ends: 22604 [2022-03-03 18:49:12,561 INFO L226 Difference]: Without dead ends: 22604 [2022-03-03 18:49:12,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 18:49:12,562 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 211 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:12,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 305 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2022-03-03 18:49:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 18724. [2022-03-03 18:49:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18723 states have (on average 3.182395983549645) internal successors, (59584), 18723 states have internal predecessors, (59584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 59584 transitions. [2022-03-03 18:49:13,050 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 59584 transitions. Word has length 24 [2022-03-03 18:49:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:13,050 INFO L470 AbstractCegarLoop]: Abstraction has 18724 states and 59584 transitions. [2022-03-03 18:49:13,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 59584 transitions. [2022-03-03 18:49:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:13,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:13,087 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:13,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Ended with exit code 0 [2022-03-03 18:49:13,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-03-03 18:49:13,288 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1865825329, now seen corresponding path program 424 times [2022-03-03 18:49:13,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:13,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065523176] [2022-03-03 18:49:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:13,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:13,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065523176] [2022-03-03 18:49:13,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065523176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:13,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207105839] [2022-03-03 18:49:13,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:49:13,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:13,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:13,337 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:13,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-03-03 18:49:13,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:49:13,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:13,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:13,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:13,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:13,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207105839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:13,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:13,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-03-03 18:49:13,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041795588] [2022-03-03 18:49:13,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:13,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:49:13,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:49:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:49:13,544 INFO L87 Difference]: Start difference. First operand 18724 states and 59584 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:14,479 INFO L93 Difference]: Finished difference Result 26877 states and 83547 transitions. [2022-03-03 18:49:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 18:49:14,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:14,568 INFO L225 Difference]: With dead ends: 26877 [2022-03-03 18:49:14,568 INFO L226 Difference]: Without dead ends: 26877 [2022-03-03 18:49:14,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:49:14,569 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 241 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:14,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 315 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:49:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26877 states. [2022-03-03 18:49:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26877 to 23210. [2022-03-03 18:49:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 23209 states have (on average 3.1894092808824164) internal successors, (74023), 23209 states have internal predecessors, (74023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 74023 transitions. [2022-03-03 18:49:15,212 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 74023 transitions. Word has length 24 [2022-03-03 18:49:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:15,213 INFO L470 AbstractCegarLoop]: Abstraction has 23210 states and 74023 transitions. [2022-03-03 18:49:15,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 74023 transitions. [2022-03-03 18:49:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:15,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:15,257 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:15,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-03-03 18:49:15,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-03-03 18:49:15,458 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1294370523, now seen corresponding path program 425 times [2022-03-03 18:49:15,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:15,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910754298] [2022-03-03 18:49:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:15,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:15,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910754298] [2022-03-03 18:49:15,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910754298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:15,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868069659] [2022-03-03 18:49:15,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:49:15,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:15,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:15,507 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:15,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-03-03 18:49:15,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:49:15,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:15,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:15,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868069659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:15,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:15,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-03-03 18:49:15,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421604579] [2022-03-03 18:49:15,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:15,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:49:15,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:49:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:49:15,716 INFO L87 Difference]: Start difference. First operand 23210 states and 74023 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:17,233 INFO L93 Difference]: Finished difference Result 25835 states and 80460 transitions. [2022-03-03 18:49:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 18:49:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:17,320 INFO L225 Difference]: With dead ends: 25835 [2022-03-03 18:49:17,320 INFO L226 Difference]: Without dead ends: 25829 [2022-03-03 18:49:17,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4978 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 18:49:17,322 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 236 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:17,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 233 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:49:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25829 states. [2022-03-03 18:49:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25829 to 23125. [2022-03-03 18:49:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23125 states, 23124 states have (on average 3.187900017298045) internal successors, (73717), 23124 states have internal predecessors, (73717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23125 states to 23125 states and 73717 transitions. [2022-03-03 18:49:17,951 INFO L78 Accepts]: Start accepts. Automaton has 23125 states and 73717 transitions. Word has length 24 [2022-03-03 18:49:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:17,951 INFO L470 AbstractCegarLoop]: Abstraction has 23125 states and 73717 transitions. [2022-03-03 18:49:17,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 23125 states and 73717 transitions. [2022-03-03 18:49:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:17,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:17,995 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:18,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:18,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:18,195 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash -759140721, now seen corresponding path program 426 times [2022-03-03 18:49:18,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:18,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845919088] [2022-03-03 18:49:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:18,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:18,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:18,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845919088] [2022-03-03 18:49:18,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845919088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:18,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232842264] [2022-03-03 18:49:18,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:49:18,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:18,250 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:18,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-03-03 18:49:18,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:49:18,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:18,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:18,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232842264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:18,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:18,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 23 [2022-03-03 18:49:18,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831566284] [2022-03-03 18:49:18,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:18,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:49:18,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:49:18,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:49:18,461 INFO L87 Difference]: Start difference. First operand 23125 states and 73717 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:19,721 INFO L93 Difference]: Finished difference Result 25817 states and 80521 transitions. [2022-03-03 18:49:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-03 18:49:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:19,782 INFO L225 Difference]: With dead ends: 25817 [2022-03-03 18:49:19,782 INFO L226 Difference]: Without dead ends: 25805 [2022-03-03 18:49:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4237 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 18:49:19,784 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 227 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:19,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 239 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:49:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25805 states. [2022-03-03 18:49:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25805 to 23100. [2022-03-03 18:49:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23100 states, 23099 states have (on average 3.188536300272739) internal successors, (73652), 23099 states have internal predecessors, (73652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 73652 transitions. [2022-03-03 18:49:20,336 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 73652 transitions. Word has length 24 [2022-03-03 18:49:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:20,336 INFO L470 AbstractCegarLoop]: Abstraction has 23100 states and 73652 transitions. [2022-03-03 18:49:20,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 73652 transitions. [2022-03-03 18:49:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:20,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:20,369 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:20,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-03-03 18:49:20,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2022-03-03 18:49:20,570 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:20,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1346886043, now seen corresponding path program 427 times [2022-03-03 18:49:20,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:20,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719828267] [2022-03-03 18:49:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:20,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:20,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:20,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719828267] [2022-03-03 18:49:20,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719828267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:20,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806593126] [2022-03-03 18:49:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:49:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:20,628 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:20,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-03-03 18:49:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:20,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:20,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:20,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806593126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:20,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:20,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 24 [2022-03-03 18:49:20,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123340724] [2022-03-03 18:49:20,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:20,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:49:20,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:49:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:49:20,833 INFO L87 Difference]: Start difference. First operand 23100 states and 73652 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:21,935 INFO L93 Difference]: Finished difference Result 25937 states and 80963 transitions. [2022-03-03 18:49:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 18:49:21,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:21,994 INFO L225 Difference]: With dead ends: 25937 [2022-03-03 18:49:21,994 INFO L226 Difference]: Without dead ends: 25919 [2022-03-03 18:49:21,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 18:49:21,995 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 257 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:21,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 190 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2022-03-03 18:49:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 23155. [2022-03-03 18:49:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23155 states, 23154 states have (on average 3.18916817828453) internal successors, (73842), 23154 states have internal predecessors, (73842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 73842 transitions. [2022-03-03 18:49:22,585 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 73842 transitions. Word has length 24 [2022-03-03 18:49:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:22,585 INFO L470 AbstractCegarLoop]: Abstraction has 23155 states and 73842 transitions. [2022-03-03 18:49:22,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 73842 transitions. [2022-03-03 18:49:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:22,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:22,621 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:22,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Ended with exit code 0 [2022-03-03 18:49:22,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:22,822 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1907845455, now seen corresponding path program 428 times [2022-03-03 18:49:22,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:22,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447354119] [2022-03-03 18:49:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:22,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:22,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:22,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447354119] [2022-03-03 18:49:22,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447354119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:22,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48474628] [2022-03-03 18:49:22,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:49:22,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:22,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:22,885 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:22,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-03-03 18:49:22,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:49:22,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:23,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:23,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48474628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:23,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:23,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 25 [2022-03-03 18:49:23,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939104359] [2022-03-03 18:49:23,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:23,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:49:23,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:49:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:49:23,094 INFO L87 Difference]: Start difference. First operand 23155 states and 73842 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:24,134 INFO L93 Difference]: Finished difference Result 26264 states and 82006 transitions. [2022-03-03 18:49:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 18:49:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:24,199 INFO L225 Difference]: With dead ends: 26264 [2022-03-03 18:49:24,199 INFO L226 Difference]: Without dead ends: 26240 [2022-03-03 18:49:24,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 18:49:24,201 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 261 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:24,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 189 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2022-03-03 18:49:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23691. [2022-03-03 18:49:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23691 states, 23690 states have (on average 3.1908400168847617) internal successors, (75591), 23690 states have internal predecessors, (75591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 75591 transitions. [2022-03-03 18:49:24,744 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 75591 transitions. Word has length 24 [2022-03-03 18:49:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:24,744 INFO L470 AbstractCegarLoop]: Abstraction has 23691 states and 75591 transitions. [2022-03-03 18:49:24,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 75591 transitions. [2022-03-03 18:49:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:24,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:24,782 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:24,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Ended with exit code 0 [2022-03-03 18:49:24,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-03-03 18:49:24,982 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -274693211, now seen corresponding path program 429 times [2022-03-03 18:49:24,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:24,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316582913] [2022-03-03 18:49:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:25,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:25,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316582913] [2022-03-03 18:49:25,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316582913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:25,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78234590] [2022-03-03 18:49:25,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:49:25,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:25,053 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:25,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-03-03 18:49:25,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:49:25,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:25,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:49:25,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78234590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:25,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:25,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 26 [2022-03-03 18:49:25,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616533330] [2022-03-03 18:49:25,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:25,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:49:25,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:49:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:49:25,275 INFO L87 Difference]: Start difference. First operand 23691 states and 75591 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:26,342 INFO L93 Difference]: Finished difference Result 26956 states and 84218 transitions. [2022-03-03 18:49:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 18:49:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:26,412 INFO L225 Difference]: With dead ends: 26956 [2022-03-03 18:49:26,413 INFO L226 Difference]: Without dead ends: 26926 [2022-03-03 18:49:26,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:49:26,414 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 214 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:26,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 209 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2022-03-03 18:49:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 24343. [2022-03-03 18:49:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24343 states, 24342 states have (on average 3.1921370470791226) internal successors, (77703), 24342 states have internal predecessors, (77703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24343 states to 24343 states and 77703 transitions. [2022-03-03 18:49:26,961 INFO L78 Accepts]: Start accepts. Automaton has 24343 states and 77703 transitions. Word has length 24 [2022-03-03 18:49:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:26,961 INFO L470 AbstractCegarLoop]: Abstraction has 24343 states and 77703 transitions. [2022-03-03 18:49:26,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 24343 states and 77703 transitions. [2022-03-03 18:49:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 18:49:26,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:26,998 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:27,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Ended with exit code 0 [2022-03-03 18:49:27,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-03-03 18:49:27,199 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash 786084879, now seen corresponding path program 430 times [2022-03-03 18:49:27,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:27,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193984676] [2022-03-03 18:49:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:27,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:27,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:27,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193984676] [2022-03-03 18:49:27,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193984676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:27,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631854313] [2022-03-03 18:49:27,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:49:27,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:27,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:27,300 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:27,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-03-03 18:49:27,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:49:27,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 18:49:27,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:27,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:27,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631854313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:27,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:27,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-03-03 18:49:27,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107207367] [2022-03-03 18:49:27,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:27,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:49:27,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:27,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:49:27,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:49:27,580 INFO L87 Difference]: Start difference. First operand 24343 states and 77703 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:28,505 INFO L93 Difference]: Finished difference Result 26813 states and 84024 transitions. [2022-03-03 18:49:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 18:49:28,506 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 18:49:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:28,574 INFO L225 Difference]: With dead ends: 26813 [2022-03-03 18:49:28,574 INFO L226 Difference]: Without dead ends: 26777 [2022-03-03 18:49:28,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 18:49:28,575 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 164 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:28,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 192 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:49:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26777 states. [2022-03-03 18:49:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26777 to 24407. [2022-03-03 18:49:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 24406 states have (on average 3.1917561255428994) internal successors, (77898), 24406 states have internal predecessors, (77898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 77898 transitions. [2022-03-03 18:49:29,185 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 77898 transitions. Word has length 24 [2022-03-03 18:49:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:29,185 INFO L470 AbstractCegarLoop]: Abstraction has 24407 states and 77898 transitions. [2022-03-03 18:49:29,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 77898 transitions. [2022-03-03 18:49:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:29,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:29,223 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:29,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:29,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:29,423 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1988058889, now seen corresponding path program 431 times [2022-03-03 18:49:29,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:29,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143579842] [2022-03-03 18:49:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:29,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:29,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143579842] [2022-03-03 18:49:29,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143579842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:29,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292208091] [2022-03-03 18:49:29,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:49:29,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:29,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:29,640 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:29,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-03-03 18:49:29,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:49:29,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:29,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:29,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:30,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292208091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:30,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:30,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-03-03 18:49:30,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740241858] [2022-03-03 18:49:30,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:30,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:49:30,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:49:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:49:30,287 INFO L87 Difference]: Start difference. First operand 24407 states and 77898 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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) [2022-03-03 18:49:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:31,304 INFO L93 Difference]: Finished difference Result 24899 states and 78823 transitions. [2022-03-03 18:49:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 18:49:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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 25 [2022-03-03 18:49:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:31,363 INFO L225 Difference]: With dead ends: 24899 [2022-03-03 18:49:31,363 INFO L226 Difference]: Without dead ends: 24867 [2022-03-03 18:49:31,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:31,364 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 192 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:31,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1079 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:49:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2022-03-03 18:49:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 24479. [2022-03-03 18:49:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 3.185145845248795) internal successors, (77966), 24478 states have internal predecessors, (77966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 77966 transitions. [2022-03-03 18:49:32,046 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 77966 transitions. Word has length 25 [2022-03-03 18:49:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:32,046 INFO L470 AbstractCegarLoop]: Abstraction has 24479 states and 77966 transitions. [2022-03-03 18:49:32,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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) [2022-03-03 18:49:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 77966 transitions. [2022-03-03 18:49:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:32,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:32,087 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:32,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-03-03 18:49:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-03-03 18:49:32,288 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 421650923, now seen corresponding path program 432 times [2022-03-03 18:49:32,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:32,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496661279] [2022-03-03 18:49:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:32,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:32,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:32,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496661279] [2022-03-03 18:49:32,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496661279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:32,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344434245] [2022-03-03 18:49:32,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:49:32,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:32,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:32,488 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:32,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-03-03 18:49:32,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:49:32,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:32,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:33,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344434245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:33,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:33,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-03-03 18:49:33,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134909879] [2022-03-03 18:49:33,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:33,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:49:33,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:49:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:49:33,249 INFO L87 Difference]: Start difference. First operand 24479 states and 77966 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 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) [2022-03-03 18:49:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:34,156 INFO L93 Difference]: Finished difference Result 25039 states and 79187 transitions. [2022-03-03 18:49:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:49:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 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 25 [2022-03-03 18:49:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:34,242 INFO L225 Difference]: With dead ends: 25039 [2022-03-03 18:49:34,242 INFO L226 Difference]: Without dead ends: 25032 [2022-03-03 18:49:34,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:49:34,243 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 174 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:34,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1317 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:49:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25032 states. [2022-03-03 18:49:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25032 to 24640. [2022-03-03 18:49:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24640 states, 24639 states have (on average 3.186979991071066) internal successors, (78524), 24639 states have internal predecessors, (78524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24640 states to 24640 states and 78524 transitions. [2022-03-03 18:49:34,907 INFO L78 Accepts]: Start accepts. Automaton has 24640 states and 78524 transitions. Word has length 25 [2022-03-03 18:49:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:34,907 INFO L470 AbstractCegarLoop]: Abstraction has 24640 states and 78524 transitions. [2022-03-03 18:49:34,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 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) [2022-03-03 18:49:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24640 states and 78524 transitions. [2022-03-03 18:49:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:34,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:34,955 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:34,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:35,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2022-03-03 18:49:35,156 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2036353647, now seen corresponding path program 433 times [2022-03-03 18:49:35,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:35,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890288666] [2022-03-03 18:49:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:35,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:35,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:35,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890288666] [2022-03-03 18:49:35,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890288666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:35,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807119608] [2022-03-03 18:49:35,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:49:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:35,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:35,347 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:35,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-03-03 18:49:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:35,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:35,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:35,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:36,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807119608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:36,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:36,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-03-03 18:49:36,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982902205] [2022-03-03 18:49:36,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:36,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:49:36,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:36,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:49:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:49:36,174 INFO L87 Difference]: Start difference. First operand 24640 states and 78524 transitions. Second operand has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-03-03 18:49:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:36,970 INFO L93 Difference]: Finished difference Result 25025 states and 79167 transitions. [2022-03-03 18:49:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:49:36,971 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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 25 [2022-03-03 18:49:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:37,056 INFO L225 Difference]: With dead ends: 25025 [2022-03-03 18:49:37,056 INFO L226 Difference]: Without dead ends: 25009 [2022-03-03 18:49:37,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:49:37,057 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 218 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:37,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 993 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:49:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25009 states. [2022-03-03 18:49:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25009 to 24488. [2022-03-03 18:49:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-03-03 18:49:37,663 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-03-03 18:49:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:37,663 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-03-03 18:49:37,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-03-03 18:49:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-03-03 18:49:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:37,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:37,710 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:37,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Ended with exit code 0 [2022-03-03 18:49:37,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-03-03 18:49:37,911 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 993105729, now seen corresponding path program 434 times [2022-03-03 18:49:37,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:37,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522775726] [2022-03-03 18:49:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:38,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:38,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522775726] [2022-03-03 18:49:38,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522775726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:38,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881011851] [2022-03-03 18:49:38,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:49:38,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:38,103 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:38,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-03-03 18:49:38,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:49:38,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:38,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:38,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881011851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:38,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:38,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-03-03 18:49:38,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17891921] [2022-03-03 18:49:38,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:38,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:49:38,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:38,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:49:38,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:49:38,896 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 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) [2022-03-03 18:49:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:39,813 INFO L93 Difference]: Finished difference Result 24884 states and 78643 transitions. [2022-03-03 18:49:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:49:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 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 25 [2022-03-03 18:49:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:39,897 INFO L225 Difference]: With dead ends: 24884 [2022-03-03 18:49:39,898 INFO L226 Difference]: Without dead ends: 24877 [2022-03-03 18:49:39,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1358, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:39,898 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 215 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:39,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1196 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:49:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2022-03-03 18:49:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 24488. [2022-03-03 18:49:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-03-03 18:49:40,592 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-03-03 18:49:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:40,593 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-03-03 18:49:40,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 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) [2022-03-03 18:49:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-03-03 18:49:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:40,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:40,643 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:40,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Ended with exit code 0 [2022-03-03 18:49:40,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:40,844 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1528335531, now seen corresponding path program 435 times [2022-03-03 18:49:40,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:40,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862560099] [2022-03-03 18:49:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:40,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:41,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:41,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862560099] [2022-03-03 18:49:41,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862560099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:41,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352922538] [2022-03-03 18:49:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:49:41,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:41,051 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:41,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-03-03 18:49:41,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:49:41,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:41,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:41,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352922538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:41,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:41,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-03-03 18:49:41,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807001343] [2022-03-03 18:49:41,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:41,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:49:41,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:49:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:49:41,801 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 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) [2022-03-03 18:49:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:42,556 INFO L93 Difference]: Finished difference Result 24901 states and 78668 transitions. [2022-03-03 18:49:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:49:42,556 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 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 25 [2022-03-03 18:49:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:42,639 INFO L225 Difference]: With dead ends: 24901 [2022-03-03 18:49:42,639 INFO L226 Difference]: Without dead ends: 24894 [2022-03-03 18:49:42,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:42,639 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 276 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:42,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 885 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:49:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2022-03-03 18:49:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 24488. [2022-03-03 18:49:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-03-03 18:49:43,459 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-03-03 18:49:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:43,459 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-03-03 18:49:43,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 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) [2022-03-03 18:49:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-03-03 18:49:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:43,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:43,507 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:43,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-03-03 18:49:43,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:43,711 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash 940590209, now seen corresponding path program 436 times [2022-03-03 18:49:43,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:43,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861418362] [2022-03-03 18:49:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:43,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:43,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:43,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861418362] [2022-03-03 18:49:43,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861418362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:43,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600440631] [2022-03-03 18:49:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:49:43,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:43,916 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:43,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-03-03 18:49:43,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:49:43,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:44,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:44,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600440631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:44,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:44,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-03-03 18:49:44,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681636729] [2022-03-03 18:49:44,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:44,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:49:44,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:49:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:49:44,644 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:45,523 INFO L93 Difference]: Finished difference Result 24921 states and 78698 transitions. [2022-03-03 18:49:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:49:45,523 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:49:45,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:45,607 INFO L225 Difference]: With dead ends: 24921 [2022-03-03 18:49:45,608 INFO L226 Difference]: Without dead ends: 24914 [2022-03-03 18:49:45,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:45,608 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 214 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:45,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 941 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:49:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2022-03-03 18:49:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 24488. [2022-03-03 18:49:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-03-03 18:49:46,443 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-03-03 18:49:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:46,443 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-03-03 18:49:46,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-03-03 18:49:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:46,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:46,491 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:46,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Ended with exit code 0 [2022-03-03 18:49:46,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2022-03-03 18:49:46,691 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:46,692 INFO L85 PathProgramCache]: Analyzing trace with hash -99645589, now seen corresponding path program 437 times [2022-03-03 18:49:46,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:46,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652203224] [2022-03-03 18:49:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:46,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:46,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:46,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652203224] [2022-03-03 18:49:46,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652203224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:46,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424315352] [2022-03-03 18:49:46,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:49:46,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:46,928 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:46,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-03-03 18:49:46,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:49:46,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:46,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:47,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:47,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424315352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:47,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:47,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-03-03 18:49:47,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069393676] [2022-03-03 18:49:47,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:47,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:49:47,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:49:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:49:47,739 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:48,717 INFO L93 Difference]: Finished difference Result 24944 states and 78733 transitions. [2022-03-03 18:49:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:49:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:49:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:48,808 INFO L225 Difference]: With dead ends: 24944 [2022-03-03 18:49:48,808 INFO L226 Difference]: Without dead ends: 24937 [2022-03-03 18:49:48,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:48,809 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 233 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:48,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 984 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:49:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24937 states. [2022-03-03 18:49:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 24488. [2022-03-03 18:49:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-03-03 18:49:49,434 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-03-03 18:49:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:49,434 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-03-03 18:49:49,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-03-03 18:49:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:49,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:49,482 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:49,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-03-03 18:49:49,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:49,683 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2012783041, now seen corresponding path program 438 times [2022-03-03 18:49:49,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:49,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627117233] [2022-03-03 18:49:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:49,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:49,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:49,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627117233] [2022-03-03 18:49:49,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627117233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:49,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35662331] [2022-03-03 18:49:49,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:49:49,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:49,902 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:49,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-03-03 18:49:49,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:49:49,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:49,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:50,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:50,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35662331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:50,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:50,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2022-03-03 18:49:50,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633050597] [2022-03-03 18:49:50,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:50,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:49:50,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:49:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:49:50,600 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:51,640 INFO L93 Difference]: Finished difference Result 24802 states and 78491 transitions. [2022-03-03 18:49:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 18:49:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:49:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:51,724 INFO L225 Difference]: With dead ends: 24802 [2022-03-03 18:49:51,725 INFO L226 Difference]: Without dead ends: 24795 [2022-03-03 18:49:51,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:51,725 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 149 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:51,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1069 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:49:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24795 states. [2022-03-03 18:49:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24795 to 24488. [2022-03-03 18:49:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-03-03 18:49:52,486 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-03-03 18:49:52,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:52,486 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-03-03 18:49:52,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-03-03 18:49:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:52,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:52,533 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:52,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-03-03 18:49:52,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:52,734 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1055569447, now seen corresponding path program 439 times [2022-03-03 18:49:52,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:52,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470819580] [2022-03-03 18:49:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:52,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:52,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:52,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470819580] [2022-03-03 18:49:52,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470819580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:52,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735589634] [2022-03-03 18:49:52,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:49:52,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:52,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:52,954 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:52,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-03-03 18:49:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:52,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:53,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:53,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735589634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:53,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:53,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 36 [2022-03-03 18:49:53,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432648494] [2022-03-03 18:49:53,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:53,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:49:53,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:49:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:49:53,787 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:54,371 INFO L93 Difference]: Finished difference Result 25074 states and 79435 transitions. [2022-03-03 18:49:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:49:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:49:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:54,456 INFO L225 Difference]: With dead ends: 25074 [2022-03-03 18:49:54,456 INFO L226 Difference]: Without dead ends: 25067 [2022-03-03 18:49:54,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:54,456 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 207 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:54,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 719 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:49:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25067 states. [2022-03-03 18:49:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25067 to 24661. [2022-03-03 18:49:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1872668288726684) internal successors, (78598), 24660 states have internal predecessors, (78598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78598 transitions. [2022-03-03 18:49:55,219 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78598 transitions. Word has length 25 [2022-03-03 18:49:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 24661 states and 78598 transitions. [2022-03-03 18:49:55,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78598 transitions. [2022-03-03 18:49:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:55,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:55,265 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:55,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-03-03 18:49:55,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:55,465 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1624695125, now seen corresponding path program 440 times [2022-03-03 18:49:55,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:55,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139949659] [2022-03-03 18:49:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:55,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:55,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:55,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139949659] [2022-03-03 18:49:55,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139949659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:55,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735495125] [2022-03-03 18:49:55,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:49:55,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:55,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:55,660 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:55,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-03-03 18:49:55,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:49:55,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:55,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:56,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735495125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:56,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:56,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 35 [2022-03-03 18:49:56,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690566871] [2022-03-03 18:49:56,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:56,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:49:56,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:49:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:49:56,473 INFO L87 Difference]: Start difference. First operand 24661 states and 78598 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:57,116 INFO L93 Difference]: Finished difference Result 25075 states and 79432 transitions. [2022-03-03 18:49:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:49:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:49:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:57,200 INFO L225 Difference]: With dead ends: 25075 [2022-03-03 18:49:57,200 INFO L226 Difference]: Without dead ends: 25066 [2022-03-03 18:49:57,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:49:57,201 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 184 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:57,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 808 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:49:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25066 states. [2022-03-03 18:49:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25066 to 24661. [2022-03-03 18:49:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2022-03-03 18:49:57,890 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2022-03-03 18:49:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:57,890 INFO L470 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2022-03-03 18:49:57,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2022-03-03 18:49:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:49:57,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:57,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:57,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:58,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2022-03-03 18:49:58,124 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash 590978343, now seen corresponding path program 441 times [2022-03-03 18:49:58,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:58,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355335830] [2022-03-03 18:49:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:58,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:58,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355335830] [2022-03-03 18:49:58,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355335830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:58,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762300773] [2022-03-03 18:49:58,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:49:58,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:58,308 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:49:58,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-03-03 18:49:58,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:49:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:49:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:58,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:59,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762300773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:59,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:59,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-03-03 18:49:59,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207566116] [2022-03-03 18:49:59,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:59,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:49:59,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:49:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:49:59,100 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:59,767 INFO L93 Difference]: Finished difference Result 24947 states and 79111 transitions. [2022-03-03 18:49:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:49:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:49:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:59,845 INFO L225 Difference]: With dead ends: 24947 [2022-03-03 18:49:59,845 INFO L226 Difference]: Without dead ends: 24940 [2022-03-03 18:49:59,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:49:59,846 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 145 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:59,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 899 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:49:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2022-03-03 18:50:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 24661. [2022-03-03 18:50:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2022-03-03 18:50:00,572 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2022-03-03 18:50:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:00,572 INFO L470 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2022-03-03 18:50:00,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2022-03-03 18:50:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:00,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:00,620 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:00,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-03-03 18:50:00,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-03-03 18:50:00,820 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash -767792789, now seen corresponding path program 442 times [2022-03-03 18:50:00,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:00,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718413639] [2022-03-03 18:50:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:00,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:01,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:01,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718413639] [2022-03-03 18:50:01,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718413639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:01,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924982184] [2022-03-03 18:50:01,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:50:01,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:01,008 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:01,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-03-03 18:50:01,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:50:01,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:01,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:01,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924982184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:01,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:01,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 36 [2022-03-03 18:50:01,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839005852] [2022-03-03 18:50:01,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:01,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:50:01,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:01,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:50:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:50:01,834 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:02,724 INFO L93 Difference]: Finished difference Result 25694 states and 81409 transitions. [2022-03-03 18:50:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:50:02,725 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:02,815 INFO L225 Difference]: With dead ends: 25694 [2022-03-03 18:50:02,816 INFO L226 Difference]: Without dead ends: 25677 [2022-03-03 18:50:02,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:50:02,816 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 248 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:02,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 964 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:50:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2022-03-03 18:50:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 25073. [2022-03-03 18:50:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 3.1924058710912573) internal successors, (80040), 25072 states have internal predecessors, (80040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 80040 transitions. [2022-03-03 18:50:03,469 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 80040 transitions. Word has length 25 [2022-03-03 18:50:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:03,469 INFO L470 AbstractCegarLoop]: Abstraction has 25073 states and 80040 transitions. [2022-03-03 18:50:03,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 80040 transitions. [2022-03-03 18:50:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:03,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:03,509 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:03,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-03-03 18:50:03,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-03-03 18:50:03,710 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash 846909935, now seen corresponding path program 443 times [2022-03-03 18:50:03,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:03,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901742479] [2022-03-03 18:50:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:03,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:03,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:03,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901742479] [2022-03-03 18:50:03,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901742479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:03,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610885841] [2022-03-03 18:50:03,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:50:03,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:03,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:03,888 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:03,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-03-03 18:50:03,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 18:50:03,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:04,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:04,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610885841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:04,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:04,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 35 [2022-03-03 18:50:04,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620828485] [2022-03-03 18:50:04,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:04,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:50:04,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:50:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:50:04,659 INFO L87 Difference]: Start difference. First operand 25073 states and 80040 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:05,391 INFO L93 Difference]: Finished difference Result 25700 states and 81360 transitions. [2022-03-03 18:50:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:50:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:05,459 INFO L225 Difference]: With dead ends: 25700 [2022-03-03 18:50:05,459 INFO L226 Difference]: Without dead ends: 25682 [2022-03-03 18:50:05,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:05,459 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 235 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:05,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 879 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:50:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2022-03-03 18:50:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24970. [2022-03-03 18:50:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24970 states, 24969 states have (on average 3.1887140053666547) internal successors, (79619), 24969 states have internal predecessors, (79619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24970 states to 24970 states and 79619 transitions. [2022-03-03 18:50:06,040 INFO L78 Accepts]: Start accepts. Automaton has 24970 states and 79619 transitions. Word has length 25 [2022-03-03 18:50:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 24970 states and 79619 transitions. [2022-03-03 18:50:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 24970 states and 79619 transitions. [2022-03-03 18:50:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:06,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:06,088 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:06,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-03-03 18:50:06,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:06,289 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:06,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1232383893, now seen corresponding path program 444 times [2022-03-03 18:50:06,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:06,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555169058] [2022-03-03 18:50:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:06,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:06,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:06,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555169058] [2022-03-03 18:50:06,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555169058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:06,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414582332] [2022-03-03 18:50:06,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:50:06,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:06,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:06,476 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:06,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-03-03 18:50:06,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 18:50:06,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:06,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:06,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:06,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:07,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414582332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:07,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:07,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 34 [2022-03-03 18:50:07,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696179791] [2022-03-03 18:50:07,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:07,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:50:07,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:50:07,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:50:07,275 INFO L87 Difference]: Start difference. First operand 24970 states and 79619 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:08,075 INFO L93 Difference]: Finished difference Result 25480 states and 80657 transitions. [2022-03-03 18:50:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:50:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:08,139 INFO L225 Difference]: With dead ends: 25480 [2022-03-03 18:50:08,140 INFO L226 Difference]: Without dead ends: 25458 [2022-03-03 18:50:08,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:08,140 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 211 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:08,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1010 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2022-03-03 18:50:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24939. [2022-03-03 18:50:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2022-03-03 18:50:08,695 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2022-03-03 18:50:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:08,695 INFO L470 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2022-03-03 18:50:08,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2022-03-03 18:50:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:08,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:08,732 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:08,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-03-03 18:50:08,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2022-03-03 18:50:08,933 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:08,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1265983121, now seen corresponding path program 445 times [2022-03-03 18:50:08,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:08,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784773922] [2022-03-03 18:50:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:08,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:09,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:09,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784773922] [2022-03-03 18:50:09,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784773922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:09,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713160017] [2022-03-03 18:50:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:50:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:09,124 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:09,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-03-03 18:50:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:09,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:09,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713160017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:09,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:09,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-03-03 18:50:09,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539779751] [2022-03-03 18:50:09,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:09,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:50:09,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:09,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:50:09,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:50:09,962 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:10,635 INFO L93 Difference]: Finished difference Result 25309 states and 80217 transitions. [2022-03-03 18:50:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:50:10,635 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:10,698 INFO L225 Difference]: With dead ends: 25309 [2022-03-03 18:50:10,698 INFO L226 Difference]: Without dead ends: 25302 [2022-03-03 18:50:10,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:50:10,698 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 219 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:10,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 777 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:50:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25302 states. [2022-03-03 18:50:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25302 to 24939. [2022-03-03 18:50:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2022-03-03 18:50:11,238 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2022-03-03 18:50:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:11,238 INFO L470 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2022-03-03 18:50:11,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2022-03-03 18:50:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:11,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:11,275 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:11,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Ended with exit code 0 [2022-03-03 18:50:11,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2022-03-03 18:50:11,475 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:11,475 INFO L85 PathProgramCache]: Analyzing trace with hash -238350399, now seen corresponding path program 446 times [2022-03-03 18:50:11,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:11,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055492441] [2022-03-03 18:50:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:11,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:11,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055492441] [2022-03-03 18:50:11,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055492441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:11,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715625986] [2022-03-03 18:50:11,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:50:11,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:11,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:11,663 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:11,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-03-03 18:50:11,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:50:11,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:11,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:11,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:50:11,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:12,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715625986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:12,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:12,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-03-03 18:50:12,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061632729] [2022-03-03 18:50:12,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:12,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:50:12,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:50:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:50:12,444 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:13,071 INFO L93 Difference]: Finished difference Result 25226 states and 80018 transitions. [2022-03-03 18:50:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:50:13,072 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:13,136 INFO L225 Difference]: With dead ends: 25226 [2022-03-03 18:50:13,136 INFO L226 Difference]: Without dead ends: 25213 [2022-03-03 18:50:13,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:50:13,137 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 137 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:13,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 848 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:50:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2022-03-03 18:50:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 24914. [2022-03-03 18:50:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24914 states, 24913 states have (on average 3.1877333119255007) internal successors, (79416), 24913 states have internal predecessors, (79416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 79416 transitions. [2022-03-03 18:50:13,871 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 79416 transitions. Word has length 25 [2022-03-03 18:50:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:13,871 INFO L470 AbstractCegarLoop]: Abstraction has 24914 states and 79416 transitions. [2022-03-03 18:50:13,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 79416 transitions. [2022-03-03 18:50:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:13,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:13,910 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:13,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-03-03 18:50:14,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-03-03 18:50:14,111 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1457447257, now seen corresponding path program 447 times [2022-03-03 18:50:14,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:14,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228990607] [2022-03-03 18:50:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:14,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:14,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228990607] [2022-03-03 18:50:14,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228990607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:14,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161222652] [2022-03-03 18:50:14,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:50:14,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:14,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:14,300 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:14,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-03-03 18:50:14,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 18:50:14,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:14,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:15,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161222652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:15,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:15,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 36 [2022-03-03 18:50:15,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658397651] [2022-03-03 18:50:15,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:15,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:50:15,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:50:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:50:15,096 INFO L87 Difference]: Start difference. First operand 24914 states and 79416 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:15,816 INFO L93 Difference]: Finished difference Result 26019 states and 82469 transitions. [2022-03-03 18:50:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:50:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:15,883 INFO L225 Difference]: With dead ends: 26019 [2022-03-03 18:50:15,884 INFO L226 Difference]: Without dead ends: 26002 [2022-03-03 18:50:15,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:50:15,884 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 250 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:15,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 996 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:50:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2022-03-03 18:50:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 25397. [2022-03-03 18:50:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25397 states, 25396 states have (on average 3.193416286029296) internal successors, (81100), 25396 states have internal predecessors, (81100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25397 states to 25397 states and 81100 transitions. [2022-03-03 18:50:16,633 INFO L78 Accepts]: Start accepts. Automaton has 25397 states and 81100 transitions. Word has length 25 [2022-03-03 18:50:16,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:16,633 INFO L470 AbstractCegarLoop]: Abstraction has 25397 states and 81100 transitions. [2022-03-03 18:50:16,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 25397 states and 81100 transitions. [2022-03-03 18:50:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:16,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:16,671 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:16,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-03-03 18:50:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:16,871 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 157255467, now seen corresponding path program 448 times [2022-03-03 18:50:16,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:16,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382125206] [2022-03-03 18:50:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:16,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:17,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:17,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382125206] [2022-03-03 18:50:17,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382125206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:17,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108304224] [2022-03-03 18:50:17,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:50:17,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:17,051 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:17,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-03-03 18:50:17,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:50:17,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:17,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:17,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:17,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108304224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:17,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:17,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 35 [2022-03-03 18:50:17,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017373899] [2022-03-03 18:50:17,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:17,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:50:17,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:50:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:50:17,812 INFO L87 Difference]: Start difference. First operand 25397 states and 81100 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:18,620 INFO L93 Difference]: Finished difference Result 26023 states and 82394 transitions. [2022-03-03 18:50:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:50:18,620 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:18,687 INFO L225 Difference]: With dead ends: 26023 [2022-03-03 18:50:18,687 INFO L226 Difference]: Without dead ends: 26005 [2022-03-03 18:50:18,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:18,688 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 177 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:18,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1245 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2022-03-03 18:50:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 25282. [2022-03-03 18:50:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25282 states, 25281 states have (on average 3.189628574819034) internal successors, (80637), 25281 states have internal predecessors, (80637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 80637 transitions. [2022-03-03 18:50:19,328 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 80637 transitions. Word has length 25 [2022-03-03 18:50:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:19,328 INFO L470 AbstractCegarLoop]: Abstraction has 25282 states and 80637 transitions. [2022-03-03 18:50:19,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 80637 transitions. [2022-03-03 18:50:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:19,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:19,366 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:19,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-03-03 18:50:19,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:19,566 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1922038361, now seen corresponding path program 449 times [2022-03-03 18:50:19,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:19,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880026594] [2022-03-03 18:50:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:19,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:19,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880026594] [2022-03-03 18:50:19,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880026594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:19,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656828334] [2022-03-03 18:50:19,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:50:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:19,754 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:19,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-03-03 18:50:19,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 18:50:19,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:19,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:20,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:20,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656828334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:20,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:20,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 34 [2022-03-03 18:50:20,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687346878] [2022-03-03 18:50:20,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:50:20,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:50:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:50:20,564 INFO L87 Difference]: Start difference. First operand 25282 states and 80637 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:21,349 INFO L93 Difference]: Finished difference Result 25873 states and 81826 transitions. [2022-03-03 18:50:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:50:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:21,437 INFO L225 Difference]: With dead ends: 25873 [2022-03-03 18:50:21,437 INFO L226 Difference]: Without dead ends: 25851 [2022-03-03 18:50:21,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:21,437 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 195 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:21,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 943 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:50:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25851 states. [2022-03-03 18:50:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25851 to 25224. [2022-03-03 18:50:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25224 states, 25223 states have (on average 3.1875669032232485) internal successors, (80400), 25223 states have internal predecessors, (80400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25224 states to 25224 states and 80400 transitions. [2022-03-03 18:50:22,209 INFO L78 Accepts]: Start accepts. Automaton has 25224 states and 80400 transitions. Word has length 25 [2022-03-03 18:50:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:22,209 INFO L470 AbstractCegarLoop]: Abstraction has 25224 states and 80400 transitions. [2022-03-03 18:50:22,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 25224 states and 80400 transitions. [2022-03-03 18:50:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:22,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:22,257 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:22,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Ended with exit code 0 [2022-03-03 18:50:22,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:22,458 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:22,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1955637589, now seen corresponding path program 450 times [2022-03-03 18:50:22,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:22,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842945635] [2022-03-03 18:50:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:22,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:22,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:22,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842945635] [2022-03-03 18:50:22,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842945635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:22,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799768979] [2022-03-03 18:50:22,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:50:22,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:22,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:22,655 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:22,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-03-03 18:50:22,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 18:50:22,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:22,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:22,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:23,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799768979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:23,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:23,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-03-03 18:50:23,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293733856] [2022-03-03 18:50:23,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:23,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:50:23,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:50:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:50:23,418 INFO L87 Difference]: Start difference. First operand 25224 states and 80400 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:24,377 INFO L93 Difference]: Finished difference Result 25707 states and 81351 transitions. [2022-03-03 18:50:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:50:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:24,615 INFO L225 Difference]: With dead ends: 25707 [2022-03-03 18:50:24,616 INFO L226 Difference]: Without dead ends: 25681 [2022-03-03 18:50:24,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:24,616 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 185 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:24,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1121 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:50:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2022-03-03 18:50:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 25191. [2022-03-03 18:50:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2022-03-03 18:50:25,208 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2022-03-03 18:50:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:25,208 INFO L470 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2022-03-03 18:50:25,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2022-03-03 18:50:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:25,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:25,256 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:25,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Ended with exit code 0 [2022-03-03 18:50:25,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-03-03 18:50:25,456 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:25,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1297753639, now seen corresponding path program 451 times [2022-03-03 18:50:25,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:25,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266037634] [2022-03-03 18:50:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:25,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:25,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266037634] [2022-03-03 18:50:25,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266037634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:25,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835405435] [2022-03-03 18:50:25,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:50:25,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:25,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:25,744 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:25,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-03-03 18:50:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835405435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:26,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:26,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-03-03 18:50:26,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793715248] [2022-03-03 18:50:26,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:26,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:50:26,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:50:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:50:26,520 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 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) [2022-03-03 18:50:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:27,438 INFO L93 Difference]: Finished difference Result 25528 states and 80917 transitions. [2022-03-03 18:50:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:50:27,439 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 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 25 [2022-03-03 18:50:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:27,496 INFO L225 Difference]: With dead ends: 25528 [2022-03-03 18:50:27,496 INFO L226 Difference]: Without dead ends: 25521 [2022-03-03 18:50:27,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:50:27,497 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 174 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:27,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1008 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2022-03-03 18:50:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25191. [2022-03-03 18:50:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2022-03-03 18:50:28,019 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2022-03-03 18:50:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:28,019 INFO L470 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2022-03-03 18:50:28,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 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) [2022-03-03 18:50:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2022-03-03 18:50:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:28,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:28,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:28,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Ended with exit code 0 [2022-03-03 18:50:28,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-03-03 18:50:28,264 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -42206587, now seen corresponding path program 452 times [2022-03-03 18:50:28,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:28,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953202974] [2022-03-03 18:50:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:28,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:28,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:28,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953202974] [2022-03-03 18:50:28,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953202974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:28,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367806370] [2022-03-03 18:50:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:50:28,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:28,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:28,445 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-03-03 18:50:28,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:50:28,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:28,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:50:28,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:29,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367806370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:29,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:29,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-03-03 18:50:29,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005299525] [2022-03-03 18:50:29,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:29,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:50:29,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:50:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:50:29,306 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:29,818 INFO L93 Difference]: Finished difference Result 25433 states and 80707 transitions. [2022-03-03 18:50:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:50:29,819 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:29,876 INFO L225 Difference]: With dead ends: 25433 [2022-03-03 18:50:29,876 INFO L226 Difference]: Without dead ends: 25420 [2022-03-03 18:50:29,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:50:29,876 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 218 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:29,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 630 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:50:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2022-03-03 18:50:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25149. [2022-03-03 18:50:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25149 states, 25148 states have (on average 3.185819945920153) internal successors, (80117), 25148 states have internal predecessors, (80117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 80117 transitions. [2022-03-03 18:50:30,407 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 80117 transitions. Word has length 25 [2022-03-03 18:50:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:30,407 INFO L470 AbstractCegarLoop]: Abstraction has 25149 states and 80117 transitions. [2022-03-03 18:50:30,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 80117 transitions. [2022-03-03 18:50:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:30,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:30,443 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:30,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:30,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-03-03 18:50:30,644 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1361899285, now seen corresponding path program 453 times [2022-03-03 18:50:30,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:30,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312765516] [2022-03-03 18:50:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:30,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:30,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312765516] [2022-03-03 18:50:30,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312765516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:30,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730703129] [2022-03-03 18:50:30,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:50:30,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:30,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:30,828 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:30,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-03-03 18:50:30,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:50:30,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:30,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:31,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:31,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730703129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:31,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:31,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 36 [2022-03-03 18:50:31,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316177720] [2022-03-03 18:50:31,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:31,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:50:31,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:50:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:50:31,587 INFO L87 Difference]: Start difference. First operand 25149 states and 80117 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:32,467 INFO L93 Difference]: Finished difference Result 26300 states and 83236 transitions. [2022-03-03 18:50:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:50:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:32,533 INFO L225 Difference]: With dead ends: 26300 [2022-03-03 18:50:32,534 INFO L226 Difference]: Without dead ends: 26283 [2022-03-03 18:50:32,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:50:32,534 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 177 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:32,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1372 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2022-03-03 18:50:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 25645. [2022-03-03 18:50:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.1899469661519264) internal successors, (81803), 25644 states have internal predecessors, (81803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81803 transitions. [2022-03-03 18:50:33,141 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81803 transitions. Word has length 25 [2022-03-03 18:50:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:33,142 INFO L470 AbstractCegarLoop]: Abstraction has 25645 states and 81803 transitions. [2022-03-03 18:50:33,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81803 transitions. [2022-03-03 18:50:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:33,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:33,186 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:33,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Ended with exit code 0 [2022-03-03 18:50:33,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-03-03 18:50:33,387 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 252803439, now seen corresponding path program 454 times [2022-03-03 18:50:33,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:33,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373929746] [2022-03-03 18:50:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:33,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:33,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:33,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373929746] [2022-03-03 18:50:33,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373929746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:33,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052528770] [2022-03-03 18:50:33,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:50:33,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:33,562 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:33,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-03-03 18:50:33,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:50:33,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:33,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:33,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:34,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052528770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:34,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:34,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 35 [2022-03-03 18:50:34,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985939842] [2022-03-03 18:50:34,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:34,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:50:34,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:34,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:50:34,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:50:34,315 INFO L87 Difference]: Start difference. First operand 25645 states and 81803 transitions. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:35,121 INFO L93 Difference]: Finished difference Result 26302 states and 83129 transitions. [2022-03-03 18:50:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:50:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:35,182 INFO L225 Difference]: With dead ends: 26302 [2022-03-03 18:50:35,183 INFO L226 Difference]: Without dead ends: 26284 [2022-03-03 18:50:35,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:35,183 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 200 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:35,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1301 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:35,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26284 states. [2022-03-03 18:50:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26284 to 25519. [2022-03-03 18:50:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25519 states, 25518 states have (on average 3.186966063171095) internal successors, (81325), 25518 states have internal predecessors, (81325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 81325 transitions. [2022-03-03 18:50:35,828 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 81325 transitions. Word has length 25 [2022-03-03 18:50:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:35,828 INFO L470 AbstractCegarLoop]: Abstraction has 25519 states and 81325 transitions. [2022-03-03 18:50:35,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 81325 transitions. [2022-03-03 18:50:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:35,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:35,875 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:35,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-03-03 18:50:36,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2022-03-03 18:50:36,076 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1826490389, now seen corresponding path program 455 times [2022-03-03 18:50:36,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:36,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112730959] [2022-03-03 18:50:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:36,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:36,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112730959] [2022-03-03 18:50:36,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112730959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:36,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883442807] [2022-03-03 18:50:36,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:50:36,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:36,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:36,258 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:36,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-03-03 18:50:36,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:50:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:36,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:36,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:37,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883442807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:37,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:37,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 34 [2022-03-03 18:50:37,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175264393] [2022-03-03 18:50:37,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:37,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:50:37,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:50:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:50:37,006 INFO L87 Difference]: Start difference. First operand 25519 states and 81325 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:37,845 INFO L93 Difference]: Finished difference Result 26169 states and 82620 transitions. [2022-03-03 18:50:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:50:37,845 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:37,908 INFO L225 Difference]: With dead ends: 26169 [2022-03-03 18:50:37,908 INFO L226 Difference]: Without dead ends: 26147 [2022-03-03 18:50:37,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:37,908 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 189 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:37,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1165 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2022-03-03 18:50:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 25469. [2022-03-03 18:50:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25468 states have (on average 3.1853698759227265) internal successors, (81125), 25468 states have internal predecessors, (81125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 81125 transitions. [2022-03-03 18:50:38,534 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 81125 transitions. Word has length 25 [2022-03-03 18:50:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:38,534 INFO L470 AbstractCegarLoop]: Abstraction has 25469 states and 81125 transitions. [2022-03-03 18:50:38,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 81125 transitions. [2022-03-03 18:50:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:38,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:38,571 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:38,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:38,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2022-03-03 18:50:38,772 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1860089617, now seen corresponding path program 456 times [2022-03-03 18:50:38,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:38,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033297230] [2022-03-03 18:50:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:38,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:38,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033297230] [2022-03-03 18:50:38,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033297230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:38,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023048143] [2022-03-03 18:50:38,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:50:38,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:38,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:38,958 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:38,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-03-03 18:50:38,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 18:50:38,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:38,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:39,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:39,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023048143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:39,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:39,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 33 [2022-03-03 18:50:39,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821742057] [2022-03-03 18:50:39,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:39,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:50:39,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:50:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:50:39,685 INFO L87 Difference]: Start difference. First operand 25469 states and 81125 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:50:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:40,603 INFO L93 Difference]: Finished difference Result 26109 states and 82367 transitions. [2022-03-03 18:50:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:50:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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 25 [2022-03-03 18:50:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:40,673 INFO L225 Difference]: With dead ends: 26109 [2022-03-03 18:50:40,673 INFO L226 Difference]: Without dead ends: 26083 [2022-03-03 18:50:40,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:40,674 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 182 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:40,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1204 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2022-03-03 18:50:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25423. [2022-03-03 18:50:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25423 states, 25422 states have (on average 3.1845645503894264) internal successors, (80958), 25422 states have internal predecessors, (80958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25423 states to 25423 states and 80958 transitions. [2022-03-03 18:50:41,301 INFO L78 Accepts]: Start accepts. Automaton has 25423 states and 80958 transitions. Word has length 25 [2022-03-03 18:50:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:41,301 INFO L470 AbstractCegarLoop]: Abstraction has 25423 states and 80958 transitions. [2022-03-03 18:50:41,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:50:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 25423 states and 80958 transitions. [2022-03-03 18:50:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:41,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:41,339 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:41,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Ended with exit code 0 [2022-03-03 18:50:41,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2022-03-03 18:50:41,540 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1393301611, now seen corresponding path program 457 times [2022-03-03 18:50:41,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:41,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908022798] [2022-03-03 18:50:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:41,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:41,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908022798] [2022-03-03 18:50:41,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908022798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:41,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008153199] [2022-03-03 18:50:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:50:41,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:41,732 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-03-03 18:50:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:42,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:42,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008153199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:42,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:42,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-03-03 18:50:42,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519509566] [2022-03-03 18:50:42,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:42,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:50:42,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:50:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:50:42,434 INFO L87 Difference]: Start difference. First operand 25423 states and 80958 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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) [2022-03-03 18:50:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:43,242 INFO L93 Difference]: Finished difference Result 25930 states and 81933 transitions. [2022-03-03 18:50:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:50:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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 25 [2022-03-03 18:50:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:43,303 INFO L225 Difference]: With dead ends: 25930 [2022-03-03 18:50:43,303 INFO L226 Difference]: Without dead ends: 25900 [2022-03-03 18:50:43,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:43,304 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 218 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:43,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 856 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:50:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2022-03-03 18:50:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25388. [2022-03-03 18:50:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2022-03-03 18:50:43,996 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2022-03-03 18:50:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:43,997 INFO L470 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2022-03-03 18:50:43,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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) [2022-03-03 18:50:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2022-03-03 18:50:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:44,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:44,038 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:44,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:44,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:44,239 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:44,239 INFO L85 PathProgramCache]: Analyzing trace with hash -830785425, now seen corresponding path program 458 times [2022-03-03 18:50:44,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:44,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601677182] [2022-03-03 18:50:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:44,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:44,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:44,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601677182] [2022-03-03 18:50:44,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601677182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:44,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774103306] [2022-03-03 18:50:44,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:50:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:44,436 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:44,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-03-03 18:50:44,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:50:44,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:44,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:44,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:45,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774103306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:45,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:45,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2022-03-03 18:50:45,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616078917] [2022-03-03 18:50:45,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:45,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:50:45,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:50:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:50:45,118 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:46,008 INFO L93 Difference]: Finished difference Result 25727 states and 81464 transitions. [2022-03-03 18:50:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:50:46,009 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:46,064 INFO L225 Difference]: With dead ends: 25727 [2022-03-03 18:50:46,064 INFO L226 Difference]: Without dead ends: 25720 [2022-03-03 18:50:46,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:50:46,064 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 168 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:46,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1037 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2022-03-03 18:50:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 25388. [2022-03-03 18:50:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2022-03-03 18:50:46,710 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2022-03-03 18:50:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:46,710 INFO L470 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2022-03-03 18:50:46,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2022-03-03 18:50:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:46,751 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:46,751 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:46,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-03-03 18:50:46,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:46,951 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1743284289, now seen corresponding path program 459 times [2022-03-03 18:50:46,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:46,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997638275] [2022-03-03 18:50:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:46,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:47,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:47,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997638275] [2022-03-03 18:50:47,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997638275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:47,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991826884] [2022-03-03 18:50:47,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:50:47,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:47,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:47,133 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:47,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-03-03 18:50:47,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:50:47,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:47,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:50:47,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:47,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991826884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:47,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:47,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-03-03 18:50:47,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922758642] [2022-03-03 18:50:47,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:47,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:50:47,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:50:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:50:47,921 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:48,523 INFO L93 Difference]: Finished difference Result 25601 states and 81204 transitions. [2022-03-03 18:50:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:50:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:48,579 INFO L225 Difference]: With dead ends: 25601 [2022-03-03 18:50:48,580 INFO L226 Difference]: Without dead ends: 25588 [2022-03-03 18:50:48,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:50:48,580 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 171 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:48,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 785 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:50:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25588 states. [2022-03-03 18:50:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25588 to 25330. [2022-03-03 18:50:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25330 states, 25329 states have (on average 3.1820837774882547) internal successors, (80599), 25329 states have internal predecessors, (80599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25330 states to 25330 states and 80599 transitions. [2022-03-03 18:50:49,218 INFO L78 Accepts]: Start accepts. Automaton has 25330 states and 80599 transitions. Word has length 25 [2022-03-03 18:50:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:49,218 INFO L470 AbstractCegarLoop]: Abstraction has 25330 states and 80599 transitions. [2022-03-03 18:50:49,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25330 states and 80599 transitions. [2022-03-03 18:50:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:49,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:49,256 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:49,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Ended with exit code 0 [2022-03-03 18:50:49,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:49,456 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1600087847, now seen corresponding path program 460 times [2022-03-03 18:50:49,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:49,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685518025] [2022-03-03 18:50:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:49,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:49,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685518025] [2022-03-03 18:50:49,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685518025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:49,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836710873] [2022-03-03 18:50:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:50:49,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:49,637 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:49,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-03-03 18:50:49,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:50:49,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:49,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:49,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:50,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836710873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:50,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:50,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 36 [2022-03-03 18:50:50,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130419260] [2022-03-03 18:50:50,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:50,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:50:50,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:50,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:50:50,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:50:50,375 INFO L87 Difference]: Start difference. First operand 25330 states and 80599 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:51,177 INFO L93 Difference]: Finished difference Result 26240 states and 82962 transitions. [2022-03-03 18:50:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:50:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:51,238 INFO L225 Difference]: With dead ends: 26240 [2022-03-03 18:50:51,238 INFO L226 Difference]: Without dead ends: 26223 [2022-03-03 18:50:51,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:50:51,238 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 203 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:51,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1263 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26223 states. [2022-03-03 18:50:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26223 to 25777. [2022-03-03 18:50:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 25776 states have (on average 3.1840083798882683) internal successors, (82071), 25776 states have internal predecessors, (82071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 82071 transitions. [2022-03-03 18:50:51,884 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 82071 transitions. Word has length 25 [2022-03-03 18:50:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:51,884 INFO L470 AbstractCegarLoop]: Abstraction has 25777 states and 82071 transitions. [2022-03-03 18:50:51,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 82071 transitions. [2022-03-03 18:50:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:51,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:51,926 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:51,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-03-03 18:50:52,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:52,126 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1080176725, now seen corresponding path program 461 times [2022-03-03 18:50:52,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:52,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576888057] [2022-03-03 18:50:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:52,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:52,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576888057] [2022-03-03 18:50:52,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576888057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:52,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086440410] [2022-03-03 18:50:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:50:52,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:52,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:52,303 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:52,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-03-03 18:50:52,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:50:52,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:52,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:53,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086440410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:53,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:53,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 35 [2022-03-03 18:50:53,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649795180] [2022-03-03 18:50:53,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:53,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:50:53,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:50:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:50:53,022 INFO L87 Difference]: Start difference. First operand 25777 states and 82071 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:53,853 INFO L93 Difference]: Finished difference Result 26238 states and 82828 transitions. [2022-03-03 18:50:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:50:53,854 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:50:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:53,921 INFO L225 Difference]: With dead ends: 26238 [2022-03-03 18:50:53,921 INFO L226 Difference]: Without dead ends: 26220 [2022-03-03 18:50:53,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:53,922 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 227 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:53,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1341 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:50:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2022-03-03 18:50:54,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25645. [2022-03-03 18:50:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.181913897987833) internal successors, (81597), 25644 states have internal predecessors, (81597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81597 transitions. [2022-03-03 18:50:54,643 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81597 transitions. Word has length 25 [2022-03-03 18:50:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:54,643 INFO L470 AbstractCegarLoop]: Abstraction has 25645 states and 81597 transitions. [2022-03-03 18:50:54,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81597 transitions. [2022-03-03 18:50:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:54,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:54,686 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:54,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-03-03 18:50:54,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-03-03 18:50:54,886 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1135496743, now seen corresponding path program 462 times [2022-03-03 18:50:54,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:54,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307943460] [2022-03-03 18:50:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:55,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:55,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307943460] [2022-03-03 18:50:55,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307943460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:55,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342001711] [2022-03-03 18:50:55,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:50:55,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:55,072 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:55,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-03-03 18:50:55,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:50:55,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:55,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:55,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342001711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:55,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:55,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 34 [2022-03-03 18:50:55,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295466528] [2022-03-03 18:50:55,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:55,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:50:55,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:50:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:50:55,841 INFO L87 Difference]: Start difference. First operand 25645 states and 81597 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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) [2022-03-03 18:50:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:56,807 INFO L93 Difference]: Finished difference Result 26128 states and 82385 transitions. [2022-03-03 18:50:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:50:56,807 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 25 [2022-03-03 18:50:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:56,896 INFO L225 Difference]: With dead ends: 26128 [2022-03-03 18:50:56,896 INFO L226 Difference]: Without dead ends: 26106 [2022-03-03 18:50:56,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:56,897 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 194 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:56,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1359 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:50:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26106 states. [2022-03-03 18:50:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26106 to 25607. [2022-03-03 18:50:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25607 states, 25606 states have (on average 3.180465515894712) internal successors, (81439), 25606 states have internal predecessors, (81439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25607 states to 25607 states and 81439 transitions. [2022-03-03 18:50:57,633 INFO L78 Accepts]: Start accepts. Automaton has 25607 states and 81439 transitions. Word has length 25 [2022-03-03 18:50:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:57,633 INFO L470 AbstractCegarLoop]: Abstraction has 25607 states and 81439 transitions. [2022-03-03 18:50:57,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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) [2022-03-03 18:50:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 25607 states and 81439 transitions. [2022-03-03 18:50:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:50:57,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:57,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:57,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Ended with exit code 0 [2022-03-03 18:50:57,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:57,888 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:57,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1101897515, now seen corresponding path program 463 times [2022-03-03 18:50:57,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:57,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116810750] [2022-03-03 18:50:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:57,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:58,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:58,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116810750] [2022-03-03 18:50:58,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116810750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:58,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169032496] [2022-03-03 18:50:58,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:50:58,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:58,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:58,082 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:50:58,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-03-03 18:50:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:50:58,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:58,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:58,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169032496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:58,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:58,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2022-03-03 18:50:58,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735016065] [2022-03-03 18:50:58,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:58,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:50:58,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:50:58,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:50:58,836 INFO L87 Difference]: Start difference. First operand 25607 states and 81439 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-03-03 18:50:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:59,813 INFO L93 Difference]: Finished difference Result 26123 states and 82279 transitions. [2022-03-03 18:50:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:50:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 25 [2022-03-03 18:50:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:59,902 INFO L225 Difference]: With dead ends: 26123 [2022-03-03 18:50:59,902 INFO L226 Difference]: Without dead ends: 26097 [2022-03-03 18:50:59,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:50:59,902 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 213 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:59,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1084 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:50:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26097 states. [2022-03-03 18:51:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26097 to 25568. [2022-03-03 18:51:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25568 states, 25567 states have (on average 3.179645636953886) internal successors, (81294), 25567 states have internal predecessors, (81294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 81294 transitions. [2022-03-03 18:51:00,560 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 81294 transitions. Word has length 25 [2022-03-03 18:51:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:00,560 INFO L470 AbstractCegarLoop]: Abstraction has 25568 states and 81294 transitions. [2022-03-03 18:51:00,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-03-03 18:51:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 81294 transitions. [2022-03-03 18:51:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:00,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:00,604 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:00,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Ended with exit code 0 [2022-03-03 18:51:00,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2022-03-03 18:51:00,804 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash 60321447, now seen corresponding path program 464 times [2022-03-03 18:51:00,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:00,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664097272] [2022-03-03 18:51:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:00,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:00,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:00,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664097272] [2022-03-03 18:51:00,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664097272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:00,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602627122] [2022-03-03 18:51:00,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:51:00,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:00,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:00,998 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:00,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-03-03 18:51:01,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:51:01,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:01,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:01,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:01,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:01,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602627122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:01,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:01,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 32 [2022-03-03 18:51:01,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672390905] [2022-03-03 18:51:01,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:01,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:51:01,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:01,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:51:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:51:01,702 INFO L87 Difference]: Start difference. First operand 25568 states and 81294 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:02,759 INFO L93 Difference]: Finished difference Result 26123 states and 82191 transitions. [2022-03-03 18:51:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:51:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:02,825 INFO L225 Difference]: With dead ends: 26123 [2022-03-03 18:51:02,825 INFO L226 Difference]: Without dead ends: 26093 [2022-03-03 18:51:02,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:02,825 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 199 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:02,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1220 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 18:51:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26093 states. [2022-03-03 18:51:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26093 to 25530. [2022-03-03 18:51:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25530 states, 25529 states have (on average 3.179286301852795) internal successors, (81164), 25529 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25530 states to 25530 states and 81164 transitions. [2022-03-03 18:51:03,389 INFO L78 Accepts]: Start accepts. Automaton has 25530 states and 81164 transitions. Word has length 25 [2022-03-03 18:51:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:03,389 INFO L470 AbstractCegarLoop]: Abstraction has 25530 states and 81164 transitions. [2022-03-03 18:51:03,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 25530 states and 81164 transitions. [2022-03-03 18:51:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:03,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:03,432 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:03,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Ended with exit code 0 [2022-03-03 18:51:03,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-03-03 18:51:03,632 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2131201707, now seen corresponding path program 465 times [2022-03-03 18:51:03,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:03,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483498325] [2022-03-03 18:51:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:03,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:03,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483498325] [2022-03-03 18:51:03,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483498325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:03,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982399357] [2022-03-03 18:51:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:51:03,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:03,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:03,827 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:03,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-03-03 18:51:03,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:51:03,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:04,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:04,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982399357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:04,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:04,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2022-03-03 18:51:04,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563908845] [2022-03-03 18:51:04,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:51:04,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:51:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:51:04,477 INFO L87 Difference]: Start difference. First operand 25530 states and 81164 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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) [2022-03-03 18:51:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:05,402 INFO L93 Difference]: Finished difference Result 25971 states and 81876 transitions. [2022-03-03 18:51:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:51:05,402 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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 25 [2022-03-03 18:51:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:05,461 INFO L225 Difference]: With dead ends: 25971 [2022-03-03 18:51:05,462 INFO L226 Difference]: Without dead ends: 25937 [2022-03-03 18:51:05,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:05,462 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 214 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:05,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 967 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:51:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25937 states. [2022-03-03 18:51:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25937 to 25500. [2022-03-03 18:51:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 25499 states have (on average 3.179379583513079) internal successors, (81071), 25499 states have internal predecessors, (81071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 81071 transitions. [2022-03-03 18:51:05,987 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 81071 transitions. Word has length 25 [2022-03-03 18:51:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:05,987 INFO L470 AbstractCegarLoop]: Abstraction has 25500 states and 81071 transitions. [2022-03-03 18:51:05,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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) [2022-03-03 18:51:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 81071 transitions. [2022-03-03 18:51:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:06,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:06,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:06,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Ended with exit code 0 [2022-03-03 18:51:06,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:06,229 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1903980327, now seen corresponding path program 466 times [2022-03-03 18:51:06,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:06,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146277283] [2022-03-03 18:51:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:06,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:06,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146277283] [2022-03-03 18:51:06,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146277283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:06,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911475989] [2022-03-03 18:51:06,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:51:06,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:06,436 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:06,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-03-03 18:51:06,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:51:06,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:06,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:06,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:07,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911475989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:07,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:07,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 30 [2022-03-03 18:51:07,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010844054] [2022-03-03 18:51:07,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:07,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:51:07,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:07,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:51:07,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:51:07,078 INFO L87 Difference]: Start difference. First operand 25500 states and 81071 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:51:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:08,084 INFO L93 Difference]: Finished difference Result 25807 states and 81556 transitions. [2022-03-03 18:51:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:51:08,085 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 25 [2022-03-03 18:51:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:08,145 INFO L225 Difference]: With dead ends: 25807 [2022-03-03 18:51:08,145 INFO L226 Difference]: Without dead ends: 25800 [2022-03-03 18:51:08,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:51:08,145 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 173 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:08,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 964 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:51:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25800 states. [2022-03-03 18:51:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25800 to 25502. [2022-03-03 18:51:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25501 states have (on average 3.1792478726324456) internal successors, (81074), 25501 states have internal predecessors, (81074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 81074 transitions. [2022-03-03 18:51:08,685 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 81074 transitions. Word has length 25 [2022-03-03 18:51:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:08,685 INFO L470 AbstractCegarLoop]: Abstraction has 25502 states and 81074 transitions. [2022-03-03 18:51:08,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-03-03 18:51:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 81074 transitions. [2022-03-03 18:51:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:08,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:08,725 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:08,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-03-03 18:51:08,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2022-03-03 18:51:08,926 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1258926597, now seen corresponding path program 467 times [2022-03-03 18:51:08,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:08,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433703303] [2022-03-03 18:51:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:09,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:09,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433703303] [2022-03-03 18:51:09,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433703303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:09,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109124849] [2022-03-03 18:51:09,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:51:09,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:09,105 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:09,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-03-03 18:51:09,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:51:09,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:51:09,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:09,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109124849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:09,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:09,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-03-03 18:51:09,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311142826] [2022-03-03 18:51:09,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:09,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:51:09,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:51:09,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:51:09,887 INFO L87 Difference]: Start difference. First operand 25502 states and 81074 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:10,427 INFO L93 Difference]: Finished difference Result 25654 states and 81322 transitions. [2022-03-03 18:51:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:51:10,427 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:51:10,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:10,503 INFO L225 Difference]: With dead ends: 25654 [2022-03-03 18:51:10,503 INFO L226 Difference]: Without dead ends: 25641 [2022-03-03 18:51:10,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:51:10,504 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 200 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:10,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 653 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:51:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25641 states. [2022-03-03 18:51:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25641 to 25457. [2022-03-03 18:51:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25457 states, 25456 states have (on average 3.179525455688246) internal successors, (80938), 25456 states have internal predecessors, (80938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 80938 transitions. [2022-03-03 18:51:11,095 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 80938 transitions. Word has length 25 [2022-03-03 18:51:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:11,095 INFO L470 AbstractCegarLoop]: Abstraction has 25457 states and 80938 transitions. [2022-03-03 18:51:11,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 80938 transitions. [2022-03-03 18:51:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:11,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:11,137 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:11,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Ended with exit code 0 [2022-03-03 18:51:11,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:11,337 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1067591573, now seen corresponding path program 468 times [2022-03-03 18:51:11,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:11,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358666178] [2022-03-03 18:51:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:11,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:11,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358666178] [2022-03-03 18:51:11,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358666178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:11,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795858768] [2022-03-03 18:51:11,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:51:11,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:11,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:11,532 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:11,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-03-03 18:51:11,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:51:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:11,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:12,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795858768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:12,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:12,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-03-03 18:51:12,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915027176] [2022-03-03 18:51:12,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:12,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:51:12,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:51:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:51:12,292 INFO L87 Difference]: Start difference. First operand 25457 states and 80938 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 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) [2022-03-03 18:51:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:13,168 INFO L93 Difference]: Finished difference Result 26445 states and 83499 transitions. [2022-03-03 18:51:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:51:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 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 25 [2022-03-03 18:51:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:13,259 INFO L225 Difference]: With dead ends: 26445 [2022-03-03 18:51:13,260 INFO L226 Difference]: Without dead ends: 26428 [2022-03-03 18:51:13,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 18:51:13,260 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 202 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:13,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1346 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:51:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2022-03-03 18:51:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26047. [2022-03-03 18:51:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.1769177608845887) internal successors, (82746), 26046 states have internal predecessors, (82746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 82746 transitions. [2022-03-03 18:51:13,984 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 82746 transitions. Word has length 25 [2022-03-03 18:51:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:13,984 INFO L470 AbstractCegarLoop]: Abstraction has 26047 states and 82746 transitions. [2022-03-03 18:51:13,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 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) [2022-03-03 18:51:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 82746 transitions. [2022-03-03 18:51:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:14,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:14,031 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:14,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-03-03 18:51:14,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:14,232 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 547111151, now seen corresponding path program 469 times [2022-03-03 18:51:14,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:14,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423397339] [2022-03-03 18:51:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:14,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:14,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:14,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423397339] [2022-03-03 18:51:14,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423397339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:14,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958358589] [2022-03-03 18:51:14,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:51:14,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:14,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:14,425 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:14,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-03-03 18:51:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:14,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:15,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958358589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:15,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:15,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-03-03 18:51:15,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388299339] [2022-03-03 18:51:15,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:51:15,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:51:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:51:15,156 INFO L87 Difference]: Start difference. First operand 26047 states and 82746 transitions. Second operand has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-03-03 18:51:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:16,077 INFO L93 Difference]: Finished difference Result 26443 states and 83380 transitions. [2022-03-03 18:51:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:51:16,077 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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 25 [2022-03-03 18:51:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:16,138 INFO L225 Difference]: With dead ends: 26443 [2022-03-03 18:51:16,139 INFO L226 Difference]: Without dead ends: 26427 [2022-03-03 18:51:16,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:16,139 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 1954 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:16,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1619 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1954 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:51:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26427 states. [2022-03-03 18:51:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26427 to 26006. [2022-03-03 18:51:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26006 states, 26005 states have (on average 3.173658911747741) internal successors, (82531), 26005 states have internal predecessors, (82531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26006 states to 26006 states and 82531 transitions. [2022-03-03 18:51:16,827 INFO L78 Accepts]: Start accepts. Automaton has 26006 states and 82531 transitions. Word has length 25 [2022-03-03 18:51:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:16,827 INFO L470 AbstractCegarLoop]: Abstraction has 26006 states and 82531 transitions. [2022-03-03 18:51:16,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-03-03 18:51:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26006 states and 82531 transitions. [2022-03-03 18:51:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:16,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:16,873 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:16,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Forceful destruction successful, exit code 0 [2022-03-03 18:51:17,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:17,074 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:17,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:17,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1532182677, now seen corresponding path program 470 times [2022-03-03 18:51:17,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:17,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11644843] [2022-03-03 18:51:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:17,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:17,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:17,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11644843] [2022-03-03 18:51:17,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11644843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:17,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049450683] [2022-03-03 18:51:17,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:51:17,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:17,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:17,304 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:17,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-03-03 18:51:17,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:51:17,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:17,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:17,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:17,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:18,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049450683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:18,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:18,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-03-03 18:51:18,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326368913] [2022-03-03 18:51:18,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:18,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:51:18,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:51:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:51:18,107 INFO L87 Difference]: Start difference. First operand 26006 states and 82531 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:19,089 INFO L93 Difference]: Finished difference Result 26428 states and 83208 transitions. [2022-03-03 18:51:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:51:19,089 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:19,159 INFO L225 Difference]: With dead ends: 26428 [2022-03-03 18:51:19,159 INFO L226 Difference]: Without dead ends: 26410 [2022-03-03 18:51:19,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:19,160 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 184 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:19,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1528 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:51:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26410 states. [2022-03-03 18:51:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26410 to 25949. [2022-03-03 18:51:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25949 states, 25948 states have (on average 3.1697240635116386) internal successors, (82248), 25948 states have internal predecessors, (82248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25949 states to 25949 states and 82248 transitions. [2022-03-03 18:51:19,851 INFO L78 Accepts]: Start accepts. Automaton has 25949 states and 82248 transitions. Word has length 25 [2022-03-03 18:51:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:19,852 INFO L470 AbstractCegarLoop]: Abstraction has 25949 states and 82248 transitions. [2022-03-03 18:51:19,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 25949 states and 82248 transitions. [2022-03-03 18:51:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:19,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:19,897 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:19,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Ended with exit code 0 [2022-03-03 18:51:20,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:20,097 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1565781905, now seen corresponding path program 471 times [2022-03-03 18:51:20,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:20,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681835277] [2022-03-03 18:51:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:20,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:20,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:20,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681835277] [2022-03-03 18:51:20,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681835277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:20,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256796266] [2022-03-03 18:51:20,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:51:20,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:20,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:20,285 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:20,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-03-03 18:51:20,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:51:20,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:20,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:20,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:20,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:21,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256796266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:21,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:21,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-03-03 18:51:21,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366352061] [2022-03-03 18:51:21,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:21,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:51:21,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:51:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:51:21,012 INFO L87 Difference]: Start difference. First operand 25949 states and 82248 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-03-03 18:51:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:21,888 INFO L93 Difference]: Finished difference Result 26398 states and 82966 transitions. [2022-03-03 18:51:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:51:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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 25 [2022-03-03 18:51:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:21,957 INFO L225 Difference]: With dead ends: 26398 [2022-03-03 18:51:21,957 INFO L226 Difference]: Without dead ends: 26378 [2022-03-03 18:51:21,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:21,958 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 221 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:21,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1169 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:51:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26378 states. [2022-03-03 18:51:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26378 to 25877. [2022-03-03 18:51:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25877 states, 25876 states have (on average 3.166409027670428) internal successors, (81934), 25876 states have internal predecessors, (81934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25877 states to 25877 states and 81934 transitions. [2022-03-03 18:51:22,626 INFO L78 Accepts]: Start accepts. Automaton has 25877 states and 81934 transitions. Word has length 25 [2022-03-03 18:51:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:22,626 INFO L470 AbstractCegarLoop]: Abstraction has 25877 states and 81934 transitions. [2022-03-03 18:51:22,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-03-03 18:51:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 25877 states and 81934 transitions. [2022-03-03 18:51:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:22,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:22,667 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:22,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Forceful destruction successful, exit code 0 [2022-03-03 18:51:22,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable484 [2022-03-03 18:51:22,868 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1687609323, now seen corresponding path program 472 times [2022-03-03 18:51:22,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:22,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142665820] [2022-03-03 18:51:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:22,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:23,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:23,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142665820] [2022-03-03 18:51:23,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142665820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:23,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395706459] [2022-03-03 18:51:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:51:23,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:23,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:23,064 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:23,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-03-03 18:51:23,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:51:23,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:23,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:23,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395706459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:23,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:23,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-03-03 18:51:23,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314950515] [2022-03-03 18:51:23,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:23,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:51:23,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:51:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:51:23,743 INFO L87 Difference]: Start difference. First operand 25877 states and 81934 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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) [2022-03-03 18:51:24,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:24,791 INFO L93 Difference]: Finished difference Result 26361 states and 82705 transitions. [2022-03-03 18:51:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 18:51:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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 25 [2022-03-03 18:51:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:24,859 INFO L225 Difference]: With dead ends: 26361 [2022-03-03 18:51:24,859 INFO L226 Difference]: Without dead ends: 26339 [2022-03-03 18:51:24,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:24,859 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 185 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:24,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1385 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 18:51:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26339 states. [2022-03-03 18:51:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26339 to 25791. [2022-03-03 18:51:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25791 states, 25790 states have (on average 3.164831329972858) internal successors, (81621), 25790 states have internal predecessors, (81621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25791 states to 25791 states and 81621 transitions. [2022-03-03 18:51:25,582 INFO L78 Accepts]: Start accepts. Automaton has 25791 states and 81621 transitions. Word has length 25 [2022-03-03 18:51:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:25,583 INFO L470 AbstractCegarLoop]: Abstraction has 25791 states and 81621 transitions. [2022-03-03 18:51:25,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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) [2022-03-03 18:51:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 25791 states and 81621 transitions. [2022-03-03 18:51:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:25,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:25,629 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:25,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-03-03 18:51:25,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2022-03-03 18:51:25,829 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:25,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:25,830 INFO L85 PathProgramCache]: Analyzing trace with hash -536477713, now seen corresponding path program 473 times [2022-03-03 18:51:25,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:25,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484611201] [2022-03-03 18:51:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:25,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:26,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:26,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484611201] [2022-03-03 18:51:26,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484611201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:26,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296777441] [2022-03-03 18:51:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:51:26,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:26,030 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:26,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-03-03 18:51:26,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:51:26,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:26,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:26,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296777441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:26,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:26,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-03-03 18:51:26,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501362585] [2022-03-03 18:51:26,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:26,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:51:26,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:51:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:51:26,689 INFO L87 Difference]: Start difference. First operand 25791 states and 81621 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:27,650 INFO L93 Difference]: Finished difference Result 26316 states and 82452 transitions. [2022-03-03 18:51:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 18:51:27,651 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:27,715 INFO L225 Difference]: With dead ends: 26316 [2022-03-03 18:51:27,715 INFO L226 Difference]: Without dead ends: 26292 [2022-03-03 18:51:27,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:27,715 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 224 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:27,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1091 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:51:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26292 states. [2022-03-03 18:51:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26292 to 25713. [2022-03-03 18:51:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25713 states, 25712 states have (on average 3.164281269446173) internal successors, (81360), 25712 states have internal predecessors, (81360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25713 states to 25713 states and 81360 transitions. [2022-03-03 18:51:28,363 INFO L78 Accepts]: Start accepts. Automaton has 25713 states and 81360 transitions. Word has length 25 [2022-03-03 18:51:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:28,363 INFO L470 AbstractCegarLoop]: Abstraction has 25713 states and 81360 transitions. [2022-03-03 18:51:28,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 25713 states and 81360 transitions. [2022-03-03 18:51:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:28,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:28,410 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:28,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Ended with exit code 0 [2022-03-03 18:51:28,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-03-03 18:51:28,611 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -763699093, now seen corresponding path program 474 times [2022-03-03 18:51:28,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:28,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641267245] [2022-03-03 18:51:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:28,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:28,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:28,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641267245] [2022-03-03 18:51:28,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641267245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:28,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444331206] [2022-03-03 18:51:28,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:51:28,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:28,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:28,814 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:28,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-03-03 18:51:28,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:51:28,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:28,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:29,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:29,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444331206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:29,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:29,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2022-03-03 18:51:29,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441322098] [2022-03-03 18:51:29,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:29,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:51:29,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:51:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:51:29,453 INFO L87 Difference]: Start difference. First operand 25713 states and 81360 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:30,490 INFO L93 Difference]: Finished difference Result 26083 states and 81944 transitions. [2022-03-03 18:51:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 18:51:30,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:30,666 INFO L225 Difference]: With dead ends: 26083 [2022-03-03 18:51:30,666 INFO L226 Difference]: Without dead ends: 26057 [2022-03-03 18:51:30,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:30,666 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 167 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:30,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1157 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 18:51:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2022-03-03 18:51:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 25637. [2022-03-03 18:51:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 3.1651973786862224) internal successors, (81143), 25636 states have internal predecessors, (81143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 81143 transitions. [2022-03-03 18:51:31,126 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 81143 transitions. Word has length 25 [2022-03-03 18:51:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:31,126 INFO L470 AbstractCegarLoop]: Abstraction has 25637 states and 81143 transitions. [2022-03-03 18:51:31,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 81143 transitions. [2022-03-03 18:51:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:31,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:31,167 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:31,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Forceful destruction successful, exit code 0 [2022-03-03 18:51:31,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-03-03 18:51:31,368 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 782372719, now seen corresponding path program 475 times [2022-03-03 18:51:31,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:31,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326496543] [2022-03-03 18:51:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:31,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:31,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326496543] [2022-03-03 18:51:31,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326496543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:31,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603171638] [2022-03-03 18:51:31,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:51:31,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:31,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:31,587 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:31,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-03-03 18:51:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:31,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:32,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603171638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:32,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:32,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-03-03 18:51:32,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986683938] [2022-03-03 18:51:32,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:32,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 18:51:32,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 18:51:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:51:32,212 INFO L87 Difference]: Start difference. First operand 25637 states and 81143 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:33,216 INFO L93 Difference]: Finished difference Result 25903 states and 81553 transitions. [2022-03-03 18:51:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 18:51:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:33,281 INFO L225 Difference]: With dead ends: 25903 [2022-03-03 18:51:33,281 INFO L226 Difference]: Without dead ends: 25896 [2022-03-03 18:51:33,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:51:33,282 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 153 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:33,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 971 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:51:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25896 states. [2022-03-03 18:51:33,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25896 to 25651. [2022-03-03 18:51:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25651 states, 25650 states have (on average 3.164288499025341) internal successors, (81164), 25650 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 81164 transitions. [2022-03-03 18:51:33,829 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 81164 transitions. Word has length 25 [2022-03-03 18:51:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:33,829 INFO L470 AbstractCegarLoop]: Abstraction has 25651 states and 81164 transitions. [2022-03-03 18:51:33,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 81164 transitions. [2022-03-03 18:51:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:33,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:33,874 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:33,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Ended with exit code 0 [2022-03-03 18:51:34,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-03-03 18:51:34,075 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1442714773, now seen corresponding path program 476 times [2022-03-03 18:51:34,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:34,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717925876] [2022-03-03 18:51:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:34,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:34,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717925876] [2022-03-03 18:51:34,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717925876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:34,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700073031] [2022-03-03 18:51:34,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:51:34,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:34,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:34,260 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:34,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-03-03 18:51:34,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:51:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:34,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:35,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700073031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:35,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:35,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 36 [2022-03-03 18:51:35,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616331287] [2022-03-03 18:51:35,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:35,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:51:35,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:51:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:51:35,057 INFO L87 Difference]: Start difference. First operand 25651 states and 81164 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:35,667 INFO L93 Difference]: Finished difference Result 26339 states and 82876 transitions. [2022-03-03 18:51:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:51:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:35,734 INFO L225 Difference]: With dead ends: 26339 [2022-03-03 18:51:35,734 INFO L226 Difference]: Without dead ends: 26329 [2022-03-03 18:51:35,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:35,735 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 229 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:35,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 845 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26329 states. [2022-03-03 18:51:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26329 to 25789. [2022-03-03 18:51:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25789 states, 25788 states have (on average 3.167248332557779) internal successors, (81677), 25788 states have internal predecessors, (81677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25789 states to 25789 states and 81677 transitions. [2022-03-03 18:51:36,417 INFO L78 Accepts]: Start accepts. Automaton has 25789 states and 81677 transitions. Word has length 25 [2022-03-03 18:51:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:36,417 INFO L470 AbstractCegarLoop]: Abstraction has 25789 states and 81677 transitions. [2022-03-03 18:51:36,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25789 states and 81677 transitions. [2022-03-03 18:51:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:36,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:36,473 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:36,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Forceful destruction successful, exit code 0 [2022-03-03 18:51:36,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:36,674 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash 171987951, now seen corresponding path program 477 times [2022-03-03 18:51:36,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:36,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582228425] [2022-03-03 18:51:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:36,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:36,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:36,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582228425] [2022-03-03 18:51:36,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582228425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:36,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560466908] [2022-03-03 18:51:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:51:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:36,856 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:36,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-03-03 18:51:36,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:51:36,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:37,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:37,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560466908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:37,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:37,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 35 [2022-03-03 18:51:37,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407522992] [2022-03-03 18:51:37,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:37,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:51:37,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:51:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:51:37,646 INFO L87 Difference]: Start difference. First operand 25789 states and 81677 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:38,251 INFO L93 Difference]: Finished difference Result 26321 states and 82830 transitions. [2022-03-03 18:51:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:51:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:38,340 INFO L225 Difference]: With dead ends: 26321 [2022-03-03 18:51:38,340 INFO L226 Difference]: Without dead ends: 26314 [2022-03-03 18:51:38,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:51:38,341 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 201 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:38,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 810 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26314 states. [2022-03-03 18:51:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26314 to 25787. [2022-03-03 18:51:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25787 states, 25786 states have (on average 3.1671837431164196) internal successors, (81669), 25786 states have internal predecessors, (81669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25787 states to 25787 states and 81669 transitions. [2022-03-03 18:51:39,149 INFO L78 Accepts]: Start accepts. Automaton has 25787 states and 81669 transitions. Word has length 25 [2022-03-03 18:51:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:39,149 INFO L470 AbstractCegarLoop]: Abstraction has 25787 states and 81669 transitions. [2022-03-03 18:51:39,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25787 states and 81669 transitions. [2022-03-03 18:51:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:39,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:39,203 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:39,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-03-03 18:51:39,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:39,404 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash -871259967, now seen corresponding path program 478 times [2022-03-03 18:51:39,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:39,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935541666] [2022-03-03 18:51:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:39,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:39,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:39,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935541666] [2022-03-03 18:51:39,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935541666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:39,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179619675] [2022-03-03 18:51:39,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:51:39,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:39,596 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:39,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-03-03 18:51:39,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:51:39,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:39,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:39,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:39,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:40,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179619675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:40,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:40,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-03-03 18:51:40,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120191331] [2022-03-03 18:51:40,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:40,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:51:40,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:51:40,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:51:40,434 INFO L87 Difference]: Start difference. First operand 25787 states and 81669 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:40,993 INFO L93 Difference]: Finished difference Result 26101 states and 82243 transitions. [2022-03-03 18:51:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:51:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:51:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:41,061 INFO L225 Difference]: With dead ends: 26101 [2022-03-03 18:51:41,061 INFO L226 Difference]: Without dead ends: 26094 [2022-03-03 18:51:41,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:51:41,061 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 168 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:41,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 735 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2022-03-03 18:51:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 25786. [2022-03-03 18:51:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25786 states, 25785 states have (on average 3.1671902268760905) internal successors, (81666), 25785 states have internal predecessors, (81666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25786 states to 25786 states and 81666 transitions. [2022-03-03 18:51:41,781 INFO L78 Accepts]: Start accepts. Automaton has 25786 states and 81666 transitions. Word has length 25 [2022-03-03 18:51:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 25786 states and 81666 transitions. [2022-03-03 18:51:41,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 25786 states and 81666 transitions. [2022-03-03 18:51:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:41,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:41,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:41,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-03-03 18:51:42,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2022-03-03 18:51:42,028 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash -186632085, now seen corresponding path program 479 times [2022-03-03 18:51:42,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:42,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400944514] [2022-03-03 18:51:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:42,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:42,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400944514] [2022-03-03 18:51:42,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400944514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:42,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027482812] [2022-03-03 18:51:42,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:51:42,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:42,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:42,215 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:42,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-03-03 18:51:42,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 18:51:42,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:42,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:42,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:43,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027482812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:43,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:43,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 36 [2022-03-03 18:51:43,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118458047] [2022-03-03 18:51:43,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:43,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:51:43,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:43,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:51:43,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:51:43,019 INFO L87 Difference]: Start difference. First operand 25786 states and 81666 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:43,645 INFO L93 Difference]: Finished difference Result 26623 states and 83970 transitions. [2022-03-03 18:51:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:51:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:51:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:43,713 INFO L225 Difference]: With dead ends: 26623 [2022-03-03 18:51:43,713 INFO L226 Difference]: Without dead ends: 26613 [2022-03-03 18:51:43,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:43,714 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 223 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:43,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 875 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-03-03 18:51:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26000. [2022-03-03 18:51:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.1711219662294705) internal successors, (82446), 25999 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 82446 transitions. [2022-03-03 18:51:44,420 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 82446 transitions. Word has length 25 [2022-03-03 18:51:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:44,421 INFO L470 AbstractCegarLoop]: Abstraction has 26000 states and 82446 transitions. [2022-03-03 18:51:44,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 82446 transitions. [2022-03-03 18:51:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:44,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:44,467 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:44,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Ended with exit code 0 [2022-03-03 18:51:44,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:44,667 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1428070639, now seen corresponding path program 480 times [2022-03-03 18:51:44,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:44,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904614609] [2022-03-03 18:51:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:44,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:44,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:44,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904614609] [2022-03-03 18:51:44,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904614609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:44,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346239402] [2022-03-03 18:51:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:51:44,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:44,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:44,853 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:44,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-03-03 18:51:44,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 18:51:44,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:45,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:45,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346239402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:45,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:45,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 35 [2022-03-03 18:51:45,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368470494] [2022-03-03 18:51:45,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:45,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:51:45,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:45,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:51:45,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:51:45,650 INFO L87 Difference]: Start difference. First operand 26000 states and 82446 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:46,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:46,296 INFO L93 Difference]: Finished difference Result 26604 states and 83911 transitions. [2022-03-03 18:51:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:51:46,296 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:51:46,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:46,385 INFO L225 Difference]: With dead ends: 26604 [2022-03-03 18:51:46,385 INFO L226 Difference]: Without dead ends: 26597 [2022-03-03 18:51:46,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:51:46,385 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 196 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:46,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 853 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:46,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26597 states. [2022-03-03 18:51:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26597 to 25997. [2022-03-03 18:51:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25997 states, 25996 states have (on average 3.1710263117402677) internal successors, (82434), 25996 states have internal predecessors, (82434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25997 states to 25997 states and 82434 transitions. [2022-03-03 18:51:47,195 INFO L78 Accepts]: Start accepts. Automaton has 25997 states and 82434 transitions. Word has length 25 [2022-03-03 18:51:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:47,196 INFO L470 AbstractCegarLoop]: Abstraction has 25997 states and 82434 transitions. [2022-03-03 18:51:47,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 25997 states and 82434 transitions. [2022-03-03 18:51:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:47,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:47,251 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:47,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Forceful destruction successful, exit code 0 [2022-03-03 18:51:47,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:47,452 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash 384822721, now seen corresponding path program 481 times [2022-03-03 18:51:47,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:47,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417708124] [2022-03-03 18:51:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:47,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:47,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417708124] [2022-03-03 18:51:47,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417708124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:47,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978956586] [2022-03-03 18:51:47,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:51:47,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:47,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:47,636 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:47,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-03-03 18:51:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:47,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:47,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:48,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978956586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:48,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:48,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 34 [2022-03-03 18:51:48,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252362858] [2022-03-03 18:51:48,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:48,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:51:48,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:51:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:51:48,454 INFO L87 Difference]: Start difference. First operand 25997 states and 82434 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:49,118 INFO L93 Difference]: Finished difference Result 26449 states and 83488 transitions. [2022-03-03 18:51:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:51:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:51:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:49,208 INFO L225 Difference]: With dead ends: 26449 [2022-03-03 18:51:49,209 INFO L226 Difference]: Without dead ends: 26436 [2022-03-03 18:51:49,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:51:49,209 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 158 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:49,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 764 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26436 states. [2022-03-03 18:51:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26436 to 26004. [2022-03-03 18:51:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26004 states, 26003 states have (on average 3.1706341575972004) internal successors, (82446), 26003 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26004 states to 26004 states and 82446 transitions. [2022-03-03 18:51:49,986 INFO L78 Accepts]: Start accepts. Automaton has 26004 states and 82446 transitions. Word has length 25 [2022-03-03 18:51:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:49,986 INFO L470 AbstractCegarLoop]: Abstraction has 26004 states and 82446 transitions. [2022-03-03 18:51:49,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 26004 states and 82446 transitions. [2022-03-03 18:51:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:50,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:50,042 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:50,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-03-03 18:51:50,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2022-03-03 18:51:50,243 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash 920052523, now seen corresponding path program 482 times [2022-03-03 18:51:50,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:50,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046610785] [2022-03-03 18:51:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:50,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:50,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:50,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046610785] [2022-03-03 18:51:50,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046610785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:50,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054275694] [2022-03-03 18:51:50,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:51:50,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:50,439 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:50,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-03-03 18:51:50,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:51:50,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:50,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:51,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054275694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:51,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:51,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-03-03 18:51:51,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795406304] [2022-03-03 18:51:51,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:51,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:51:51,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:51:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:51:51,235 INFO L87 Difference]: Start difference. First operand 26004 states and 82446 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:51:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:51,901 INFO L93 Difference]: Finished difference Result 26271 states and 82944 transitions. [2022-03-03 18:51:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:51:51,902 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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 25 [2022-03-03 18:51:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:52,134 INFO L225 Difference]: With dead ends: 26271 [2022-03-03 18:51:52,134 INFO L226 Difference]: Without dead ends: 26264 [2022-03-03 18:51:52,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:51:52,135 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 168 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:52,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 740 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26264 states. [2022-03-03 18:51:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26264 to 26002. [2022-03-03 18:51:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26002 states, 26001 states have (on average 3.1706472827968155) internal successors, (82440), 26001 states have internal predecessors, (82440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26002 states to 26002 states and 82440 transitions. [2022-03-03 18:51:52,806 INFO L78 Accepts]: Start accepts. Automaton has 26002 states and 82440 transitions. Word has length 25 [2022-03-03 18:51:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:52,806 INFO L470 AbstractCegarLoop]: Abstraction has 26002 states and 82440 transitions. [2022-03-03 18:51:52,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:51:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 26002 states and 82440 transitions. [2022-03-03 18:51:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:52,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:52,863 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:52,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-03-03 18:51:53,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:53,063 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash 318111907, now seen corresponding path program 483 times [2022-03-03 18:51:53,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:53,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72448825] [2022-03-03 18:51:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:53,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:53,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72448825] [2022-03-03 18:51:53,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72448825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:53,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408273823] [2022-03-03 18:51:53,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:51:53,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:53,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:53,257 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:53,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-03-03 18:51:53,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 18:51:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:53,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:51:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:54,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408273823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:54,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:54,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-03-03 18:51:54,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765595658] [2022-03-03 18:51:54,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:54,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:51:54,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:51:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:51:54,056 INFO L87 Difference]: Start difference. First operand 26002 states and 82440 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:51:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:54,765 INFO L93 Difference]: Finished difference Result 26167 states and 82719 transitions. [2022-03-03 18:51:54,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:51:54,766 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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 25 [2022-03-03 18:51:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:54,851 INFO L225 Difference]: With dead ends: 26167 [2022-03-03 18:51:54,852 INFO L226 Difference]: Without dead ends: 26151 [2022-03-03 18:51:54,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:51:54,852 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 141 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:54,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 657 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2022-03-03 18:51:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25962. [2022-03-03 18:51:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25962 states, 25961 states have (on average 3.170910211471053) internal successors, (82320), 25961 states have internal predecessors, (82320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25962 states to 25962 states and 82320 transitions. [2022-03-03 18:51:55,542 INFO L78 Accepts]: Start accepts. Automaton has 25962 states and 82320 transitions. Word has length 25 [2022-03-03 18:51:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:55,542 INFO L470 AbstractCegarLoop]: Abstraction has 25962 states and 82320 transitions. [2022-03-03 18:51:55,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:51:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 25962 states and 82320 transitions. [2022-03-03 18:51:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:55,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:55,598 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:55,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-03-03 18:51:55,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-03-03 18:51:55,799 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash 97225579, now seen corresponding path program 484 times [2022-03-03 18:51:55,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:55,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479585223] [2022-03-03 18:51:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:55,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:55,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479585223] [2022-03-03 18:51:55,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479585223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:55,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155250438] [2022-03-03 18:51:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:51:55,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:55,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:55,988 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:55,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-03-03 18:51:56,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:51:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:56,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:56,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:56,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155250438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:56,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:56,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 36 [2022-03-03 18:51:56,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38372935] [2022-03-03 18:51:56,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:56,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:51:56,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:56,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:51:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:51:56,871 INFO L87 Difference]: Start difference. First operand 25962 states and 82320 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:57,531 INFO L93 Difference]: Finished difference Result 26771 states and 84501 transitions. [2022-03-03 18:51:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:51:57,532 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:51:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:57,622 INFO L225 Difference]: With dead ends: 26771 [2022-03-03 18:51:57,623 INFO L226 Difference]: Without dead ends: 26761 [2022-03-03 18:51:57,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:51:57,623 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 231 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:57,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 846 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:51:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26761 states. [2022-03-03 18:51:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26761 to 26195. [2022-03-03 18:51:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26195 states, 26194 states have (on average 3.1746964953806214) internal successors, (83158), 26194 states have internal predecessors, (83158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26195 states to 26195 states and 83158 transitions. [2022-03-03 18:51:58,296 INFO L78 Accepts]: Start accepts. Automaton has 26195 states and 83158 transitions. Word has length 25 [2022-03-03 18:51:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:58,296 INFO L470 AbstractCegarLoop]: Abstraction has 26195 states and 83158 transitions. [2022-03-03 18:51:58,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 26195 states and 83158 transitions. [2022-03-03 18:51:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:51:58,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:58,352 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:58,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Ended with exit code 0 [2022-03-03 18:51:58,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-03-03 18:51:58,552 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1711928303, now seen corresponding path program 485 times [2022-03-03 18:51:58,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:58,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234439780] [2022-03-03 18:51:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:58,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:58,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:58,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234439780] [2022-03-03 18:51:58,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234439780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:58,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388821046] [2022-03-03 18:51:58,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:51:58,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:58,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:58,736 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:51:58,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-03-03 18:51:58,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 18:51:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:51:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:59,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:59,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388821046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:59,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:59,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 35 [2022-03-03 18:51:59,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635855954] [2022-03-03 18:51:59,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:59,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:51:59,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:51:59,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:51:59,520 INFO L87 Difference]: Start difference. First operand 26195 states and 83158 transitions. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:00,292 INFO L93 Difference]: Finished difference Result 26752 states and 84431 transitions. [2022-03-03 18:52:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:52:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:52:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:00,383 INFO L225 Difference]: With dead ends: 26752 [2022-03-03 18:52:00,383 INFO L226 Difference]: Without dead ends: 26745 [2022-03-03 18:52:00,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:00,383 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 173 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:00,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1091 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2022-03-03 18:52:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 26191. [2022-03-03 18:52:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26191 states, 26190 states have (on average 3.174570446735395) internal successors, (83142), 26190 states have internal predecessors, (83142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26191 states to 26191 states and 83142 transitions. [2022-03-03 18:52:01,009 INFO L78 Accepts]: Start accepts. Automaton has 26191 states and 83142 transitions. Word has length 25 [2022-03-03 18:52:01,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:01,009 INFO L470 AbstractCegarLoop]: Abstraction has 26191 states and 83142 transitions. [2022-03-03 18:52:01,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:01,009 INFO L276 IsEmpty]: Start isEmpty. Operand 26191 states and 83142 transitions. [2022-03-03 18:52:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:01,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:01,065 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:01,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:01,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2022-03-03 18:52:01,266 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash 668680385, now seen corresponding path program 486 times [2022-03-03 18:52:01,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:01,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551367634] [2022-03-03 18:52:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:01,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:01,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551367634] [2022-03-03 18:52:01,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551367634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:01,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559549859] [2022-03-03 18:52:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:52:01,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:01,461 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:01,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-03-03 18:52:01,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 18:52:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:01,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:02,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559549859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:02,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:02,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 34 [2022-03-03 18:52:02,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367412611] [2022-03-03 18:52:02,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:02,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:52:02,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:52:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:52:02,283 INFO L87 Difference]: Start difference. First operand 26191 states and 83142 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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) [2022-03-03 18:52:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:03,042 INFO L93 Difference]: Finished difference Result 26690 states and 84238 transitions. [2022-03-03 18:52:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:52:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 25 [2022-03-03 18:52:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:03,130 INFO L225 Difference]: With dead ends: 26690 [2022-03-03 18:52:03,130 INFO L226 Difference]: Without dead ends: 26677 [2022-03-03 18:52:03,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:03,130 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 245 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:03,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 763 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:52:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2022-03-03 18:52:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26188. [2022-03-03 18:52:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26188 states, 26187 states have (on average 3.1743613243212283) internal successors, (83127), 26187 states have internal predecessors, (83127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26188 states to 26188 states and 83127 transitions. [2022-03-03 18:52:03,806 INFO L78 Accepts]: Start accepts. Automaton has 26188 states and 83127 transitions. Word has length 25 [2022-03-03 18:52:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:03,806 INFO L470 AbstractCegarLoop]: Abstraction has 26188 states and 83127 transitions. [2022-03-03 18:52:03,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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) [2022-03-03 18:52:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 26188 states and 83127 transitions. [2022-03-03 18:52:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:03,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:03,862 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:03,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Ended with exit code 0 [2022-03-03 18:52:04,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-03-03 18:52:04,063 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:04,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1203910187, now seen corresponding path program 487 times [2022-03-03 18:52:04,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:04,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076033861] [2022-03-03 18:52:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:04,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:04,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:04,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076033861] [2022-03-03 18:52:04,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076033861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:04,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354227175] [2022-03-03 18:52:04,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:52:04,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:04,256 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:04,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-03-03 18:52:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:04,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:05,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354227175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:05,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:05,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-03-03 18:52:05,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227720675] [2022-03-03 18:52:05,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:05,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:52:05,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:52:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:52:05,039 INFO L87 Difference]: Start difference. First operand 26188 states and 83127 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-03-03 18:52:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:05,823 INFO L93 Difference]: Finished difference Result 26573 states and 83882 transitions. [2022-03-03 18:52:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:52:05,824 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 25 [2022-03-03 18:52:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:05,914 INFO L225 Difference]: With dead ends: 26573 [2022-03-03 18:52:05,914 INFO L226 Difference]: Without dead ends: 26557 [2022-03-03 18:52:05,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:05,915 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 204 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:05,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 917 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26557 states. [2022-03-03 18:52:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26557 to 26197. [2022-03-03 18:52:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26197 states, 26196 states have (on average 3.1737288135593222) internal successors, (83139), 26196 states have internal predecessors, (83139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26197 states to 26197 states and 83139 transitions. [2022-03-03 18:52:06,584 INFO L78 Accepts]: Start accepts. Automaton has 26197 states and 83139 transitions. Word has length 25 [2022-03-03 18:52:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:06,584 INFO L470 AbstractCegarLoop]: Abstraction has 26197 states and 83139 transitions. [2022-03-03 18:52:06,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-03-03 18:52:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26197 states and 83139 transitions. [2022-03-03 18:52:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:06,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:06,641 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:06,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:06,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2022-03-03 18:52:06,841 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash 616164865, now seen corresponding path program 488 times [2022-03-03 18:52:06,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:06,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818173660] [2022-03-03 18:52:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:07,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:07,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818173660] [2022-03-03 18:52:07,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818173660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:07,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809757689] [2022-03-03 18:52:07,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:52:07,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:07,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:07,049 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:07,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-03-03 18:52:07,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:52:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:07,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:07,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809757689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:07,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:07,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-03-03 18:52:07,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676480772] [2022-03-03 18:52:07,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:07,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:52:07,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:52:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:52:07,826 INFO L87 Difference]: Start difference. First operand 26197 states and 83139 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:08,729 INFO L93 Difference]: Finished difference Result 26468 states and 83627 transitions. [2022-03-03 18:52:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:52:08,730 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:52:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:08,814 INFO L225 Difference]: With dead ends: 26468 [2022-03-03 18:52:08,814 INFO L226 Difference]: Without dead ends: 26461 [2022-03-03 18:52:08,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:08,815 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 171 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:08,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 858 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2022-03-03 18:52:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26194. [2022-03-03 18:52:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26194 states, 26193 states have (on average 3.1737487114878022) internal successors, (83130), 26193 states have internal predecessors, (83130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26194 states to 26194 states and 83130 transitions. [2022-03-03 18:52:09,440 INFO L78 Accepts]: Start accepts. Automaton has 26194 states and 83130 transitions. Word has length 25 [2022-03-03 18:52:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:09,440 INFO L470 AbstractCegarLoop]: Abstraction has 26194 states and 83130 transitions. [2022-03-03 18:52:09,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26194 states and 83130 transitions. [2022-03-03 18:52:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:09,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:09,496 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:09,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-03-03 18:52:09,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-03-03 18:52:09,697 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1162178005, now seen corresponding path program 489 times [2022-03-03 18:52:09,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:09,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516690229] [2022-03-03 18:52:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:09,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:09,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516690229] [2022-03-03 18:52:09,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516690229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:09,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031972721] [2022-03-03 18:52:09,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:52:09,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:09,891 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:09,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-03-03 18:52:09,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:52:09,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:09,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:52:10,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:10,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031972721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:10,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:10,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-03-03 18:52:10,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970534796] [2022-03-03 18:52:10,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:10,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:52:10,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:52:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:52:10,685 INFO L87 Difference]: Start difference. First operand 26194 states and 83130 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:52:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:11,377 INFO L93 Difference]: Finished difference Result 26478 states and 83625 transitions. [2022-03-03 18:52:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:52:11,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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 25 [2022-03-03 18:52:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:11,468 INFO L225 Difference]: With dead ends: 26478 [2022-03-03 18:52:11,469 INFO L226 Difference]: Without dead ends: 26462 [2022-03-03 18:52:11,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:11,469 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 190 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:11,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 753 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26462 states. [2022-03-03 18:52:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26462 to 26156. [2022-03-03 18:52:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26156 states, 26155 states have (on average 3.172968839610017) internal successors, (82989), 26155 states have internal predecessors, (82989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26156 states to 26156 states and 82989 transitions. [2022-03-03 18:52:12,152 INFO L78 Accepts]: Start accepts. Automaton has 26156 states and 82989 transitions. Word has length 25 [2022-03-03 18:52:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:12,152 INFO L470 AbstractCegarLoop]: Abstraction has 26156 states and 82989 transitions. [2022-03-03 18:52:12,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:52:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 26156 states and 82989 transitions. [2022-03-03 18:52:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:12,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:12,207 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:12,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Ended with exit code 0 [2022-03-03 18:52:12,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:12,408 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash -864125047, now seen corresponding path program 490 times [2022-03-03 18:52:12,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:12,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397197980] [2022-03-03 18:52:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:12,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:12,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397197980] [2022-03-03 18:52:12,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397197980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:12,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142762345] [2022-03-03 18:52:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:52:12,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:12,617 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:12,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-03-03 18:52:12,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:52:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:52:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:13,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142762345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:13,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:13,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-03-03 18:52:13,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547145016] [2022-03-03 18:52:13,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:13,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:52:13,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:13,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:52:13,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:52:13,395 INFO L87 Difference]: Start difference. First operand 26156 states and 82989 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:14,075 INFO L93 Difference]: Finished difference Result 26350 states and 83325 transitions. [2022-03-03 18:52:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:52:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:52:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:14,141 INFO L225 Difference]: With dead ends: 26350 [2022-03-03 18:52:14,141 INFO L226 Difference]: Without dead ends: 26331 [2022-03-03 18:52:14,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:14,142 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 158 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:14,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 691 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:52:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2022-03-03 18:52:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 26122. [2022-03-03 18:52:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26122 states, 26121 states have (on average 3.173193981853681) internal successors, (82887), 26121 states have internal predecessors, (82887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26122 states to 26122 states and 82887 transitions. [2022-03-03 18:52:14,834 INFO L78 Accepts]: Start accepts. Automaton has 26122 states and 82887 transitions. Word has length 25 [2022-03-03 18:52:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:14,834 INFO L470 AbstractCegarLoop]: Abstraction has 26122 states and 82887 transitions. [2022-03-03 18:52:14,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26122 states and 82887 transitions. [2022-03-03 18:52:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:14,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:14,890 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:14,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Ended with exit code 0 [2022-03-03 18:52:15,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:15,091 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 306878571, now seen corresponding path program 491 times [2022-03-03 18:52:15,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:15,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385118831] [2022-03-03 18:52:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:15,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:15,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:15,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385118831] [2022-03-03 18:52:15,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385118831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:15,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193100316] [2022-03-03 18:52:15,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:52:15,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:15,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:15,282 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:15,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-03-03 18:52:15,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 18:52:15,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:15,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:16,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193100316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:16,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:16,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 36 [2022-03-03 18:52:16,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292730874] [2022-03-03 18:52:16,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:16,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:52:16,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:52:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:52:16,076 INFO L87 Difference]: Start difference. First operand 26122 states and 82887 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:16,749 INFO L93 Difference]: Finished difference Result 26878 states and 84798 transitions. [2022-03-03 18:52:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:52:16,749 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:52:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:16,819 INFO L225 Difference]: With dead ends: 26878 [2022-03-03 18:52:16,819 INFO L226 Difference]: Without dead ends: 26868 [2022-03-03 18:52:16,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:52:16,819 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 253 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:16,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 901 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2022-03-03 18:52:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26338. [2022-03-03 18:52:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26338 states, 26337 states have (on average 3.1761780005315714) internal successors, (83651), 26337 states have internal predecessors, (83651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26338 states to 26338 states and 83651 transitions. [2022-03-03 18:52:17,409 INFO L78 Accepts]: Start accepts. Automaton has 26338 states and 83651 transitions. Word has length 25 [2022-03-03 18:52:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:17,409 INFO L470 AbstractCegarLoop]: Abstraction has 26338 states and 83651 transitions. [2022-03-03 18:52:17,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 26338 states and 83651 transitions. [2022-03-03 18:52:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:17,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:17,454 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:17,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Ended with exit code 0 [2022-03-03 18:52:17,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2022-03-03 18:52:17,655 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1921581295, now seen corresponding path program 492 times [2022-03-03 18:52:17,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:17,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294053955] [2022-03-03 18:52:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:17,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:17,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294053955] [2022-03-03 18:52:17,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294053955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:17,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454009108] [2022-03-03 18:52:17,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:52:17,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:17,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:17,830 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:17,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-03-03 18:52:17,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 18:52:17,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:18,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:18,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454009108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:18,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:18,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 35 [2022-03-03 18:52:18,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077484160] [2022-03-03 18:52:18,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:18,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:52:18,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:52:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:52:18,593 INFO L87 Difference]: Start difference. First operand 26338 states and 83651 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:19,231 INFO L93 Difference]: Finished difference Result 26859 states and 84730 transitions. [2022-03-03 18:52:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:52:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:52:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:19,300 INFO L225 Difference]: With dead ends: 26859 [2022-03-03 18:52:19,300 INFO L226 Difference]: Without dead ends: 26852 [2022-03-03 18:52:19,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:19,300 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 225 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:19,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 865 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:52:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2022-03-03 18:52:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 26333. [2022-03-03 18:52:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26333 states, 26332 states have (on average 3.1760215707124413) internal successors, (83631), 26332 states have internal predecessors, (83631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26333 states to 26333 states and 83631 transitions. [2022-03-03 18:52:19,966 INFO L78 Accepts]: Start accepts. Automaton has 26333 states and 83631 transitions. Word has length 25 [2022-03-03 18:52:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:19,966 INFO L470 AbstractCegarLoop]: Abstraction has 26333 states and 83631 transitions. [2022-03-03 18:52:19,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 26333 states and 83631 transitions. [2022-03-03 18:52:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:20,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:20,012 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:20,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:20,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:20,213 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash 878333377, now seen corresponding path program 493 times [2022-03-03 18:52:20,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:20,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598248519] [2022-03-03 18:52:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:20,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:20,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:20,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598248519] [2022-03-03 18:52:20,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598248519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:20,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698077539] [2022-03-03 18:52:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:52:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:20,396 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:20,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-03-03 18:52:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:21,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698077539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:21,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:21,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 34 [2022-03-03 18:52:21,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966550614] [2022-03-03 18:52:21,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:21,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:52:21,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:52:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:52:21,152 INFO L87 Difference]: Start difference. First operand 26333 states and 83631 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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) [2022-03-03 18:52:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:21,894 INFO L93 Difference]: Finished difference Result 26840 states and 84655 transitions. [2022-03-03 18:52:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:52:21,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 25 [2022-03-03 18:52:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:21,964 INFO L225 Difference]: With dead ends: 26840 [2022-03-03 18:52:21,964 INFO L226 Difference]: Without dead ends: 26827 [2022-03-03 18:52:21,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:21,964 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 187 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:21,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1009 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2022-03-03 18:52:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 26329. [2022-03-03 18:52:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26329 states, 26328 states have (on average 3.175820419325433) internal successors, (83613), 26328 states have internal predecessors, (83613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26329 states to 26329 states and 83613 transitions. [2022-03-03 18:52:22,552 INFO L78 Accepts]: Start accepts. Automaton has 26329 states and 83613 transitions. Word has length 25 [2022-03-03 18:52:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:22,552 INFO L470 AbstractCegarLoop]: Abstraction has 26329 states and 83613 transitions. [2022-03-03 18:52:22,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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) [2022-03-03 18:52:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26329 states and 83613 transitions. [2022-03-03 18:52:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:22,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:22,598 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:22,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-03-03 18:52:22,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2022-03-03 18:52:22,799 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1413563179, now seen corresponding path program 494 times [2022-03-03 18:52:22,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:22,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502053937] [2022-03-03 18:52:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:22,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:22,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502053937] [2022-03-03 18:52:22,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502053937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:22,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120427759] [2022-03-03 18:52:22,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:52:22,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:22,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:22,990 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:22,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-03-03 18:52:23,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:52:23,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:23,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:23,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120427759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:23,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:23,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 33 [2022-03-03 18:52:23,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884249391] [2022-03-03 18:52:23,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:23,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:52:23,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:52:23,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:52:23,741 INFO L87 Difference]: Start difference. First operand 26329 states and 83613 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:24,387 INFO L93 Difference]: Finished difference Result 26818 states and 84533 transitions. [2022-03-03 18:52:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:52:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:52:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:24,450 INFO L225 Difference]: With dead ends: 26818 [2022-03-03 18:52:24,450 INFO L226 Difference]: Without dead ends: 26802 [2022-03-03 18:52:24,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:24,451 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 273 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:24,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 730 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:52:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26802 states. [2022-03-03 18:52:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26802 to 26325. [2022-03-03 18:52:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26325 states, 26324 states have (on average 3.175657194955174) internal successors, (83596), 26324 states have internal predecessors, (83596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26325 states to 26325 states and 83596 transitions. [2022-03-03 18:52:25,102 INFO L78 Accepts]: Start accepts. Automaton has 26325 states and 83596 transitions. Word has length 25 [2022-03-03 18:52:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:25,102 INFO L470 AbstractCegarLoop]: Abstraction has 26325 states and 83596 transitions. [2022-03-03 18:52:25,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 26325 states and 83596 transitions. [2022-03-03 18:52:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:25,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:25,146 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:25,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-03-03 18:52:25,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:25,347 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 825817857, now seen corresponding path program 495 times [2022-03-03 18:52:25,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:25,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390640737] [2022-03-03 18:52:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:25,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:25,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:25,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390640737] [2022-03-03 18:52:25,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390640737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:25,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725768085] [2022-03-03 18:52:25,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:52:25,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:25,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:25,541 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:25,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-03-03 18:52:25,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 18:52:25,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:25,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:26,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725768085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:26,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:26,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-03-03 18:52:26,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188596555] [2022-03-03 18:52:26,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:26,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:52:26,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:52:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:52:26,264 INFO L87 Difference]: Start difference. First operand 26325 states and 83596 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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) [2022-03-03 18:52:27,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:27,009 INFO L93 Difference]: Finished difference Result 26741 states and 84363 transitions. [2022-03-03 18:52:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:52:27,009 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 25 [2022-03-03 18:52:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:27,079 INFO L225 Difference]: With dead ends: 26741 [2022-03-03 18:52:27,079 INFO L226 Difference]: Without dead ends: 26722 [2022-03-03 18:52:27,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:27,080 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 197 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:27,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 779 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states. [2022-03-03 18:52:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26722 to 26330. [2022-03-03 18:52:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26330 states, 26329 states have (on average 3.1751300846974817) internal successors, (83598), 26329 states have internal predecessors, (83598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26330 states to 26330 states and 83598 transitions. [2022-03-03 18:52:27,644 INFO L78 Accepts]: Start accepts. Automaton has 26330 states and 83598 transitions. Word has length 25 [2022-03-03 18:52:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:27,645 INFO L470 AbstractCegarLoop]: Abstraction has 26330 states and 83598 transitions. [2022-03-03 18:52:27,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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) [2022-03-03 18:52:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26330 states and 83598 transitions. [2022-03-03 18:52:27,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:27,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:27,692 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:27,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:27,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:27,892 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:27,893 INFO L85 PathProgramCache]: Analyzing trace with hash -214417941, now seen corresponding path program 496 times [2022-03-03 18:52:27,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:27,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182755259] [2022-03-03 18:52:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:28,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:28,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182755259] [2022-03-03 18:52:28,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182755259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:28,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295065791] [2022-03-03 18:52:28,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:52:28,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:28,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:28,095 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:28,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-03-03 18:52:28,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:52:28,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:28,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:28,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:28,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295065791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:28,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:28,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2022-03-03 18:52:28,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411124084] [2022-03-03 18:52:28,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:28,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:52:28,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:28,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:52:28,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:52:28,794 INFO L87 Difference]: Start difference. First operand 26330 states and 83598 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:52:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:29,565 INFO L93 Difference]: Finished difference Result 26637 states and 84135 transitions. [2022-03-03 18:52:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:52:29,565 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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 25 [2022-03-03 18:52:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:29,629 INFO L225 Difference]: With dead ends: 26637 [2022-03-03 18:52:29,630 INFO L226 Difference]: Without dead ends: 26630 [2022-03-03 18:52:29,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:29,630 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 153 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:29,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 835 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26630 states. [2022-03-03 18:52:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26630 to 26326. [2022-03-03 18:52:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26325 states have (on average 3.175156695156695) internal successors, (83586), 26325 states have internal predecessors, (83586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 83586 transitions. [2022-03-03 18:52:30,287 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 83586 transitions. Word has length 25 [2022-03-03 18:52:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:30,287 INFO L470 AbstractCegarLoop]: Abstraction has 26326 states and 83586 transitions. [2022-03-03 18:52:30,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:52:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 83586 transitions. [2022-03-03 18:52:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:30,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:30,334 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:30,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Ended with exit code 0 [2022-03-03 18:52:30,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:30,535 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash 193474979, now seen corresponding path program 497 times [2022-03-03 18:52:30,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:30,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939482455] [2022-03-03 18:52:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:30,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:30,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:30,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939482455] [2022-03-03 18:52:30,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939482455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:30,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620612560] [2022-03-03 18:52:30,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:52:30,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:30,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:30,723 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:30,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-03-03 18:52:30,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:52:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:30,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:30,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:52:31,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:31,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620612560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:31,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:31,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-03-03 18:52:31,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155399760] [2022-03-03 18:52:31,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:31,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:52:31,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:52:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:52:31,500 INFO L87 Difference]: Start difference. First operand 26326 states and 83586 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:52:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:32,147 INFO L93 Difference]: Finished difference Result 26655 states and 84164 transitions. [2022-03-03 18:52:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:52:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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 25 [2022-03-03 18:52:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:32,213 INFO L225 Difference]: With dead ends: 26655 [2022-03-03 18:52:32,213 INFO L226 Difference]: Without dead ends: 26639 [2022-03-03 18:52:32,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:32,213 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 246 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:32,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 722 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:52:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26639 states. [2022-03-03 18:52:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26639 to 26300. [2022-03-03 18:52:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26300 states, 26299 states have (on average 3.1746073995208945) internal successors, (83489), 26299 states have internal predecessors, (83489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26300 states to 26300 states and 83489 transitions. [2022-03-03 18:52:32,784 INFO L78 Accepts]: Start accepts. Automaton has 26300 states and 83489 transitions. Word has length 25 [2022-03-03 18:52:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:32,784 INFO L470 AbstractCegarLoop]: Abstraction has 26300 states and 83489 transitions. [2022-03-03 18:52:32,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2022-03-03 18:52:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26300 states and 83489 transitions. [2022-03-03 18:52:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:32,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:32,832 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:32,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-03-03 18:52:33,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-03-03 18:52:33,032 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 491527937, now seen corresponding path program 498 times [2022-03-03 18:52:33,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:33,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971994889] [2022-03-03 18:52:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:33,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:33,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971994889] [2022-03-03 18:52:33,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971994889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:33,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012464038] [2022-03-03 18:52:33,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:52:33,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:33,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:33,234 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:33,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-03-03 18:52:33,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:52:33,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:52:33,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:34,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012464038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:34,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:34,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-03-03 18:52:34,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370452972] [2022-03-03 18:52:34,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:34,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:52:34,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:52:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:52:34,001 INFO L87 Difference]: Start difference. First operand 26300 states and 83489 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:34,706 INFO L93 Difference]: Finished difference Result 26683 states and 84164 transitions. [2022-03-03 18:52:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 18:52:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:52:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:34,796 INFO L225 Difference]: With dead ends: 26683 [2022-03-03 18:52:34,796 INFO L226 Difference]: Without dead ends: 26664 [2022-03-03 18:52:34,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:34,797 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 219 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:34,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 667 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:52:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26664 states. [2022-03-03 18:52:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26664 to 26276. [2022-03-03 18:52:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26276 states, 26275 states have (on average 3.1743482397716463) internal successors, (83406), 26275 states have internal predecessors, (83406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26276 states to 26276 states and 83406 transitions. [2022-03-03 18:52:35,560 INFO L78 Accepts]: Start accepts. Automaton has 26276 states and 83406 transitions. Word has length 25 [2022-03-03 18:52:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:35,560 INFO L470 AbstractCegarLoop]: Abstraction has 26276 states and 83406 transitions. [2022-03-03 18:52:35,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 26276 states and 83406 transitions. [2022-03-03 18:52:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:35,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:35,611 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:35,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:35,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2022-03-03 18:52:35,811 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1141235043, now seen corresponding path program 499 times [2022-03-03 18:52:35,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:35,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228241200] [2022-03-03 18:52:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:35,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:36,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:36,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228241200] [2022-03-03 18:52:36,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228241200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:36,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850338872] [2022-03-03 18:52:36,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:52:36,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:36,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:36,012 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:36,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-03-03 18:52:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:52:36,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:36,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850338872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:36,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:36,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2022-03-03 18:52:36,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519804445] [2022-03-03 18:52:36,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:36,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:52:36,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:52:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:52:36,723 INFO L87 Difference]: Start difference. First operand 26276 states and 83406 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:52:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:37,410 INFO L93 Difference]: Finished difference Result 26515 states and 83825 transitions. [2022-03-03 18:52:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:52:37,410 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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 25 [2022-03-03 18:52:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:37,498 INFO L225 Difference]: With dead ends: 26515 [2022-03-03 18:52:37,498 INFO L226 Difference]: Without dead ends: 26493 [2022-03-03 18:52:37,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:37,498 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 171 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:37,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 608 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:52:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26493 states. [2022-03-03 18:52:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26493 to 26252. [2022-03-03 18:52:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26252 states, 26251 states have (on average 3.174507637804274) internal successors, (83334), 26251 states have internal predecessors, (83334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26252 states to 26252 states and 83334 transitions. [2022-03-03 18:52:38,165 INFO L78 Accepts]: Start accepts. Automaton has 26252 states and 83334 transitions. Word has length 25 [2022-03-03 18:52:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:38,165 INFO L470 AbstractCegarLoop]: Abstraction has 26252 states and 83334 transitions. [2022-03-03 18:52:38,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 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) [2022-03-03 18:52:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 26252 states and 83334 transitions. [2022-03-03 18:52:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:38,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:38,221 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:38,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-03-03 18:52:38,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:38,422 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1783813269, now seen corresponding path program 500 times [2022-03-03 18:52:38,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:38,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595951600] [2022-03-03 18:52:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:38,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:38,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:38,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595951600] [2022-03-03 18:52:38,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595951600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:38,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603456981] [2022-03-03 18:52:38,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:52:38,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:38,639 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:38,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-03-03 18:52:38,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:52:38,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:38,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:38,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:39,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603456981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:39,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:39,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 36 [2022-03-03 18:52:39,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011165779] [2022-03-03 18:52:39,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:39,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 18:52:39,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 18:52:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 18:52:39,435 INFO L87 Difference]: Start difference. First operand 26252 states and 83334 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:40,177 INFO L93 Difference]: Finished difference Result 27031 states and 85190 transitions. [2022-03-03 18:52:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:52:40,177 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 18:52:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:40,268 INFO L225 Difference]: With dead ends: 27031 [2022-03-03 18:52:40,269 INFO L226 Difference]: Without dead ends: 27021 [2022-03-03 18:52:40,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:52:40,269 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 219 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:40,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 980 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2022-03-03 18:52:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26424. [2022-03-03 18:52:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26424 states, 26423 states have (on average 3.1765885781326872) internal successors, (83935), 26423 states have internal predecessors, (83935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 83935 transitions. [2022-03-03 18:52:41,059 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 83935 transitions. Word has length 25 [2022-03-03 18:52:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:41,059 INFO L470 AbstractCegarLoop]: Abstraction has 26424 states and 83935 transitions. [2022-03-03 18:52:41,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 83935 transitions. [2022-03-03 18:52:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:41,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:41,116 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:41,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Ended with exit code 0 [2022-03-03 18:52:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:41,316 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:41,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash -169110545, now seen corresponding path program 501 times [2022-03-03 18:52:41,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:41,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646174257] [2022-03-03 18:52:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:41,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:41,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:41,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646174257] [2022-03-03 18:52:41,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646174257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:41,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145212319] [2022-03-03 18:52:41,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:52:41,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:41,499 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:41,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-03-03 18:52:41,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:52:41,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:41,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:42,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145212319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:42,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:42,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 35 [2022-03-03 18:52:42,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975875940] [2022-03-03 18:52:42,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:42,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 18:52:42,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:42,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 18:52:42,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:52:42,247 INFO L87 Difference]: Start difference. First operand 26424 states and 83935 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 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) [2022-03-03 18:52:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:42,946 INFO L93 Difference]: Finished difference Result 27015 states and 85143 transitions. [2022-03-03 18:52:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:52:42,947 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 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 25 [2022-03-03 18:52:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:43,038 INFO L225 Difference]: With dead ends: 27015 [2022-03-03 18:52:43,038 INFO L226 Difference]: Without dead ends: 27008 [2022-03-03 18:52:43,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:43,038 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 228 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:43,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 881 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27008 states. [2022-03-03 18:52:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27008 to 26408. [2022-03-03 18:52:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26408 states, 26407 states have (on average 3.176506229408869) internal successors, (83882), 26407 states have internal predecessors, (83882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26408 states to 26408 states and 83882 transitions. [2022-03-03 18:52:43,715 INFO L78 Accepts]: Start accepts. Automaton has 26408 states and 83882 transitions. Word has length 25 [2022-03-03 18:52:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:43,715 INFO L470 AbstractCegarLoop]: Abstraction has 26408 states and 83882 transitions. [2022-03-03 18:52:43,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 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) [2022-03-03 18:52:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 26408 states and 83882 transitions. [2022-03-03 18:52:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:43,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:43,771 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:43,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Ended with exit code 0 [2022-03-03 18:52:43,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:43,972 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1212358463, now seen corresponding path program 502 times [2022-03-03 18:52:43,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:43,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860246057] [2022-03-03 18:52:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:43,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:44,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:44,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860246057] [2022-03-03 18:52:44,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860246057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:44,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146317609] [2022-03-03 18:52:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:52:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:44,185 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:44,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-03-03 18:52:44,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:52:44,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:44,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:44,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146317609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:44,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:44,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 34 [2022-03-03 18:52:44,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618737127] [2022-03-03 18:52:44,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 18:52:44,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 18:52:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:52:44,968 INFO L87 Difference]: Start difference. First operand 26408 states and 83882 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:45,736 INFO L93 Difference]: Finished difference Result 27006 states and 85093 transitions. [2022-03-03 18:52:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:52:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:52:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:45,823 INFO L225 Difference]: With dead ends: 27006 [2022-03-03 18:52:45,824 INFO L226 Difference]: Without dead ends: 26993 [2022-03-03 18:52:45,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:45,824 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 231 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:45,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 927 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2022-03-03 18:52:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26403. [2022-03-03 18:52:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26403 states, 26402 states have (on average 3.176312400575714) internal successors, (83861), 26402 states have internal predecessors, (83861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26403 states to 26403 states and 83861 transitions. [2022-03-03 18:52:46,603 INFO L78 Accepts]: Start accepts. Automaton has 26403 states and 83861 transitions. Word has length 25 [2022-03-03 18:52:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:46,603 INFO L470 AbstractCegarLoop]: Abstraction has 26403 states and 83861 transitions. [2022-03-03 18:52:46,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 26403 states and 83861 transitions. [2022-03-03 18:52:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:46,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:46,660 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:46,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Ended with exit code 0 [2022-03-03 18:52:46,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:46,861 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash -677128661, now seen corresponding path program 503 times [2022-03-03 18:52:46,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:46,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120768779] [2022-03-03 18:52:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:46,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:47,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:47,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120768779] [2022-03-03 18:52:47,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120768779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:47,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186134482] [2022-03-03 18:52:47,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:52:47,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:47,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:47,094 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:47,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-03-03 18:52:47,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:52:47,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:47,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:47,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:47,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186134482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:47,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:47,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2022-03-03 18:52:47,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939634959] [2022-03-03 18:52:47,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:47,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 18:52:47,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:47,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 18:52:47,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 18:52:47,888 INFO L87 Difference]: Start difference. First operand 26403 states and 83861 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-03-03 18:52:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:48,667 INFO L93 Difference]: Finished difference Result 27006 states and 85046 transitions. [2022-03-03 18:52:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:52:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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 25 [2022-03-03 18:52:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:48,757 INFO L225 Difference]: With dead ends: 27006 [2022-03-03 18:52:48,757 INFO L226 Difference]: Without dead ends: 26990 [2022-03-03 18:52:48,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:48,757 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 254 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:48,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 900 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2022-03-03 18:52:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26398. [2022-03-03 18:52:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26398 states, 26397 states have (on average 3.176156381406978) internal successors, (83841), 26397 states have internal predecessors, (83841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26398 states to 26398 states and 83841 transitions. [2022-03-03 18:52:49,435 INFO L78 Accepts]: Start accepts. Automaton has 26398 states and 83841 transitions. Word has length 25 [2022-03-03 18:52:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:49,435 INFO L470 AbstractCegarLoop]: Abstraction has 26398 states and 83841 transitions. [2022-03-03 18:52:49,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-03-03 18:52:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 26398 states and 83841 transitions. [2022-03-03 18:52:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:49,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:49,492 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:49,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:49,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2022-03-03 18:52:49,693 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1264873983, now seen corresponding path program 504 times [2022-03-03 18:52:49,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:49,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671853423] [2022-03-03 18:52:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:49,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:49,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671853423] [2022-03-03 18:52:49,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671853423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:49,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004175687] [2022-03-03 18:52:49,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:52:49,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:49,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:49,897 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:49,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-03-03 18:52:49,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:52:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:50,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:50,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004175687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:50,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:50,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 32 [2022-03-03 18:52:50,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983793031] [2022-03-03 18:52:50,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:50,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 18:52:50,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 18:52:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 18:52:50,634 INFO L87 Difference]: Start difference. First operand 26398 states and 83841 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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) [2022-03-03 18:52:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:51,491 INFO L93 Difference]: Finished difference Result 27010 states and 85005 transitions. [2022-03-03 18:52:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:52:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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 25 [2022-03-03 18:52:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:51,561 INFO L225 Difference]: With dead ends: 27010 [2022-03-03 18:52:51,561 INFO L226 Difference]: Without dead ends: 26991 [2022-03-03 18:52:51,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:51,562 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 194 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:51,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 981 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 18:52:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26991 states. [2022-03-03 18:52:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26991 to 26393. [2022-03-03 18:52:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26393 states, 26392 states have (on average 3.176038193391937) internal successors, (83822), 26392 states have internal predecessors, (83822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26393 states to 26393 states and 83822 transitions. [2022-03-03 18:52:52,213 INFO L78 Accepts]: Start accepts. Automaton has 26393 states and 83822 transitions. Word has length 25 [2022-03-03 18:52:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:52,213 INFO L470 AbstractCegarLoop]: Abstraction has 26393 states and 83822 transitions. [2022-03-03 18:52:52,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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) [2022-03-03 18:52:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 26393 states and 83822 transitions. [2022-03-03 18:52:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:52,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:52,261 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:52,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-03-03 18:52:52,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:52,462 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1989857515, now seen corresponding path program 505 times [2022-03-03 18:52:52,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:52,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409780737] [2022-03-03 18:52:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:52,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:52,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409780737] [2022-03-03 18:52:52,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409780737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:52,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688042606] [2022-03-03 18:52:52,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:52:52,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:52,660 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:52,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-03-03 18:52:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:52,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:53,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688042606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:53,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:53,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2022-03-03 18:52:53,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72731558] [2022-03-03 18:52:53,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:53,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 18:52:53,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 18:52:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:52:53,355 INFO L87 Difference]: Start difference. First operand 26393 states and 83822 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:54,117 INFO L93 Difference]: Finished difference Result 26898 states and 84763 transitions. [2022-03-03 18:52:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:52:54,117 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:52:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:54,189 INFO L225 Difference]: With dead ends: 26898 [2022-03-03 18:52:54,189 INFO L226 Difference]: Without dead ends: 26876 [2022-03-03 18:52:54,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 18:52:54,190 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 213 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:54,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 776 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26876 states. [2022-03-03 18:52:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26876 to 26388. [2022-03-03 18:52:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26388 states, 26387 states have (on average 3.175957858036154) internal successors, (83804), 26387 states have internal predecessors, (83804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26388 states to 26388 states and 83804 transitions. [2022-03-03 18:52:54,743 INFO L78 Accepts]: Start accepts. Automaton has 26388 states and 83804 transitions. Word has length 25 [2022-03-03 18:52:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:54,743 INFO L470 AbstractCegarLoop]: Abstraction has 26388 states and 83804 transitions. [2022-03-03 18:52:54,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26388 states and 83804 transitions. [2022-03-03 18:52:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 18:52:54,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:54,788 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:54,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Ended with exit code 0 [2022-03-03 18:52:54,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:54,988 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash -192681151, now seen corresponding path program 506 times [2022-03-03 18:52:54,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:54,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700529648] [2022-03-03 18:52:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:54,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:55,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:55,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700529648] [2022-03-03 18:52:55,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700529648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:55,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144140457] [2022-03-03 18:52:55,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:52:55,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:55,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:55,192 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:55,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-03-03 18:52:55,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:52:55,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 18:52:55,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:55,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:55,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144140457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:55,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:55,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 30 [2022-03-03 18:52:55,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295034221] [2022-03-03 18:52:55,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:55,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 18:52:55,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 18:52:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:52:55,848 INFO L87 Difference]: Start difference. First operand 26388 states and 83804 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:56,661 INFO L93 Difference]: Finished difference Result 26777 states and 84498 transitions. [2022-03-03 18:52:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:52:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:52:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:56,721 INFO L225 Difference]: With dead ends: 26777 [2022-03-03 18:52:56,721 INFO L226 Difference]: Without dead ends: 26770 [2022-03-03 18:52:56,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:52:56,721 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 161 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:56,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 845 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:52:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26770 states. [2022-03-03 18:52:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26770 to 26383. [2022-03-03 18:52:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26383 states, 26382 states have (on average 3.1759912061253885) internal successors, (83789), 26382 states have internal predecessors, (83789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26383 states to 26383 states and 83789 transitions. [2022-03-03 18:52:57,340 INFO L78 Accepts]: Start accepts. Automaton has 26383 states and 83789 transitions. Word has length 25 [2022-03-03 18:52:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:57,340 INFO L470 AbstractCegarLoop]: Abstraction has 26383 states and 83789 transitions. [2022-03-03 18:52:57,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 26383 states and 83789 transitions. [2022-03-03 18:52:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:52:57,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:57,384 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:57,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Ended with exit code 0 [2022-03-03 18:52:57,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:57,584 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1473663481, now seen corresponding path program 507 times [2022-03-03 18:52:57,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:57,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158770320] [2022-03-03 18:52:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:57,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:57,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:57,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158770320] [2022-03-03 18:52:57,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158770320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:57,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039156714] [2022-03-03 18:52:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:52:57,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:57,674 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:57,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-03-03 18:52:57,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 18:52:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:52:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:57,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:57,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039156714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:57,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:57,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2022-03-03 18:52:57,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158744671] [2022-03-03 18:52:57,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:57,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:52:57,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:52:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:52:57,867 INFO L87 Difference]: Start difference. First operand 26383 states and 83789 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:58,207 INFO L93 Difference]: Finished difference Result 34009 states and 106082 transitions. [2022-03-03 18:52:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 18:52:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:52:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:58,289 INFO L225 Difference]: With dead ends: 34009 [2022-03-03 18:52:58,289 INFO L226 Difference]: Without dead ends: 33983 [2022-03-03 18:52:58,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 18:52:58,289 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:58,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 156 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:52:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2022-03-03 18:52:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 26378. [2022-03-03 18:52:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26378 states, 26377 states have (on average 3.1762141259430563) internal successors, (83779), 26377 states have internal predecessors, (83779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26378 states to 26378 states and 83779 transitions. [2022-03-03 18:52:58,959 INFO L78 Accepts]: Start accepts. Automaton has 26378 states and 83779 transitions. Word has length 26 [2022-03-03 18:52:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:58,960 INFO L470 AbstractCegarLoop]: Abstraction has 26378 states and 83779 transitions. [2022-03-03 18:52:58,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 26378 states and 83779 transitions. [2022-03-03 18:52:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:52:59,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:59,009 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:59,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Ended with exit code 0 [2022-03-03 18:52:59,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2022-03-03 18:52:59,209 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1240304151, now seen corresponding path program 508 times [2022-03-03 18:52:59,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:59,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891031343] [2022-03-03 18:52:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:59,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:59,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891031343] [2022-03-03 18:52:59,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891031343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:59,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931125483] [2022-03-03 18:52:59,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:52:59,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:59,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:59,300 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:52:59,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-03-03 18:52:59,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:52:59,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:59,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:52:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:59,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:59,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931125483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:59,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:59,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2022-03-03 18:52:59,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453170435] [2022-03-03 18:52:59,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:59,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:52:59,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:52:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:52:59,480 INFO L87 Difference]: Start difference. First operand 26378 states and 83779 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:59,797 INFO L93 Difference]: Finished difference Result 34313 states and 106998 transitions. [2022-03-03 18:52:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:52:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:52:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:59,889 INFO L225 Difference]: With dead ends: 34313 [2022-03-03 18:52:59,889 INFO L226 Difference]: Without dead ends: 34313 [2022-03-03 18:52:59,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2022-03-03 18:52:59,889 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 129 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:59,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 125 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:52:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34313 states. [2022-03-03 18:53:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34313 to 26571. [2022-03-03 18:53:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26571 states, 26570 states have (on average 3.174934136243884) internal successors, (84358), 26570 states have internal predecessors, (84358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26571 states to 26571 states and 84358 transitions. [2022-03-03 18:53:00,726 INFO L78 Accepts]: Start accepts. Automaton has 26571 states and 84358 transitions. Word has length 26 [2022-03-03 18:53:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:00,726 INFO L470 AbstractCegarLoop]: Abstraction has 26571 states and 84358 transitions. [2022-03-03 18:53:00,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 26571 states and 84358 transitions. [2022-03-03 18:53:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:00,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:00,772 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:00,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Ended with exit code 0 [2022-03-03 18:53:00,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-03-03 18:53:00,973 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1349081931, now seen corresponding path program 509 times [2022-03-03 18:53:00,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:00,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085578700] [2022-03-03 18:53:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:00,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:01,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:01,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085578700] [2022-03-03 18:53:01,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085578700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:01,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523726330] [2022-03-03 18:53:01,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:53:01,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:01,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:01,062 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:01,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-03-03 18:53:01,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 18:53:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:01,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:01,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:01,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523726330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:01,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:01,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:01,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144845847] [2022-03-03 18:53:01,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:01,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:01,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:01,268 INFO L87 Difference]: Start difference. First operand 26571 states and 84358 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:02,426 INFO L93 Difference]: Finished difference Result 38199 states and 118872 transitions. [2022-03-03 18:53:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 18:53:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:02,524 INFO L225 Difference]: With dead ends: 38199 [2022-03-03 18:53:02,524 INFO L226 Difference]: Without dead ends: 38187 [2022-03-03 18:53:02,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:53:02,525 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 353 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:02,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 215 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38187 states. [2022-03-03 18:53:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38187 to 30268. [2022-03-03 18:53:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30268 states, 30267 states have (on average 3.1952621667162258) internal successors, (96711), 30267 states have internal predecessors, (96711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30268 states to 30268 states and 96711 transitions. [2022-03-03 18:53:03,429 INFO L78 Accepts]: Start accepts. Automaton has 30268 states and 96711 transitions. Word has length 26 [2022-03-03 18:53:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:03,429 INFO L470 AbstractCegarLoop]: Abstraction has 30268 states and 96711 transitions. [2022-03-03 18:53:03,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30268 states and 96711 transitions. [2022-03-03 18:53:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:03,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:03,485 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:03,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:03,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:03,686 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1920536737, now seen corresponding path program 510 times [2022-03-03 18:53:03,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:03,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51585785] [2022-03-03 18:53:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:03,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:03,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:03,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51585785] [2022-03-03 18:53:03,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51585785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:03,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578452250] [2022-03-03 18:53:03,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:53:03,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:03,774 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:03,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-03-03 18:53:03,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 18:53:03,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:03,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:03,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:03,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578452250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:03,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:03,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:03,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396796573] [2022-03-03 18:53:03,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:03,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:03,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:03,977 INFO L87 Difference]: Start difference. First operand 30268 states and 96711 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:05,139 INFO L93 Difference]: Finished difference Result 37783 states and 117254 transitions. [2022-03-03 18:53:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 18:53:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:05,242 INFO L225 Difference]: With dead ends: 37783 [2022-03-03 18:53:05,242 INFO L226 Difference]: Without dead ends: 37777 [2022-03-03 18:53:05,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2878 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 18:53:05,244 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 292 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:05,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 252 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37777 states. [2022-03-03 18:53:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37777 to 28751. [2022-03-03 18:53:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28751 states, 28750 states have (on average 3.173495652173913) internal successors, (91238), 28750 states have internal predecessors, (91238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28751 states to 28751 states and 91238 transitions. [2022-03-03 18:53:06,142 INFO L78 Accepts]: Start accepts. Automaton has 28751 states and 91238 transitions. Word has length 26 [2022-03-03 18:53:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:06,142 INFO L470 AbstractCegarLoop]: Abstraction has 28751 states and 91238 transitions. [2022-03-03 18:53:06,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 28751 states and 91238 transitions. [2022-03-03 18:53:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:06,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:06,197 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:06,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:06,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2022-03-03 18:53:06,398 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash -11034809, now seen corresponding path program 511 times [2022-03-03 18:53:06,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:06,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533163002] [2022-03-03 18:53:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:06,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:06,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:06,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533163002] [2022-03-03 18:53:06,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533163002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:06,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678495429] [2022-03-03 18:53:06,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:53:06,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:06,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:06,655 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:06,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-03-03 18:53:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:06,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:06,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:06,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678495429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:06,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:06,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:06,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212084606] [2022-03-03 18:53:06,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:06,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:06,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:06,858 INFO L87 Difference]: Start difference. First operand 28751 states and 91238 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:08,275 INFO L93 Difference]: Finished difference Result 33431 states and 104589 transitions. [2022-03-03 18:53:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 18:53:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:53:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:08,368 INFO L225 Difference]: With dead ends: 33431 [2022-03-03 18:53:08,368 INFO L226 Difference]: Without dead ends: 33431 [2022-03-03 18:53:08,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 18:53:08,370 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 243 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:08,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 357 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2022-03-03 18:53:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 30211. [2022-03-03 18:53:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30211 states, 30210 states have (on average 3.1860973187686197) internal successors, (96252), 30210 states have internal predecessors, (96252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30211 states to 30211 states and 96252 transitions. [2022-03-03 18:53:09,154 INFO L78 Accepts]: Start accepts. Automaton has 30211 states and 96252 transitions. Word has length 26 [2022-03-03 18:53:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:09,154 INFO L470 AbstractCegarLoop]: Abstraction has 30211 states and 96252 transitions. [2022-03-03 18:53:09,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 30211 states and 96252 transitions. [2022-03-03 18:53:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:09,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:09,206 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:09,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Ended with exit code 0 [2022-03-03 18:53:09,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2022-03-03 18:53:09,407 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash -475625913, now seen corresponding path program 512 times [2022-03-03 18:53:09,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:09,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642298520] [2022-03-03 18:53:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:09,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:09,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:09,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642298520] [2022-03-03 18:53:09,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642298520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:09,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371505977] [2022-03-03 18:53:09,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:53:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:09,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:09,494 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:09,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-03-03 18:53:09,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:53:09,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:09,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:09,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:09,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:09,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371505977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:09,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:09,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:09,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390343580] [2022-03-03 18:53:09,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:09,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:09,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:09,690 INFO L87 Difference]: Start difference. First operand 30211 states and 96252 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:11,103 INFO L93 Difference]: Finished difference Result 32625 states and 102515 transitions. [2022-03-03 18:53:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-03 18:53:11,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:53:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:11,176 INFO L225 Difference]: With dead ends: 32625 [2022-03-03 18:53:11,176 INFO L226 Difference]: Without dead ends: 32621 [2022-03-03 18:53:11,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3378 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4219, Invalid=7991, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 18:53:11,177 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 197 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:11,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 254 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32621 states. [2022-03-03 18:53:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32621 to 27450. [2022-03-03 18:53:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27450 states, 27449 states have (on average 3.1584757186054135) internal successors, (86697), 27449 states have internal predecessors, (86697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27450 states to 27450 states and 86697 transitions. [2022-03-03 18:53:11,875 INFO L78 Accepts]: Start accepts. Automaton has 27450 states and 86697 transitions. Word has length 26 [2022-03-03 18:53:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:11,875 INFO L470 AbstractCegarLoop]: Abstraction has 27450 states and 86697 transitions. [2022-03-03 18:53:11,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 27450 states and 86697 transitions. [2022-03-03 18:53:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:11,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:11,925 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:11,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:12,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2022-03-03 18:53:12,126 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1839200757, now seen corresponding path program 513 times [2022-03-03 18:53:12,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:12,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257333557] [2022-03-03 18:53:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:12,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:12,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:12,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257333557] [2022-03-03 18:53:12,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257333557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:12,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780740801] [2022-03-03 18:53:12,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:53:12,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:12,213 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:12,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-03-03 18:53:12,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:53:12,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:12,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:12,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:12,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:12,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780740801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:12,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:12,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:12,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404420694] [2022-03-03 18:53:12,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:12,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:12,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:12,415 INFO L87 Difference]: Start difference. First operand 27450 states and 86697 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:13,580 INFO L93 Difference]: Finished difference Result 35448 states and 108975 transitions. [2022-03-03 18:53:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 18:53:13,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:13,671 INFO L225 Difference]: With dead ends: 35448 [2022-03-03 18:53:13,671 INFO L226 Difference]: Without dead ends: 35439 [2022-03-03 18:53:13,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1836, Invalid=6174, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 18:53:13,672 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 368 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:13,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 167 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35439 states. [2022-03-03 18:53:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35439 to 27796. [2022-03-03 18:53:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27796 states, 27795 states have (on average 3.1588774959525097) internal successors, (87801), 27795 states have internal predecessors, (87801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27796 states to 27796 states and 87801 transitions. [2022-03-03 18:53:14,560 INFO L78 Accepts]: Start accepts. Automaton has 27796 states and 87801 transitions. Word has length 26 [2022-03-03 18:53:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:14,560 INFO L470 AbstractCegarLoop]: Abstraction has 27796 states and 87801 transitions. [2022-03-03 18:53:14,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27796 states and 87801 transitions. [2022-03-03 18:53:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:14,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:14,618 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:14,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:14,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable526 [2022-03-03 18:53:14,818 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1868021217, now seen corresponding path program 514 times [2022-03-03 18:53:14,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:14,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059832014] [2022-03-03 18:53:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:14,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:14,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059832014] [2022-03-03 18:53:14,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059832014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:14,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045444063] [2022-03-03 18:53:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:53:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:14,903 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:14,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-03-03 18:53:14,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:53:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:15,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:15,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045444063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:15,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:15,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:15,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873838760] [2022-03-03 18:53:15,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:15,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:15,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:15,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:15,098 INFO L87 Difference]: Start difference. First operand 27796 states and 87801 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:16,124 INFO L93 Difference]: Finished difference Result 35824 states and 110259 transitions. [2022-03-03 18:53:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 18:53:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:16,221 INFO L225 Difference]: With dead ends: 35824 [2022-03-03 18:53:16,222 INFO L226 Difference]: Without dead ends: 35812 [2022-03-03 18:53:16,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1573, Invalid=5567, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 18:53:16,222 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 272 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:16,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 196 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2022-03-03 18:53:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 28033. [2022-03-03 18:53:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28033 states, 28032 states have (on average 3.161208618721461) internal successors, (88615), 28032 states have internal predecessors, (88615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28033 states to 28033 states and 88615 transitions. [2022-03-03 18:53:17,062 INFO L78 Accepts]: Start accepts. Automaton has 28033 states and 88615 transitions. Word has length 26 [2022-03-03 18:53:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:17,062 INFO L470 AbstractCegarLoop]: Abstraction has 28033 states and 88615 transitions. [2022-03-03 18:53:17,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 28033 states and 88615 transitions. [2022-03-03 18:53:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:17,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:17,115 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:17,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Ended with exit code 0 [2022-03-03 18:53:17,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:17,315 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash 827785419, now seen corresponding path program 515 times [2022-03-03 18:53:17,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:17,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512536246] [2022-03-03 18:53:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:17,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:17,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512536246] [2022-03-03 18:53:17,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512536246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:17,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108554506] [2022-03-03 18:53:17,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:53:17,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:17,401 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:17,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-03-03 18:53:17,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:53:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:17,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:17,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108554506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:17,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:17,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:17,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632585875] [2022-03-03 18:53:17,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:17,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:17,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:17,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:17,601 INFO L87 Difference]: Start difference. First operand 28033 states and 88615 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:18,651 INFO L93 Difference]: Finished difference Result 36830 states and 113799 transitions. [2022-03-03 18:53:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 18:53:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:18,758 INFO L225 Difference]: With dead ends: 36830 [2022-03-03 18:53:18,758 INFO L226 Difference]: Without dead ends: 36815 [2022-03-03 18:53:18,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 18:53:18,759 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 270 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:18,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 206 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:53:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36815 states. [2022-03-03 18:53:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36815 to 28168. [2022-03-03 18:53:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28168 states, 28167 states have (on average 3.161856072709199) internal successors, (89060), 28167 states have internal predecessors, (89060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28168 states to 28168 states and 89060 transitions. [2022-03-03 18:53:19,589 INFO L78 Accepts]: Start accepts. Automaton has 28168 states and 89060 transitions. Word has length 26 [2022-03-03 18:53:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:19,589 INFO L470 AbstractCegarLoop]: Abstraction has 28168 states and 89060 transitions. [2022-03-03 18:53:19,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 28168 states and 89060 transitions. [2022-03-03 18:53:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:19,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:19,642 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:19,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Ended with exit code 0 [2022-03-03 18:53:19,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2022-03-03 18:53:19,842 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1354753247, now seen corresponding path program 516 times [2022-03-03 18:53:19,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:19,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188936271] [2022-03-03 18:53:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:19,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:19,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:19,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188936271] [2022-03-03 18:53:19,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188936271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:19,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189863303] [2022-03-03 18:53:19,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:53:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:19,927 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:19,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-03-03 18:53:19,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 18:53:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:20,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:20,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189863303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:20,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:20,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:20,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112881594] [2022-03-03 18:53:20,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:20,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:20,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:20,302 INFO L87 Difference]: Start difference. First operand 28168 states and 89060 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:21,356 INFO L93 Difference]: Finished difference Result 38080 states and 118134 transitions. [2022-03-03 18:53:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 18:53:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:21,461 INFO L225 Difference]: With dead ends: 38080 [2022-03-03 18:53:21,461 INFO L226 Difference]: Without dead ends: 38062 [2022-03-03 18:53:21,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1171, Invalid=4379, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 18:53:21,461 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 286 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:21,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 183 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:53:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38062 states. [2022-03-03 18:53:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38062 to 28241. [2022-03-03 18:53:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28241 states, 28240 states have (on average 3.1613668555240793) internal successors, (89277), 28240 states have internal predecessors, (89277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28241 states to 28241 states and 89277 transitions. [2022-03-03 18:53:22,355 INFO L78 Accepts]: Start accepts. Automaton has 28241 states and 89277 transitions. Word has length 26 [2022-03-03 18:53:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:22,356 INFO L470 AbstractCegarLoop]: Abstraction has 28241 states and 89277 transitions. [2022-03-03 18:53:22,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 28241 states and 89277 transitions. [2022-03-03 18:53:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:22,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:22,408 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:22,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-03-03 18:53:22,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2022-03-03 18:53:22,609 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:22,609 INFO L85 PathProgramCache]: Analyzing trace with hash -293975157, now seen corresponding path program 517 times [2022-03-03 18:53:22,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:22,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501172692] [2022-03-03 18:53:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:22,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:22,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:22,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501172692] [2022-03-03 18:53:22,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501172692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:22,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951788144] [2022-03-03 18:53:22,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:53:22,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:22,697 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:22,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-03-03 18:53:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:22,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:22,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:22,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:22,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951788144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:22,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:22,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:22,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367122774] [2022-03-03 18:53:22,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:22,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:22,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:22,899 INFO L87 Difference]: Start difference. First operand 28241 states and 89277 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:23,766 INFO L93 Difference]: Finished difference Result 38378 states and 118948 transitions. [2022-03-03 18:53:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 18:53:23,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:23,867 INFO L225 Difference]: With dead ends: 38378 [2022-03-03 18:53:23,868 INFO L226 Difference]: Without dead ends: 38357 [2022-03-03 18:53:23,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1034, Invalid=3796, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 18:53:23,868 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 234 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:23,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 184 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:53:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38357 states. [2022-03-03 18:53:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38357 to 28289. [2022-03-03 18:53:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.1601032239819005) internal successors, (89393), 28288 states have internal predecessors, (89393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89393 transitions. [2022-03-03 18:53:24,780 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89393 transitions. Word has length 26 [2022-03-03 18:53:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:24,780 INFO L470 AbstractCegarLoop]: Abstraction has 28289 states and 89393 transitions. [2022-03-03 18:53:24,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89393 transitions. [2022-03-03 18:53:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:24,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:24,956 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:24,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Ended with exit code 0 [2022-03-03 18:53:25,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-03-03 18:53:25,159 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:25,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1769592735, now seen corresponding path program 518 times [2022-03-03 18:53:25,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:25,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149019355] [2022-03-03 18:53:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:25,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:25,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:25,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149019355] [2022-03-03 18:53:25,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149019355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:25,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261347486] [2022-03-03 18:53:25,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:53:25,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:25,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:25,251 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:25,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-03-03 18:53:25,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:53:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:25,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:25,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:25,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261347486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:25,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:25,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-03 18:53:25,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61488417] [2022-03-03 18:53:25,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:25,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:25,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:25,459 INFO L87 Difference]: Start difference. First operand 28289 states and 89393 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:26,037 INFO L93 Difference]: Finished difference Result 35202 states and 108627 transitions. [2022-03-03 18:53:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 18:53:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:26,242 INFO L225 Difference]: With dead ends: 35202 [2022-03-03 18:53:26,243 INFO L226 Difference]: Without dead ends: 35181 [2022-03-03 18:53:26,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 18:53:26,243 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:26,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 200 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:53:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35181 states. [2022-03-03 18:53:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35181 to 28289. [2022-03-03 18:53:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.159855769230769) internal successors, (89386), 28288 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89386 transitions. [2022-03-03 18:53:26,970 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89386 transitions. Word has length 26 [2022-03-03 18:53:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:26,970 INFO L470 AbstractCegarLoop]: Abstraction has 28289 states and 89386 transitions. [2022-03-03 18:53:26,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89386 transitions. [2022-03-03 18:53:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:27,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:27,029 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:27,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:27,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2022-03-03 18:53:27,229 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1834397045, now seen corresponding path program 519 times [2022-03-03 18:53:27,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:27,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511551184] [2022-03-03 18:53:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:27,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:27,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:27,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511551184] [2022-03-03 18:53:27,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511551184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:27,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961386009] [2022-03-03 18:53:27,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:53:27,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:27,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:27,316 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:27,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-03-03 18:53:27,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 18:53:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:27,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:27,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961386009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:27,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:27,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 25 [2022-03-03 18:53:27,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364127902] [2022-03-03 18:53:27,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:27,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:27,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:27,539 INFO L87 Difference]: Start difference. First operand 28289 states and 89386 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:29,105 INFO L93 Difference]: Finished difference Result 31417 states and 97881 transitions. [2022-03-03 18:53:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-03 18:53:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:53:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:29,189 INFO L225 Difference]: With dead ends: 31417 [2022-03-03 18:53:29,189 INFO L226 Difference]: Without dead ends: 31402 [2022-03-03 18:53:29,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3387, Invalid=6315, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 18:53:29,190 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 260 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:29,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 327 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 18:53:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31402 states. [2022-03-03 18:53:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31402 to 29607. [2022-03-03 18:53:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29607 states, 29606 states have (on average 3.1732419104235627) internal successors, (93947), 29606 states have internal predecessors, (93947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29607 states to 29607 states and 93947 transitions. [2022-03-03 18:53:29,963 INFO L78 Accepts]: Start accepts. Automaton has 29607 states and 93947 transitions. Word has length 26 [2022-03-03 18:53:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:29,963 INFO L470 AbstractCegarLoop]: Abstraction has 29607 states and 93947 transitions. [2022-03-03 18:53:29,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 29607 states and 93947 transitions. [2022-03-03 18:53:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:30,020 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:30,020 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:30,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Ended with exit code 0 [2022-03-03 18:53:30,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-03-03 18:53:30,220 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:30,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1995979147, now seen corresponding path program 520 times [2022-03-03 18:53:30,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:30,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633439832] [2022-03-03 18:53:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:30,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:30,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:30,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633439832] [2022-03-03 18:53:30,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633439832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:30,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831429063] [2022-03-03 18:53:30,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:53:30,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:30,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:30,302 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:30,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-03-03 18:53:30,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:53:30,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:30,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:30,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831429063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:30,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:30,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 25 [2022-03-03 18:53:30,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650517859] [2022-03-03 18:53:30,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:30,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:30,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:30,505 INFO L87 Difference]: Start difference. First operand 29607 states and 93947 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:32,200 INFO L93 Difference]: Finished difference Result 30731 states and 96043 transitions. [2022-03-03 18:53:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 18:53:32,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:32,285 INFO L225 Difference]: With dead ends: 30731 [2022-03-03 18:53:32,286 INFO L226 Difference]: Without dead ends: 30719 [2022-03-03 18:53:32,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4100, Invalid=8332, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 18:53:32,287 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 229 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:32,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 319 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30719 states. [2022-03-03 18:53:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30719 to 27213. [2022-03-03 18:53:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27213 states, 27212 states have (on average 3.1501543436719093) internal successors, (85722), 27212 states have internal predecessors, (85722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27213 states to 27213 states and 85722 transitions. [2022-03-03 18:53:33,079 INFO L78 Accepts]: Start accepts. Automaton has 27213 states and 85722 transitions. Word has length 26 [2022-03-03 18:53:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:33,079 INFO L470 AbstractCegarLoop]: Abstraction has 27213 states and 85722 transitions. [2022-03-03 18:53:33,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27213 states and 85722 transitions. [2022-03-03 18:53:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:33,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:33,125 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:33,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Ended with exit code 0 [2022-03-03 18:53:33,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2022-03-03 18:53:33,325 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:33,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1962379919, now seen corresponding path program 521 times [2022-03-03 18:53:33,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:33,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690820001] [2022-03-03 18:53:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:33,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:33,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:33,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690820001] [2022-03-03 18:53:33,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690820001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:33,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557318946] [2022-03-03 18:53:33,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:53:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:33,413 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:33,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-03-03 18:53:33,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 18:53:33,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:33,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:33,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:33,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557318946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:33,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:33,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-03-03 18:53:33,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678595969] [2022-03-03 18:53:33,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:33,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:53:33,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:53:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:53:33,621 INFO L87 Difference]: Start difference. First operand 27213 states and 85722 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:35,035 INFO L93 Difference]: Finished difference Result 28228 states and 87728 transitions. [2022-03-03 18:53:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-03 18:53:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:35,127 INFO L225 Difference]: With dead ends: 28228 [2022-03-03 18:53:35,128 INFO L226 Difference]: Without dead ends: 28220 [2022-03-03 18:53:35,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4157, Invalid=8499, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 18:53:35,129 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 222 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:35,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 231 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28220 states. [2022-03-03 18:53:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28220 to 27255. [2022-03-03 18:53:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27255 states, 27254 states have (on average 3.149262493578924) internal successors, (85830), 27254 states have internal predecessors, (85830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27255 states to 27255 states and 85830 transitions. [2022-03-03 18:53:36,026 INFO L78 Accepts]: Start accepts. Automaton has 27255 states and 85830 transitions. Word has length 26 [2022-03-03 18:53:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:36,026 INFO L470 AbstractCegarLoop]: Abstraction has 27255 states and 85830 transitions. [2022-03-03 18:53:36,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 27255 states and 85830 transitions. [2022-03-03 18:53:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:36,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:36,093 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:36,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:36,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2022-03-03 18:53:36,293 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1770915783, now seen corresponding path program 522 times [2022-03-03 18:53:36,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:36,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774063978] [2022-03-03 18:53:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:36,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:36,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:36,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774063978] [2022-03-03 18:53:36,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774063978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:36,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404741201] [2022-03-03 18:53:36,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:53:36,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:36,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:36,376 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-03-03 18:53:36,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-03 18:53:36,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:36,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:36,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404741201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:36,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:36,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 25 [2022-03-03 18:53:36,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130295802] [2022-03-03 18:53:36,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:36,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:36,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:36,611 INFO L87 Difference]: Start difference. First operand 27255 states and 85830 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:38,126 INFO L93 Difference]: Finished difference Result 30687 states and 95027 transitions. [2022-03-03 18:53:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 18:53:38,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:53:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:38,230 INFO L225 Difference]: With dead ends: 30687 [2022-03-03 18:53:38,230 INFO L226 Difference]: Without dead ends: 30660 [2022-03-03 18:53:38,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3241, Invalid=6071, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 18:53:38,231 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 291 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:38,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 293 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 18:53:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30660 states. [2022-03-03 18:53:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30660 to 28569. [2022-03-03 18:53:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28569 states, 28568 states have (on average 3.1633646037524503) internal successors, (90371), 28568 states have internal predecessors, (90371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28569 states to 28569 states and 90371 transitions. [2022-03-03 18:53:39,183 INFO L78 Accepts]: Start accepts. Automaton has 28569 states and 90371 transitions. Word has length 26 [2022-03-03 18:53:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:39,183 INFO L470 AbstractCegarLoop]: Abstraction has 28569 states and 90371 transitions. [2022-03-03 18:53:39,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 28569 states and 90371 transitions. [2022-03-03 18:53:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:39,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:39,245 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:39,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:39,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:39,445 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1306324679, now seen corresponding path program 523 times [2022-03-03 18:53:39,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:39,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088373766] [2022-03-03 18:53:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:39,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:39,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:39,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088373766] [2022-03-03 18:53:39,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088373766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:39,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009100675] [2022-03-03 18:53:39,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:53:39,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:39,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:39,523 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:39,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-03-03 18:53:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:39,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009100675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:39,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:39,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 25 [2022-03-03 18:53:39,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487454839] [2022-03-03 18:53:39,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:39,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:39,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:39,740 INFO L87 Difference]: Start difference. First operand 28569 states and 90371 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:41,384 INFO L93 Difference]: Finished difference Result 29868 states and 92929 transitions. [2022-03-03 18:53:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-03 18:53:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:53:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:41,491 INFO L225 Difference]: With dead ends: 29868 [2022-03-03 18:53:41,491 INFO L226 Difference]: Without dead ends: 29858 [2022-03-03 18:53:41,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3726 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4143, Invalid=8967, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 18:53:41,492 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 275 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:41,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 310 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29858 states. [2022-03-03 18:53:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29858 to 26993. [2022-03-03 18:53:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26993 states, 26992 states have (on average 3.147191760521636) internal successors, (84949), 26992 states have internal predecessors, (84949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 84949 transitions. [2022-03-03 18:53:42,276 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 84949 transitions. Word has length 26 [2022-03-03 18:53:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 26993 states and 84949 transitions. [2022-03-03 18:53:42,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 84949 transitions. [2022-03-03 18:53:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:42,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:42,331 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:42,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Ended with exit code 0 [2022-03-03 18:53:42,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:42,531 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1272725451, now seen corresponding path program 524 times [2022-03-03 18:53:42,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:42,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677013756] [2022-03-03 18:53:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:42,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:42,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:42,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677013756] [2022-03-03 18:53:42,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677013756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:42,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847706132] [2022-03-03 18:53:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:53:42,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:42,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:42,613 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:42,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-03-03 18:53:42,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:53:42,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:42,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:42,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847706132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:42,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:42,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 26 [2022-03-03 18:53:42,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907491807] [2022-03-03 18:53:42,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:42,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 18:53:42,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:42,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 18:53:42,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:53:42,945 INFO L87 Difference]: Start difference. First operand 26993 states and 84949 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:44,382 INFO L93 Difference]: Finished difference Result 28470 states and 88158 transitions. [2022-03-03 18:53:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 18:53:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:53:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:44,459 INFO L225 Difference]: With dead ends: 28470 [2022-03-03 18:53:44,460 INFO L226 Difference]: Without dead ends: 28450 [2022-03-03 18:53:44,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3803 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4019, Invalid=8863, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 18:53:44,461 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 265 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:44,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 310 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28450 states. [2022-03-03 18:53:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28450 to 26539. [2022-03-03 18:53:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26539 states, 26538 states have (on average 3.1459416685507575) internal successors, (83487), 26538 states have internal predecessors, (83487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26539 states to 26539 states and 83487 transitions. [2022-03-03 18:53:45,275 INFO L78 Accepts]: Start accepts. Automaton has 26539 states and 83487 transitions. Word has length 26 [2022-03-03 18:53:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:45,275 INFO L470 AbstractCegarLoop]: Abstraction has 26539 states and 83487 transitions. [2022-03-03 18:53:45,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 26539 states and 83487 transitions. [2022-03-03 18:53:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:45,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:45,330 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:45,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-03-03 18:53:45,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:45,531 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash 231149383, now seen corresponding path program 525 times [2022-03-03 18:53:45,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:45,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891193400] [2022-03-03 18:53:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:45,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:45,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891193400] [2022-03-03 18:53:45,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891193400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:45,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120156232] [2022-03-03 18:53:45,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:53:45,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:45,627 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:45,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-03-03 18:53:45,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-03 18:53:45,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:45,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:45,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120156232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:45,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:45,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2022-03-03 18:53:45,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489023908] [2022-03-03 18:53:45,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:45,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 18:53:45,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 18:53:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:53:45,866 INFO L87 Difference]: Start difference. First operand 26539 states and 83487 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:47,177 INFO L93 Difference]: Finished difference Result 27713 states and 85920 transitions. [2022-03-03 18:53:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-03 18:53:47,178 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:53:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:47,255 INFO L225 Difference]: With dead ends: 27713 [2022-03-03 18:53:47,255 INFO L226 Difference]: Without dead ends: 27701 [2022-03-03 18:53:47,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4022, Invalid=8860, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 18:53:47,257 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 254 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:47,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 185 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27701 states. [2022-03-03 18:53:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27701 to 26577. [2022-03-03 18:53:48,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26577 states, 26576 states have (on average 3.145996387718242) internal successors, (83608), 26576 states have internal predecessors, (83608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26577 states to 26577 states and 83608 transitions. [2022-03-03 18:53:48,133 INFO L78 Accepts]: Start accepts. Automaton has 26577 states and 83608 transitions. Word has length 26 [2022-03-03 18:53:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:48,133 INFO L470 AbstractCegarLoop]: Abstraction has 26577 states and 83608 transitions. [2022-03-03 18:53:48,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 26577 states and 83608 transitions. [2022-03-03 18:53:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:48,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:48,192 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:48,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Ended with exit code 0 [2022-03-03 18:53:48,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:48,393 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:48,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1866463755, now seen corresponding path program 526 times [2022-03-03 18:53:48,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:48,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346484157] [2022-03-03 18:53:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:48,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:48,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:48,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346484157] [2022-03-03 18:53:48,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346484157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:48,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445595587] [2022-03-03 18:53:48,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:53:48,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:48,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:48,467 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:48,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-03-03 18:53:48,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:53:48,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:48,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:48,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445595587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:48,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:48,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 25 [2022-03-03 18:53:48,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939390672] [2022-03-03 18:53:48,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:48,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:48,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:48,722 INFO L87 Difference]: Start difference. First operand 26577 states and 83608 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-03-03 18:53:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:50,067 INFO L93 Difference]: Finished difference Result 30369 states and 93818 transitions. [2022-03-03 18:53:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 18:53:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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 26 [2022-03-03 18:53:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:50,170 INFO L225 Difference]: With dead ends: 30369 [2022-03-03 18:53:50,170 INFO L226 Difference]: Without dead ends: 30345 [2022-03-03 18:53:50,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3114, Invalid=5816, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 18:53:50,171 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 319 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:50,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 299 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30345 states. [2022-03-03 18:53:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30345 to 27835. [2022-03-03 18:53:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27835 states, 27834 states have (on average 3.158906373500036) internal successors, (87925), 27834 states have internal predecessors, (87925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27835 states to 27835 states and 87925 transitions. [2022-03-03 18:53:51,118 INFO L78 Accepts]: Start accepts. Automaton has 27835 states and 87925 transitions. Word has length 26 [2022-03-03 18:53:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:51,118 INFO L470 AbstractCegarLoop]: Abstraction has 27835 states and 87925 transitions. [2022-03-03 18:53:51,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-03-03 18:53:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27835 states and 87925 transitions. [2022-03-03 18:53:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 18:53:51,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:51,181 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:51,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Ended with exit code 0 [2022-03-03 18:53:51,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2022-03-03 18:53:51,381 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1401872651, now seen corresponding path program 527 times [2022-03-03 18:53:51,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:51,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566775957] [2022-03-03 18:53:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:51,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:51,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:51,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566775957] [2022-03-03 18:53:51,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566775957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:51,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838864826] [2022-03-03 18:53:51,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:53:51,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:51,453 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 18:53:51,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-03-03 18:53:51,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 18:53:51,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:53:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:51,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:53:51,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838864826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:51,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:51,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 25 [2022-03-03 18:53:51,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30604304] [2022-03-03 18:53:51,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:51,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 18:53:51,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 18:53:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-03-03 18:53:51,677 INFO L87 Difference]: Start difference. First operand 27835 states and 87925 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:53,386 INFO L93 Difference]: Finished difference Result 29357 states and 91107 transitions. [2022-03-03 18:53:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-03 18:53:53,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 18:53:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:53,485 INFO L225 Difference]: With dead ends: 29357 [2022-03-03 18:53:53,485 INFO L226 Difference]: Without dead ends: 29349 [2022-03-03 18:53:53,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4284 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4352, Invalid=9928, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 18:53:53,486 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 290 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:53,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 266 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29349 states. Received shutdown request... [2022-03-03 18:53:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29349 to 26847. [2022-03-03 18:53:54,186 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 18:53:54,187 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 [2022-03-03 18:53:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26847 states, 26846 states have (on average 3.1492959845042092) internal successors, (84546), 26846 states have internal predecessors, (84546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:54,220 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 18:53:54,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Ended with exit code 0 [2022-03-03 18:53:54,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2022-03-03 18:53:54,421 WARN L594 AbstractCegarLoop]: Verification canceled: while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). [2022-03-03 18:53:54,423 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 18:53:54,423 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 18:53:54,426 INFO L732 BasicCegarLoop]: Path program histogram: [527, 6, 6, 2] [2022-03-03 18:53:54,429 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 18:53:54,429 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 18:53:54,431 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 06:53:54 BasicIcfg [2022-03-03 18:53:54,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 18:53:54,432 INFO L158 Benchmark]: Toolchain (without parser) took 791020.10ms. Allocated memory was 184.5MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 142.1MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-03-03 18:53:54,432 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 18:53:54,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.93ms. Allocated memory is still 184.5MB. Free memory was 142.1MB in the beginning and 140.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-03 18:53:54,432 INFO L158 Benchmark]: Boogie Preprocessor took 15.97ms. Allocated memory is still 184.5MB. Free memory was 140.5MB in the beginning and 139.5MB in the end (delta: 924.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 18:53:54,432 INFO L158 Benchmark]: RCFGBuilder took 255.32ms. Allocated memory is still 184.5MB. Free memory was 139.5MB in the beginning and 129.8MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 18:53:54,436 INFO L158 Benchmark]: TraceAbstraction took 790713.29ms. Allocated memory was 184.5MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 129.3MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-03-03 18:53:54,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 143.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.93ms. Allocated memory is still 184.5MB. Free memory was 142.1MB in the beginning and 140.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.97ms. Allocated memory is still 184.5MB. Free memory was 140.5MB in the beginning and 139.5MB in the end (delta: 924.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 255.32ms. Allocated memory is still 184.5MB. Free memory was 139.5MB in the beginning and 129.8MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 790713.29ms. Allocated memory was 184.5MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 129.3MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 790.6s, OverallIterations: 541, TraceHistogramMax: 7, PathProgramHistogramMax: 527, EmptinessCheckTime: 8.8s, AutomataDifference: 315.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 84372 SdHoareTripleChecker+Valid, 135.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 84372 mSDsluCounter, 199877 SdHoareTripleChecker+Invalid, 113.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 291454 mSDsCounter, 15827 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 342618 IncrementalHoareTripleChecker+Invalid, 358445 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15827 mSolverCounterUnsat, 15530 mSDtfsCounter, 342618 mSolverCounterSat, 1.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 41936 GetRequests, 16350 SyntacticMatches, 1736 SemanticMatches, 23850 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384157 ImplicationChecksByTransitivity, 246.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30268occurred in iteration=523, InterpolantAutomatonStates: 18415, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 120.8s AutomataMinimizationTime, 541 MinimizatonAttempts, 475000 StatesRemovedByMinimization, 538 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 220.1s InterpolantComputationTime, 23348 NumberOfCodeBlocks, 23348 NumberOfCodeBlocksAsserted, 2062 NumberOfCheckSat, 33345 ConstructedInterpolants, 0 QuantifiedInterpolants, 318375 SizeOfPredicates, 1631 NumberOfNonLiveVariables, 49916 ConjunctsInSsa, 12736 ConjunctsInUnsatCore, 1601 InterpolantComputations, 11 PerfectInterpolantSequences, 10712/41793 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