/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:13:13,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:13:13,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:13:13,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:13:13,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:13:13,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:13:13,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:13:13,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 17:13:13,426 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:13:13,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:13:13,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:13:13,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:13:13,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:13:13,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:13:13,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:13:13,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:13:13,430 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:13:13,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:13:13,431 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:13:13,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:13:13,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:13:13,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:13:13,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:13:13,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:13:13,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:13:13,432 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:13:13,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:13:13,432 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:13:13,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:13:13,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:13:13,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:13:13,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:13:13,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:13:13,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:13:13,435 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:13:13,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:13:13,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:13:13,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:13:13,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:13:13,689 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:13:13,690 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:13:13,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl [2022-01-18 17:13:13,691 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl' [2022-01-18 17:13:13,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:13:13,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:13:13,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:13:13,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:13:13,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:13:13,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,735 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:13:13,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:13:13,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:13:13,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:13:13,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:13:13,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:13:13,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:13:13,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:13:13,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:13:13,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/1) ... [2022-01-18 17:13:13,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:13:13,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:13,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 17:13:13,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 17:13:13,809 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:13:13,809 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:13:13,809 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:13:13,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:13:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:13:13,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:13:13,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:13:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:13:13,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:13:13,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 17:13:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 17:13:13,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 17:13:13,811 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 17:13:13,841 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:13:13,842 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:13:13,908 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:13:13,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:13:13,931 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:13:13,933 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:13:13 BoogieIcfgContainer [2022-01-18 17:13:13,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:13:13,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:13:13,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:13:13,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:13:13,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:13:13" (1/2) ... [2022-01-18 17:13:13,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7d50a and model type max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:13:13, skipping insertion in model container [2022-01-18 17:13:13,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:13:13" (2/2) ... [2022-01-18 17:13:13,940 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array.wvr.bpl [2022-01-18 17:13:13,944 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:13:13,944 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:13:13,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:13:13,944 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:13:13,999 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 17:13:14,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:13:14,069 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 17:13:14,070 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 17:13:14,078 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 17:13:14,116 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:14,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 17:13:14,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:14,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:14,127 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:14,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-01-18 17:13:14,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204293398] [2022-01-18 17:13:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:14,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:14,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:14,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204293398] [2022-01-18 17:13:14,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204293398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:13:14,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:13:14,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 17:13:14,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814288967] [2022-01-18 17:13:14,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:13:14,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:13:14,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:13:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:13:14,278 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:14,335 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-01-18 17:13:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:13:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 17:13:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:14,344 INFO L225 Difference]: With dead ends: 217 [2022-01-18 17:13:14,344 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 17:13:14,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:13:14,347 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:14,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:13:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 17:13:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-01-18 17:13:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-01-18 17:13:14,424 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-01-18 17:13:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:14,425 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-01-18 17:13:14,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-01-18 17:13:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:13:14,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:14,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:14,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:13:14,428 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-01-18 17:13:14,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015431242] [2022-01-18 17:13:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:14,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:14,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:14,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015431242] [2022-01-18 17:13:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015431242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:13:14,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:13:14,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:13:14,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158160870] [2022-01-18 17:13:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:13:14,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:13:14,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:13:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:13:14,470 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2022-01-18 17:13:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:14,526 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-01-18 17:13:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:13:14,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 20 [2022-01-18 17:13:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:14,528 INFO L225 Difference]: With dead ends: 158 [2022-01-18 17:13:14,528 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 17:13:14,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:13:14,529 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:14,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:13:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 17:13:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-18 17:13:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 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) [2022-01-18 17:13:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 17:13:14,548 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-01-18 17:13:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:14,549 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 17:13:14,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2022-01-18 17:13:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 17:13:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:13:14,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:14,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:14,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 17:13:14,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:14,551 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-01-18 17:13:14,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:14,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181474467] [2022-01-18 17:13:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:14,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:14,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:14,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181474467] [2022-01-18 17:13:14,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181474467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:13:14,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:13:14,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:13:14,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915421104] [2022-01-18 17:13:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:13:14,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:13:14,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:13:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:13:14,609 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2022-01-18 17:13:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:14,661 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-01-18 17:13:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:13:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 20 [2022-01-18 17:13:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:14,663 INFO L225 Difference]: With dead ends: 183 [2022-01-18 17:13:14,663 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 17:13:14,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:13:14,664 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:14,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:13:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 17:13:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-18 17:13:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 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) [2022-01-18 17:13:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 17:13:14,673 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 17:13:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:14,675 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 17:13:14,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2022-01-18 17:13:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 17:13:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:13:14,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:14,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:14,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 17:13:14,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-01-18 17:13:14,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:14,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295039550] [2022-01-18 17:13:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:14,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:14,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295039550] [2022-01-18 17:13:14,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295039550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:14,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893027602] [2022-01-18 17:13:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:14,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:14,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:14,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 17:13:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:15,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 17:13:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:15,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-01-18 17:13:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:15,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:15,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:15,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 17:13:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:15,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893027602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:15,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:15,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 17:13:15,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097065519] [2022-01-18 17:13:15,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:15,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:13:15,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:13:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:13:15,728 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 17:13:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:16,058 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 17:13:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:13:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 22 [2022-01-18 17:13:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:16,061 INFO L225 Difference]: With dead ends: 366 [2022-01-18 17:13:16,061 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 17:13:16,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:13:16,062 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:16,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 61 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 17:13:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 17:13:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 17:13:16,080 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 17:13:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:16,080 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 17:13:16,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 17:13:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 17:13:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:13:16,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:16,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:16,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 17:13:16,294 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 [2022-01-18 17:13:16,294 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-01-18 17:13:16,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:16,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579977083] [2022-01-18 17:13:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:16,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:16,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579977083] [2022-01-18 17:13:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579977083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933241647] [2022-01-18 17:13:16,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:13:16,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:16,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:16,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:16,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 17:13:16,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:13:16,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:16,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:13:16,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:16,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:16,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 17:13:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:17,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:17,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:17,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 17:13:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:17,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933241647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:17,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:17,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-01-18 17:13:17,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964688152] [2022-01-18 17:13:17,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:17,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:13:17,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:13:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:13:17,685 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:18,481 INFO L93 Difference]: Finished difference Result 486 states and 1409 transitions. [2022-01-18 17:13:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:13:18,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 22 [2022-01-18 17:13:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:18,484 INFO L225 Difference]: With dead ends: 486 [2022-01-18 17:13:18,484 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 17:13:18,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:13:18,485 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:18,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 94 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 17:13:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 229. [2022-01-18 17:13:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 17:13:18,498 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 17:13:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:18,498 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 17:13:18,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 17:13:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:13:18,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:18,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:18,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:18,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:18,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:18,701 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-01-18 17:13:18,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:18,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919648106] [2022-01-18 17:13:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:18,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:18,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919648106] [2022-01-18 17:13:18,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919648106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800956960] [2022-01-18 17:13:18,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:13:18,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:18,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:18,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 17:13:18,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:13:18,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:13:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:19,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-01-18 17:13:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:19,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:19,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:19,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 17:13:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:19,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800956960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:19,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:19,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 17:13:19,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735680539] [2022-01-18 17:13:19,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:13:19,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:13:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:13:19,288 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2022-01-18 17:13:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:19,571 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-01-18 17:13:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:13:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 22 [2022-01-18 17:13:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:19,573 INFO L225 Difference]: With dead ends: 418 [2022-01-18 17:13:19,573 INFO L226 Difference]: Without dead ends: 403 [2022-01-18 17:13:19,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:13:19,574 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:19,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 98 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:13:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-18 17:13:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-01-18 17:13:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 17:13:19,580 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 17:13:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:19,580 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 17:13:19,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2022-01-18 17:13:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 17:13:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:13:19,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:19,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:19,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:19,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:19,791 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-01-18 17:13:19,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:19,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135093142] [2022-01-18 17:13:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:19,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:19,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:19,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135093142] [2022-01-18 17:13:19,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135093142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:19,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738383617] [2022-01-18 17:13:19,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:13:19,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:19,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:19,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:19,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 17:13:19,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:13:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 17:13:19,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:20,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:20,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 17:13:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:20,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:20,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:20,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 17:13:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738383617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:20,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:20,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 17:13:20,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536369834] [2022-01-18 17:13:20,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:20,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:13:20,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:13:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:13:20,561 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 17:13:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:20,796 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-01-18 17:13:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:13:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 22 [2022-01-18 17:13:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:20,798 INFO L225 Difference]: With dead ends: 374 [2022-01-18 17:13:20,798 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 17:13:20,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:13:20,799 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:20,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 122 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 283 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-01-18 17:13:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 17:13:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-01-18 17:13:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-01-18 17:13:20,804 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-01-18 17:13:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:20,804 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-01-18 17:13:20,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 17:13:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-01-18 17:13:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:13:20,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:20,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:20,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:21,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:21,015 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-01-18 17:13:21,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:21,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077280499] [2022-01-18 17:13:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:21,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:21,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077280499] [2022-01-18 17:13:21,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077280499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774300802] [2022-01-18 17:13:21,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:13:21,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:21,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:21,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:21,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 17:13:21,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:13:21,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:21,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 17:13:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:21,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:21,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 17:13:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:21,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:21,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:21,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 17:13:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774300802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:22,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:22,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-01-18 17:13:22,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915676737] [2022-01-18 17:13:22,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:13:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:13:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:13:22,107 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:26,246 INFO L93 Difference]: Finished difference Result 1141 states and 3378 transitions. [2022-01-18 17:13:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 17:13:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 22 [2022-01-18 17:13:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:26,251 INFO L225 Difference]: With dead ends: 1141 [2022-01-18 17:13:26,251 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 17:13:26,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1386, Invalid=5420, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:13:26,253 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 532 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:26,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 286 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 877 Invalid, 0 Unknown, 215 Unchecked, 0.5s Time] [2022-01-18 17:13:26,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 17:13:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 255. [2022-01-18 17:13:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0) internal successors, (762), 254 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 762 transitions. [2022-01-18 17:13:26,261 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 762 transitions. Word has length 22 [2022-01-18 17:13:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:26,262 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 762 transitions. [2022-01-18 17:13:26,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 762 transitions. [2022-01-18 17:13:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:13:26,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:26,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:26,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:26,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:26,478 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:26,478 INFO L85 PathProgramCache]: Analyzing trace with hash 151290546, now seen corresponding path program 6 times [2022-01-18 17:13:26,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:26,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39873890] [2022-01-18 17:13:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:26,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:26,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39873890] [2022-01-18 17:13:26,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39873890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551366178] [2022-01-18 17:13:26,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:13:26,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:26,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:26,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 17:13:26,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:13:26,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:13:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:26,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:26,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 17:13:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:27,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:27,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:13:27,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 17:13:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:27,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551366178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:27,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:27,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-18 17:13:27,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133877928] [2022-01-18 17:13:27,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:27,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:13:27,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:13:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:13:27,284 INFO L87 Difference]: Start difference. First operand 255 states and 762 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:28,080 INFO L93 Difference]: Finished difference Result 597 states and 1769 transitions. [2022-01-18 17:13:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:13:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 22 [2022-01-18 17:13:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:28,083 INFO L225 Difference]: With dead ends: 597 [2022-01-18 17:13:28,083 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 17:13:28,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:13:28,083 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:28,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 121 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 17:13:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 258. [2022-01-18 17:13:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-01-18 17:13:28,089 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-01-18 17:13:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:28,090 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-01-18 17:13:28,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-01-18 17:13:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:28,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:28,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:28,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:28,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:28,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-01-18 17:13:28,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:28,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034269053] [2022-01-18 17:13:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:28,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:28,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034269053] [2022-01-18 17:13:28,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034269053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669329579] [2022-01-18 17:13:28,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:13:28,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:28,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:28,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:28,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 17:13:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:28,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:28,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669329579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:28,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:28,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:13:28,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515590627] [2022-01-18 17:13:28,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:28,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:13:28,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:28,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:13:28,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:13:28,551 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 17:13:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:29,325 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-01-18 17:13:29,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:13:29,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 24 [2022-01-18 17:13:29,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:29,330 INFO L225 Difference]: With dead ends: 1123 [2022-01-18 17:13:29,330 INFO L226 Difference]: Without dead ends: 1123 [2022-01-18 17:13:29,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:13:29,331 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:29,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 219 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:13:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-01-18 17:13:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-01-18 17:13:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-01-18 17:13:29,341 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-01-18 17:13:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:29,341 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-01-18 17:13:29,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 17:13:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-01-18 17:13:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:29,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:29,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:29,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:29,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:29,557 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:29,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-01-18 17:13:29,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:29,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907004216] [2022-01-18 17:13:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:29,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:29,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907004216] [2022-01-18 17:13:29,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907004216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939153497] [2022-01-18 17:13:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:13:29,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:29,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:29,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:29,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 17:13:29,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:13:29,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:29,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939153497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:29,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:29,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:13:29,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559975891] [2022-01-18 17:13:29,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:29,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:13:29,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:13:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:13:29,833 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:13:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:31,563 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-01-18 17:13:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 17:13:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-01-18 17:13:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:31,568 INFO L225 Difference]: With dead ends: 1814 [2022-01-18 17:13:31,568 INFO L226 Difference]: Without dead ends: 1814 [2022-01-18 17:13:31,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:13:31,572 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 444 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:31,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 326 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:13:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-01-18 17:13:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-01-18 17:13:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 17:13:31,584 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 17:13:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:31,584 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 17:13:31,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:13:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 17:13:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:31,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:31,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:31,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:31,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 17:13:31,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-01-18 17:13:31,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:31,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515878790] [2022-01-18 17:13:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:31,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:31,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:31,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515878790] [2022-01-18 17:13:31,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515878790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:31,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657308057] [2022-01-18 17:13:31,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:13:31,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:31,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:31,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 17:13:31,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:13:31,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:31,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:32,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657308057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:32,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:32,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:13:32,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793345559] [2022-01-18 17:13:32,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:32,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:13:32,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:13:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:13:32,074 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:13:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:32,967 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 17:13:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:13:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 24 [2022-01-18 17:13:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:32,972 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 17:13:32,972 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 17:13:32,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:13:32,973 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 390 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:32,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 264 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:13:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 17:13:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 17:13:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 17:13:32,983 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 17:13:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:32,983 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 17:13:32,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-01-18 17:13:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 17:13:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:32,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:32,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:33,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:33,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:33,200 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-01-18 17:13:33,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:33,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360091670] [2022-01-18 17:13:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:33,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:33,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:33,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360091670] [2022-01-18 17:13:33,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360091670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:33,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756066311] [2022-01-18 17:13:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:33,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:33,259 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:33,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 17:13:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:13:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:33,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:33,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756066311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:33,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:33,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:13:33,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843377739] [2022-01-18 17:13:33,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:33,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:13:33,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:13:33,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:13:33,412 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 17:13:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:33,544 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 17:13:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:13:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 [2022-01-18 17:13:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:33,547 INFO L225 Difference]: With dead ends: 685 [2022-01-18 17:13:33,547 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 17:13:33,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:13:33,548 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:33,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 46 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:13:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 17:13:33,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 17:13:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 17:13:33,559 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 17:13:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:33,560 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 17:13:33,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 17:13:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 17:13:33,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:33,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:33,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:33,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:33,791 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,SelfDestructingSolverStorable12 [2022-01-18 17:13:33,792 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:33,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-01-18 17:13:33,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487184862] [2022-01-18 17:13:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:33,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:33,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487184862] [2022-01-18 17:13:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487184862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072006469] [2022-01-18 17:13:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:13:33,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:33,843 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:33,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 17:13:33,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:13:33,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:33,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:33,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072006469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:33,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:33,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 17:13:33,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521321820] [2022-01-18 17:13:33,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:33,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:13:33,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:13:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:13:33,996 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:34,311 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 17:13:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:13:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:13:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:34,316 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 17:13:34,316 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 17:13:34,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:13:34,316 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 278 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:34,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 115 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 17:13:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 17:13:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 17:13:34,334 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 17:13:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:34,334 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 17:13:34,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 17:13:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:34,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:34,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:34,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:34,536 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,SelfDestructingSolverStorable13 [2022-01-18 17:13:34,536 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-01-18 17:13:34,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:34,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257557298] [2022-01-18 17:13:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:34,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:34,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:34,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257557298] [2022-01-18 17:13:34,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257557298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:34,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329704963] [2022-01-18 17:13:34,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:13:34,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:34,572 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:34,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 17:13:34,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:13:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:34,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:13:34,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:34,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329704963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:34,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:34,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:13:34,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66056791] [2022-01-18 17:13:34,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:34,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:13:34,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:13:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:13:34,707 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 17:13:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:34,904 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 17:13:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:13:34,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 [2022-01-18 17:13:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:34,908 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 17:13:34,908 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 17:13:34,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:13:34,909 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 150 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:34,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:13:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 17:13:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 17:13:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 17:13:34,928 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 17:13:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:34,928 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 17:13:34,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 17:13:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 17:13:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:34,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:34,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:34,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:35,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 17:13:35,146 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-01-18 17:13:35,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:35,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323691282] [2022-01-18 17:13:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:35,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:35,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:35,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323691282] [2022-01-18 17:13:35,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323691282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:35,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558317477] [2022-01-18 17:13:35,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:13:35,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:35,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:35,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 17:13:35,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:13:35,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:35,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:35,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:35,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558317477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:35,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:35,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:13:35,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629445387] [2022-01-18 17:13:35,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:35,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:13:35,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:13:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:13:35,397 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:35,873 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 17:13:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:13:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2022-01-18 17:13:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:35,881 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 17:13:35,881 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 17:13:35,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:13:35,882 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 268 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:35,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 181 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 17:13:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 17:13:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 17:13:35,908 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 17:13:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 17:13:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 17:13:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:35,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:35,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:35,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:36,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 17:13:36,126 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:36,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-01-18 17:13:36,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:36,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126127945] [2022-01-18 17:13:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:36,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:36,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:36,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126127945] [2022-01-18 17:13:36,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126127945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85020452] [2022-01-18 17:13:36,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:13:36,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:36,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:36,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:36,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 17:13:36,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:13:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:36,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:36,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:36,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:36,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85020452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:36,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:36,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:13:36,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721260724] [2022-01-18 17:13:36,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:36,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:13:36,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:13:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:13:36,386 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:36,811 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 17:13:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:13:36,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2022-01-18 17:13:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:36,818 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 17:13:36,818 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 17:13:36,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:13:36,819 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 224 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:36,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 199 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 17:13:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 17:13:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 17:13:36,840 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 17:13:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:36,840 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 17:13:36,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 17:13:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:36,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:36,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:36,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:37,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:37,055 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:37,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:37,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-01-18 17:13:37,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:37,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396348248] [2022-01-18 17:13:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:37,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:37,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:37,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396348248] [2022-01-18 17:13:37,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396348248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:37,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102609400] [2022-01-18 17:13:37,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:13:37,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:37,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:37,092 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:37,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 17:13:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:37,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:37,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:37,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:37,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102609400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:37,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:37,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 17:13:37,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877345385] [2022-01-18 17:13:37,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:37,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:13:37,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:13:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:13:37,245 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:37,506 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 17:13:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:13:37,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 24 [2022-01-18 17:13:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:37,510 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 17:13:37,510 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 17:13:37,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:13:37,511 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 249 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:37,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 114 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:13:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 17:13:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 17:13:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 17:13:37,528 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 17:13:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:37,528 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 17:13:37,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 17:13:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:37,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:37,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:37,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:37,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 17:13:37,744 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-01-18 17:13:37,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:37,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292844860] [2022-01-18 17:13:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:37,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:37,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292844860] [2022-01-18 17:13:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292844860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366645543] [2022-01-18 17:13:37,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:13:37,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:37,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:37,782 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:37,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 17:13:37,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:13:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:37,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:37,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366645543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:37,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:37,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:13:37,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693528232] [2022-01-18 17:13:37,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:37,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:13:37,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:13:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:13:37,939 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:38,422 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 17:13:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:13:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2022-01-18 17:13:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:38,426 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 17:13:38,426 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 17:13:38,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:13:38,427 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 347 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 136 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 17:13:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 17:13:38,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 17:13:38,450 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 17:13:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:38,450 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 17:13:38,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 17:13:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:38,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:38,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:38,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-18 17:13:38,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:38,666 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-01-18 17:13:38,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:38,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370367125] [2022-01-18 17:13:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:38,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:38,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370367125] [2022-01-18 17:13:38,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370367125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364010047] [2022-01-18 17:13:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:13:38,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:38,715 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:38,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 17:13:38,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:13:38,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:38,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:38,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364010047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:38,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:38,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:13:38,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639160734] [2022-01-18 17:13:38,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:38,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:13:38,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:38,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:13:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:13:38,915 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:39,751 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 17:13:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 17:13:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-01-18 17:13:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:39,758 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 17:13:39,758 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 17:13:39,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:13:39,760 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 382 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:39,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 293 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:13:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 17:13:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 17:13:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 17:13:39,825 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 17:13:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:39,825 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 17:13:39,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 17:13:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:39,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:39,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:39,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:40,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:40,040 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-01-18 17:13:40,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:40,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316606489] [2022-01-18 17:13:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:40,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:40,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316606489] [2022-01-18 17:13:40,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316606489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852362015] [2022-01-18 17:13:40,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:13:40,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:40,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:40,086 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:40,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 17:13:40,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:13:40,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:40,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:40,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852362015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:40,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:40,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:13:40,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068272832] [2022-01-18 17:13:40,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:40,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:13:40,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:13:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:13:40,280 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:41,123 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 17:13:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 17:13:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-01-18 17:13:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:41,130 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 17:13:41,130 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 17:13:41,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:13:41,132 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 430 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:41,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 280 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:13:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 17:13:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 17:13:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 17:13:41,164 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 17:13:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:41,164 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 17:13:41,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 17:13:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:41,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:41,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:41,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:41,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:41,386 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:41,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-01-18 17:13:41,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:41,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225944600] [2022-01-18 17:13:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:41,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:41,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:41,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225944600] [2022-01-18 17:13:41,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225944600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:41,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267199013] [2022-01-18 17:13:41,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:13:41,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:41,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:41,418 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:41,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 17:13:41,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:13:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:41,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:13:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:41,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:41,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267199013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:41,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:41,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 17:13:41,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449149297] [2022-01-18 17:13:41,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:41,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:13:41,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:13:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:13:41,530 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:41,612 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 17:13:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:13:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 [2022-01-18 17:13:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:41,615 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 17:13:41,615 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 17:13:41,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:13:41,616 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:41,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 51 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:13:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 17:13:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 17:13:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 17:13:41,632 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 17:13:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:41,632 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 17:13:41,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 17:13:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:41,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:41,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:41,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:41,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:41,851 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-01-18 17:13:41,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:41,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227255778] [2022-01-18 17:13:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:41,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:41,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227255778] [2022-01-18 17:13:41,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227255778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270649492] [2022-01-18 17:13:41,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:13:41,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:41,888 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:41,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 17:13:41,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:13:41,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:41,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:41,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:42,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270649492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:42,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:42,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:13:42,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570294066] [2022-01-18 17:13:42,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:42,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:13:42,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:13:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:13:42,044 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 17:13:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:42,312 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 17:13:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:13:42,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 [2022-01-18 17:13:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:42,329 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 17:13:42,329 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 17:13:42,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:13:42,330 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:42,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 170 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:13:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 17:13:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 17:13:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 17:13:42,360 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 17:13:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:42,360 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 17:13:42,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 17:13:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 17:13:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:42,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:42,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:42,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:42,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 17:13:42,579 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-01-18 17:13:42,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:42,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699129047] [2022-01-18 17:13:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:42,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:42,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:42,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699129047] [2022-01-18 17:13:42,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699129047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:42,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895339307] [2022-01-18 17:13:42,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:13:42,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:42,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:42,612 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:42,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 17:13:42,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:13:42,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:42,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:42,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:42,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895339307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:42,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:42,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:13:42,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969602165] [2022-01-18 17:13:42,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:42,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:13:42,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:13:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:13:42,736 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 17:13:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:43,054 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 17:13:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:13:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 [2022-01-18 17:13:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:43,059 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 17:13:43,059 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 17:13:43,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:13:43,064 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 196 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:43,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 105 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:13:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 17:13:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 17:13:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 17:13:43,088 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 17:13:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:43,088 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 17:13:43,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 17:13:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 17:13:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:43,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:43,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:43,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:43,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 17:13:43,305 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:43,306 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-01-18 17:13:43,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:43,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533953857] [2022-01-18 17:13:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:43,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:43,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533953857] [2022-01-18 17:13:43,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533953857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470147130] [2022-01-18 17:13:43,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:13:43,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:43,352 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:43,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 17:13:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:43,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:43,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470147130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:43,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:43,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 17:13:43,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901599918] [2022-01-18 17:13:43,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:43,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:13:43,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:13:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:13:43,507 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:43,780 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 17:13:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:13:43,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-01-18 17:13:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:43,784 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 17:13:43,784 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 17:13:43,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:13:43,785 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:43,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 119 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 17:13:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 17:13:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 17:13:43,805 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 17:13:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:43,805 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 17:13:43,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 17:13:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:43,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:43,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:43,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:44,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:44,022 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-01-18 17:13:44,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:44,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179944787] [2022-01-18 17:13:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:44,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:44,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:44,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179944787] [2022-01-18 17:13:44,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179944787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530015851] [2022-01-18 17:13:44,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:13:44,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:44,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:44,052 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:44,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 17:13:44,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:13:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:44,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:44,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:44,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530015851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:44,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:44,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:13:44,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771406307] [2022-01-18 17:13:44,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:44,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:13:44,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:13:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:13:44,163 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 17:13:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:44,355 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 17:13:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:13:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 [2022-01-18 17:13:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:44,359 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 17:13:44,359 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 17:13:44,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:13:44,360 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 213 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:44,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 96 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:13:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 17:13:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 17:13:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 17:13:44,387 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 17:13:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:44,388 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 17:13:44,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 17:13:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 17:13:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:44,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:44,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:44,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:44,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:44,604 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-01-18 17:13:44,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:44,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036616722] [2022-01-18 17:13:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:44,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:44,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:44,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036616722] [2022-01-18 17:13:44,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036616722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:44,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999672554] [2022-01-18 17:13:44,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:13:44,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:44,637 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:44,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 17:13:44,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:13:44,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:44,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:44,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:44,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999672554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:44,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:44,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:13:44,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101059651] [2022-01-18 17:13:44,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:13:44,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:44,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:13:44,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:13:44,744 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 17:13:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:45,015 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 17:13:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:13:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 [2022-01-18 17:13:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:45,019 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 17:13:45,019 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 17:13:45,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:13:45,020 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 164 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:45,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 163 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 17:13:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 17:13:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 17:13:45,040 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 17:13:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:45,041 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 17:13:45,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 17:13:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 17:13:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:45,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:45,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:45,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:45,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 17:13:45,258 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-01-18 17:13:45,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:45,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075329222] [2022-01-18 17:13:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:45,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:45,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075329222] [2022-01-18 17:13:45,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075329222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614164684] [2022-01-18 17:13:45,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:13:45,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:45,314 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:45,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 17:13:45,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:13:45,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:45,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:45,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614164684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:45,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:45,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:13:45,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138566912] [2022-01-18 17:13:45,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:45,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:13:45,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:13:45,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:13:45,492 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:13:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:46,302 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 17:13:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:13:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 17:13:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:46,309 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 17:13:46,309 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 17:13:46,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:13:46,311 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 475 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:46,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 213 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:13:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 17:13:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 17:13:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 17:13:46,348 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 17:13:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:46,348 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 17:13:46,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:13:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 17:13:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:46,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:46,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:46,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:46,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 17:13:46,566 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:46,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-01-18 17:13:46,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:46,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679228329] [2022-01-18 17:13:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:46,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:46,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679228329] [2022-01-18 17:13:46,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679228329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894091546] [2022-01-18 17:13:46,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:13:46,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:46,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:46,604 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:46,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 17:13:46,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:13:46,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:46,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:46,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894091546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:46,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:46,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:13:46,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293766966] [2022-01-18 17:13:46,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:46,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:13:46,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:46,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:13:46,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:13:46,831 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:13:47,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:47,552 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 17:13:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:13:47,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 17:13:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:47,559 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 17:13:47,560 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 17:13:47,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:13:47,564 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 485 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:47,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 183 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:13:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 17:13:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 17:13:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 17:13:47,639 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 17:13:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:47,639 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 17:13:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 17:13:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 17:13:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:47,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:47,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:47,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:47,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 17:13:47,863 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-01-18 17:13:47,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:47,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072981341] [2022-01-18 17:13:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:47,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:47,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:47,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072981341] [2022-01-18 17:13:47,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072981341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:47,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704892567] [2022-01-18 17:13:47,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:13:47,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:47,918 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:47,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 17:13:47,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:13:47,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:47,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:48,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:48,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704892567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:48,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:48,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:13:48,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962263196] [2022-01-18 17:13:48,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:48,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:13:48,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:13:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:13:48,088 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 17:13:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:48,733 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 17:13:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:13:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 17:13:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:48,740 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 17:13:48,740 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 17:13:48,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:13:48,743 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 335 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:48,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 177 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:13:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 17:13:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 17:13:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 17:13:48,790 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 17:13:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:48,790 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 17:13:48,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 17:13:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 17:13:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:48,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:48,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:48,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:49,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:49,008 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-01-18 17:13:49,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548176763] [2022-01-18 17:13:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:49,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:49,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:49,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548176763] [2022-01-18 17:13:49,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548176763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:49,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641571316] [2022-01-18 17:13:49,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:13:49,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:49,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:49,055 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:49,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 17:13:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:49,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:49,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:49,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641571316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:49,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:49,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:13:49,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458367170] [2022-01-18 17:13:49,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:49,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:13:49,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:13:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:13:49,172 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 17:13:49,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:49,559 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 17:13:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:13:49,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 17:13:49,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:49,565 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 17:13:49,565 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 17:13:49,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:13:49,567 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 386 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:49,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 178 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 17:13:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 17:13:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:13:49,601 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:13:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:49,601 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:13:49,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 17:13:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:13:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:49,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:49,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:49,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:49,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:49,813 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-01-18 17:13:49,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:49,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525887722] [2022-01-18 17:13:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:49,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:49,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:49,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525887722] [2022-01-18 17:13:49,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525887722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:49,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206388985] [2022-01-18 17:13:49,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:13:49,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:49,880 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:49,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 17:13:49,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:13:49,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:49,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:50,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206388985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:50,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:50,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:13:50,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666668384] [2022-01-18 17:13:50,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:50,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:13:50,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:13:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:13:50,071 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:50,692 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 17:13:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:13:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-01-18 17:13:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:50,699 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 17:13:50,699 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 17:13:50,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 17:13:50,700 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 420 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:50,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 234 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:13:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 17:13:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 17:13:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 17:13:50,737 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 17:13:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:50,737 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 17:13:50,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 17:13:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:50,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:50,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:50,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:50,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:50,955 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:50,955 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-01-18 17:13:50,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:50,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448280385] [2022-01-18 17:13:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:50,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:50,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:50,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448280385] [2022-01-18 17:13:50,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448280385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:50,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733739031] [2022-01-18 17:13:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:13:50,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:50,984 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:50,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 17:13:51,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:13:51,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:51,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:13:51,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733739031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:51,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:51,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:13:51,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681330198] [2022-01-18 17:13:51,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:51,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:13:51,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:13:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:13:51,105 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:51,672 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 17:13:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:13:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 24 [2022-01-18 17:13:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:51,683 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 17:13:51,683 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 17:13:51,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:13:51,683 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 381 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:51,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 185 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 17:13:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 17:13:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:13:51,714 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:13:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:51,714 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:13:51,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:13:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:51,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:51,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:51,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:51,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 17:13:51,920 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-01-18 17:13:51,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:51,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154318489] [2022-01-18 17:13:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:51,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:51,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:51,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154318489] [2022-01-18 17:13:51,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154318489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:51,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585181338] [2022-01-18 17:13:51,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:13:51,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:51,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:51,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 17:13:51,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:13:51,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:51,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:52,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585181338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:52,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:52,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:13:52,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397249057] [2022-01-18 17:13:52,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:52,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:13:52,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:13:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:13:52,123 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:52,540 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 17:13:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:13:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-01-18 17:13:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:52,546 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 17:13:52,546 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 17:13:52,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:13:52,547 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:52,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 153 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 17:13:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 17:13:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 17:13:52,578 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 17:13:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:52,578 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 17:13:52,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 17:13:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:52,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:52,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:52,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:52,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:52,796 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-01-18 17:13:52,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:52,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354638293] [2022-01-18 17:13:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:52,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:52,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354638293] [2022-01-18 17:13:52,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354638293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:52,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542469568] [2022-01-18 17:13:52,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:13:52,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:52,822 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:52,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 17:13:52,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:13:52,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:52,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:52,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:52,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:52,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542469568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:52,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:52,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:13:52,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865239886] [2022-01-18 17:13:52,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:52,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:13:52,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:13:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:13:52,918 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:53,241 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 17:13:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:13:53,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-01-18 17:13:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:53,246 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 17:13:53,246 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 17:13:53,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:13:53,247 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 311 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:53,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 128 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 17:13:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 17:13:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 17:13:53,294 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 17:13:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:53,295 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 17:13:53,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 17:13:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:53,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:53,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:53,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:53,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:53,517 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-01-18 17:13:53,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:53,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263363402] [2022-01-18 17:13:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:53,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:53,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263363402] [2022-01-18 17:13:53,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263363402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541457036] [2022-01-18 17:13:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:13:53,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:53,543 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:53,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 17:13:53,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:13:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:53,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:53,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541457036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:53,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:53,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:13:53,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464543475] [2022-01-18 17:13:53,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:53,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:13:53,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:53,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:13:53,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:13:53,648 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:54,027 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 17:13:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:13:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-01-18 17:13:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:54,034 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 17:13:54,034 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 17:13:54,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:13:54,035 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 323 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:54,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 161 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 17:13:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 17:13:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 17:13:54,083 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 17:13:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:54,083 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 17:13:54,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:54,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 17:13:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:54,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:54,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:54,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 17:13:54,302 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-01-18 17:13:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:54,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983377615] [2022-01-18 17:13:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:54,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:54,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:54,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983377615] [2022-01-18 17:13:54,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983377615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:54,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11579878] [2022-01-18 17:13:54,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:13:54,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:54,339 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:54,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 17:13:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:54,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:54,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:54,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11579878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:54,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:54,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:13:54,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935773473] [2022-01-18 17:13:54,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:54,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:13:54,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:54,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:13:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:13:54,514 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:55,077 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 17:13:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:13:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-01-18 17:13:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:55,084 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 17:13:55,084 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 17:13:55,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:13:55,085 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 388 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:55,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 258 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:13:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 17:13:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 17:13:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 17:13:55,119 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 17:13:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:55,119 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 17:13:55,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 17:13:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:55,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:55,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:55,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:55,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 17:13:55,325 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-01-18 17:13:55,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:55,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275825246] [2022-01-18 17:13:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:55,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:55,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275825246] [2022-01-18 17:13:55,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275825246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452639258] [2022-01-18 17:13:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:13:55,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:55,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:55,368 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:55,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 17:13:55,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:13:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:55,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:55,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:55,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452639258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:55,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:55,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:13:55,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345447075] [2022-01-18 17:13:55,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:55,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:13:55,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:55,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:13:55,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:13:55,564 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:56,118 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 17:13:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:13:56,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 24 [2022-01-18 17:13:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:56,123 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 17:13:56,123 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 17:13:56,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:13:56,124 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 351 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:56,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 199 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 17:13:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 17:13:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 17:13:56,156 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 17:13:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:56,156 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 17:13:56,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 17:13:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:13:56,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:56,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:56,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 17:13:56,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 17:13:56,374 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-01-18 17:13:56,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:56,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949209569] [2022-01-18 17:13:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:56,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:56,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:56,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949209569] [2022-01-18 17:13:56,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949209569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570617829] [2022-01-18 17:13:56,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:13:56,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:56,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:56,405 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:56,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 17:13:56,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:13:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:13:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:56,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:56,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570617829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:56,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:56,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:13:56,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137552695] [2022-01-18 17:13:56,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:56,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:13:56,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:13:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:13:56,520 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 17:13:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:13:56,904 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 17:13:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:13:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 24 [2022-01-18 17:13:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:13:56,909 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 17:13:56,909 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 17:13:56,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:13:56,910 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 294 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:13:56,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 150 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:13:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 17:13:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 17:13:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:13:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 17:13:56,940 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 17:13:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:13:56,941 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 17:13:56,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 17:13:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 17:13:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:13:56,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:13:56,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:13:56,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 17:13:57,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 17:13:57,167 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:13:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:13:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-01-18 17:13:57,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:13:57,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120746272] [2022-01-18 17:13:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:13:57,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:13:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:13:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:57,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:13:57,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120746272] [2022-01-18 17:13:57,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120746272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:13:57,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962253937] [2022-01-18 17:13:57,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:13:57,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:13:57,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:13:57,455 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:13:57,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 17:13:57,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:13:57,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:13:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:13:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:13:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:13:57,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:13:57,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:13:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:58,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:13:58,669 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:13:58,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 161 [2022-01-18 17:13:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:13:59,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962253937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:13:59,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:13:59,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:13:59,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116580962] [2022-01-18 17:13:59,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:13:59,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:13:59,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:13:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:13:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:13:59,719 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:14:03,724 INFO L93 Difference]: Finished difference Result 3630 states and 11848 transitions. [2022-01-18 17:14:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:14:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:14:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:14:03,731 INFO L225 Difference]: With dead ends: 3630 [2022-01-18 17:14:03,731 INFO L226 Difference]: Without dead ends: 3585 [2022-01-18 17:14:03,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:14:03,732 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 386 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:14:03,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 292 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:14:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-01-18 17:14:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 1767. [2022-01-18 17:14:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 3.5781426953567386) internal successors, (6319), 1766 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6319 transitions. [2022-01-18 17:14:03,766 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6319 transitions. Word has length 26 [2022-01-18 17:14:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:14:03,766 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 6319 transitions. [2022-01-18 17:14:03,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6319 transitions. [2022-01-18 17:14:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:14:03,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:14:03,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:14:03,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 17:14:03,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 17:14:03,975 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:14:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:14:03,976 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-01-18 17:14:03,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:14:03,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900544458] [2022-01-18 17:14:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:14:03,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:14:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:14:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:04,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:14:04,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900544458] [2022-01-18 17:14:04,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900544458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:14:04,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049010556] [2022-01-18 17:14:04,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:14:04,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:14:04,401 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:14:04,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:14:04,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:14:04,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 17:14:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:14:04,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:14:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:04,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:04,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:14:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:05,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:14:05,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:05,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:14:05,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:14:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:07,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049010556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:14:07,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:14:07,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:14:07,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406100411] [2022-01-18 17:14:07,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:14:07,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:14:07,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:14:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:14:07,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:14:07,019 INFO L87 Difference]: Start difference. First operand 1767 states and 6319 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:14:10,367 INFO L93 Difference]: Finished difference Result 4089 states and 13161 transitions. [2022-01-18 17:14:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:14:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:14:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:14:10,375 INFO L225 Difference]: With dead ends: 4089 [2022-01-18 17:14:10,375 INFO L226 Difference]: Without dead ends: 4059 [2022-01-18 17:14:10,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=863, Invalid=3693, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:14:10,387 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 536 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:14:10,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 311 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1108 Invalid, 0 Unknown, 98 Unchecked, 0.7s Time] [2022-01-18 17:14:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2022-01-18 17:14:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 1888. [2022-01-18 17:14:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.577106518282989) internal successors, (6750), 1887 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6750 transitions. [2022-01-18 17:14:10,432 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6750 transitions. Word has length 26 [2022-01-18 17:14:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:14:10,432 INFO L470 AbstractCegarLoop]: Abstraction has 1888 states and 6750 transitions. [2022-01-18 17:14:10,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6750 transitions. [2022-01-18 17:14:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:14:10,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:14:10,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:14:10,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 17:14:10,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 17:14:10,651 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:14:10,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:14:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1106289214, now seen corresponding path program 6 times [2022-01-18 17:14:10,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:14:10,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586944128] [2022-01-18 17:14:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:14:10,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:14:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:14:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:11,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:14:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586944128] [2022-01-18 17:14:11,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586944128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:14:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748557399] [2022-01-18 17:14:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:14:11,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:14:11,012 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:14:11,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 17:14:11,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:14:11,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:14:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:14:11,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:14:11,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:11,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:14:11,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:14:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:12,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:14:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:12,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:14:12,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-01-18 17:14:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:13,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748557399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:14:13,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:14:13,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 17:14:13,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228283450] [2022-01-18 17:14:13,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:14:13,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:14:13,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:14:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:14:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:14:13,406 INFO L87 Difference]: Start difference. First operand 1888 states and 6750 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:14:22,932 INFO L93 Difference]: Finished difference Result 3978 states and 13034 transitions. [2022-01-18 17:14:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 17:14:22,932 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:14:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:14:22,939 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 17:14:22,940 INFO L226 Difference]: Without dead ends: 3933 [2022-01-18 17:14:22,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3515 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1432, Invalid=8870, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 17:14:22,942 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 521 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:14:22,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 685 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2058 Invalid, 0 Unknown, 872 Unchecked, 1.3s Time] [2022-01-18 17:14:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2022-01-18 17:14:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 1944. [2022-01-18 17:14:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 3.5795162120432322) internal successors, (6955), 1943 states have internal predecessors, (6955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 6955 transitions. [2022-01-18 17:14:22,997 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 6955 transitions. Word has length 26 [2022-01-18 17:14:22,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:14:22,998 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 6955 transitions. [2022-01-18 17:14:22,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 6955 transitions. [2022-01-18 17:14:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:14:23,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:14:23,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:14:23,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 17:14:23,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 17:14:23,217 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:14:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:14:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-01-18 17:14:23,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:14:23,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916163005] [2022-01-18 17:14:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:14:23,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:14:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:14:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:23,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:14:23,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916163005] [2022-01-18 17:14:23,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916163005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:14:23,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507731723] [2022-01-18 17:14:23,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:14:23,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:14:23,797 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:14:23,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 17:14:23,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:14:23,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:14:23,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:14:23,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:14:24,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:24,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:24,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:24,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:14:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:24,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:14:25,072 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:14:25,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:14:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:25,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507731723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:14:25,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:14:25,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 17:14:25,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963982495] [2022-01-18 17:14:25,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:14:25,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:14:25,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:14:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:14:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:14:25,525 INFO L87 Difference]: Start difference. First operand 1944 states and 6955 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:14:29,729 INFO L93 Difference]: Finished difference Result 3870 states and 12988 transitions. [2022-01-18 17:14:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:14:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:14:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:14:29,736 INFO L225 Difference]: With dead ends: 3870 [2022-01-18 17:14:29,737 INFO L226 Difference]: Without dead ends: 3840 [2022-01-18 17:14:29,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=848, Invalid=4702, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:14:29,737 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 339 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:14:29,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 352 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:14:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2022-01-18 17:14:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 1990. [2022-01-18 17:14:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.5696329813976875) internal successors, (7100), 1989 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 7100 transitions. [2022-01-18 17:14:29,779 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 7100 transitions. Word has length 26 [2022-01-18 17:14:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:14:29,779 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 7100 transitions. [2022-01-18 17:14:29,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 7100 transitions. [2022-01-18 17:14:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:14:29,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:14:29,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:14:29,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 17:14:29,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 17:14:29,988 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:14:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:14:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 7 times [2022-01-18 17:14:29,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:14:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909779146] [2022-01-18 17:14:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:14:29,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:14:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:14:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:30,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:14:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909779146] [2022-01-18 17:14:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909779146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:14:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874175234] [2022-01-18 17:14:30,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:14:30,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:30,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:14:30,275 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:14:30,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 17:14:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:14:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:14:30,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:14:31,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:31,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:31,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:14:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:31,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:14:31,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:31,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:14:31,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-01-18 17:14:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:34,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874175234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:14:34,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:14:34,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:14:34,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470594164] [2022-01-18 17:14:34,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:14:34,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:14:34,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:14:34,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:14:34,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:14:34,389 INFO L87 Difference]: Start difference. First operand 1990 states and 7100 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:14:39,550 INFO L93 Difference]: Finished difference Result 4768 states and 14952 transitions. [2022-01-18 17:14:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 17:14:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:14:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:14:39,561 INFO L225 Difference]: With dead ends: 4768 [2022-01-18 17:14:39,562 INFO L226 Difference]: Without dead ends: 4738 [2022-01-18 17:14:39,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1123, Invalid=4577, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:14:39,563 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 668 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:14:39,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 452 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1582 Invalid, 0 Unknown, 225 Unchecked, 1.1s Time] [2022-01-18 17:14:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-01-18 17:14:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 2032. [2022-01-18 17:14:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.564746430329887) internal successors, (7240), 2031 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7240 transitions. [2022-01-18 17:14:39,680 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7240 transitions. Word has length 26 [2022-01-18 17:14:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:14:39,680 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 7240 transitions. [2022-01-18 17:14:39,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7240 transitions. [2022-01-18 17:14:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:14:39,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:14:39,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:14:39,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 17:14:39,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:39,903 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:14:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:14:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-01-18 17:14:39,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:14:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151460215] [2022-01-18 17:14:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:14:39,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:14:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:14:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:40,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:14:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151460215] [2022-01-18 17:14:40,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151460215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:14:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514457128] [2022-01-18 17:14:40,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:14:40,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:40,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:14:40,385 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:14:40,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 17:14:40,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:14:40,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:14:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:14:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:14:40,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:40,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:40,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:14:40,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:14:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:40,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:14:41,344 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:14:41,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:14:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:41,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514457128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:14:41,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:14:41,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 17:14:41,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541722308] [2022-01-18 17:14:41,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:14:41,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:14:41,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:14:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:14:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:14:41,787 INFO L87 Difference]: Start difference. First operand 2032 states and 7240 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:14:47,848 INFO L93 Difference]: Finished difference Result 4884 states and 15991 transitions. [2022-01-18 17:14:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 17:14:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:14:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:14:47,867 INFO L225 Difference]: With dead ends: 4884 [2022-01-18 17:14:47,867 INFO L226 Difference]: Without dead ends: 4822 [2022-01-18 17:14:47,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1548, Invalid=8154, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 17:14:47,868 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 470 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:14:47,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 566 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 17:14:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2022-01-18 17:14:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2058. [2022-01-18 17:14:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 3.5639280505590665) internal successors, (7331), 2057 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 7331 transitions. [2022-01-18 17:14:47,930 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 7331 transitions. Word has length 26 [2022-01-18 17:14:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:14:47,930 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 7331 transitions. [2022-01-18 17:14:47,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:14:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 7331 transitions. [2022-01-18 17:14:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:14:47,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:14:47,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:14:47,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 17:14:48,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:48,147 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:14:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:14:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-01-18 17:14:48,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:14:48,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753709885] [2022-01-18 17:14:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:14:48,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:14:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:14:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:48,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:14:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753709885] [2022-01-18 17:14:48,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753709885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:14:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717633749] [2022-01-18 17:14:48,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:14:48,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:14:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:14:48,494 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:14:48,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 17:14:48,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:14:48,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:14:48,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:14:48,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:14:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:14:48,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:14:48,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-01-18 17:14:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:49,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:14:49,672 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:14:49,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:14:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:14:50,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717633749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:14:50,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:14:50,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-01-18 17:14:50,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389503887] [2022-01-18 17:14:50,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:14:50,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:14:50,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:14:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:14:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:14:50,207 INFO L87 Difference]: Start difference. First operand 2058 states and 7331 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:15:09,058 INFO L93 Difference]: Finished difference Result 5933 states and 18878 transitions. [2022-01-18 17:15:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-18 17:15:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:15:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:15:09,068 INFO L225 Difference]: With dead ends: 5933 [2022-01-18 17:15:09,069 INFO L226 Difference]: Without dead ends: 5885 [2022-01-18 17:15:09,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18563 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=4659, Invalid=39651, Unknown=0, NotChecked=0, Total=44310 [2022-01-18 17:15:09,070 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 688 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 4961 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:15:09,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1041 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4961 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 17:15:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2022-01-18 17:15:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 2149. [2022-01-18 17:15:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2148 states have (on average 3.5591247672253257) internal successors, (7645), 2148 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 7645 transitions. [2022-01-18 17:15:09,126 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 7645 transitions. Word has length 26 [2022-01-18 17:15:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:15:09,126 INFO L470 AbstractCegarLoop]: Abstraction has 2149 states and 7645 transitions. [2022-01-18 17:15:09,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 7645 transitions. [2022-01-18 17:15:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:15:09,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:15:09,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:15:09,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 17:15:09,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 17:15:09,331 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:15:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:15:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 8 times [2022-01-18 17:15:09,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:15:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399722050] [2022-01-18 17:15:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:15:09,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:15:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:15:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:09,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:15:09,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399722050] [2022-01-18 17:15:09,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399722050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:15:09,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134990662] [2022-01-18 17:15:09,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:15:09,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:15:09,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:15:09,811 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:15:09,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 17:15:09,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:15:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:15:09,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:15:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:15:10,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:15:10,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:15:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:10,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:15:11,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:15:11,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:15:11,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:15:11,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-01-18 17:15:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:11,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134990662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:15:11,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:15:11,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 17:15:11,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424712326] [2022-01-18 17:15:11,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:15:11,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:15:11,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:15:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:15:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:15:11,663 INFO L87 Difference]: Start difference. First operand 2149 states and 7645 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:15:17,485 INFO L93 Difference]: Finished difference Result 4622 states and 15242 transitions. [2022-01-18 17:15:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:15:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:15:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:15:17,493 INFO L225 Difference]: With dead ends: 4622 [2022-01-18 17:15:17,493 INFO L226 Difference]: Without dead ends: 4586 [2022-01-18 17:15:17,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1018, Invalid=4682, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:15:17,496 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 574 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:15:17,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 375 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1546 Invalid, 0 Unknown, 140 Unchecked, 0.9s Time] [2022-01-18 17:15:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2022-01-18 17:15:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 2173. [2022-01-18 17:15:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.559852670349908) internal successors, (7732), 2172 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7732 transitions. [2022-01-18 17:15:17,539 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7732 transitions. Word has length 26 [2022-01-18 17:15:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:15:17,539 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 7732 transitions. [2022-01-18 17:15:17,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7732 transitions. [2022-01-18 17:15:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:15:17,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:15:17,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:15:17,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 17:15:17,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 17:15:17,764 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:15:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:15:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1377789112, now seen corresponding path program 9 times [2022-01-18 17:15:17,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:15:17,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336804492] [2022-01-18 17:15:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:15:17,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:15:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:15:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:18,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:15:18,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336804492] [2022-01-18 17:15:18,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336804492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:15:18,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491046443] [2022-01-18 17:15:18,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:15:18,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:15:18,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:15:18,160 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:15:18,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 17:15:18,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:15:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:15:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:15:18,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:15:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:15:18,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:15:18,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:15:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:18,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:15:19,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:15:19,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:15:19,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-01-18 17:15:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:21,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491046443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:15:21,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:15:21,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:15:21,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67064077] [2022-01-18 17:15:21,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:15:21,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:15:21,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:15:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:15:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:15:21,135 INFO L87 Difference]: Start difference. First operand 2173 states and 7732 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:15:24,791 INFO L93 Difference]: Finished difference Result 4709 states and 15097 transitions. [2022-01-18 17:15:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:15:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:15:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:15:24,799 INFO L225 Difference]: With dead ends: 4709 [2022-01-18 17:15:24,800 INFO L226 Difference]: Without dead ends: 4687 [2022-01-18 17:15:24,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=954, Invalid=4016, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:15:24,801 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 620 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:15:24,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 324 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1269 Invalid, 0 Unknown, 100 Unchecked, 0.7s Time] [2022-01-18 17:15:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2022-01-18 17:15:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 2205. [2022-01-18 17:15:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 3.558076225045372) internal successors, (7842), 2204 states have internal predecessors, (7842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 7842 transitions. [2022-01-18 17:15:24,853 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 7842 transitions. Word has length 26 [2022-01-18 17:15:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:15:24,853 INFO L470 AbstractCegarLoop]: Abstraction has 2205 states and 7842 transitions. [2022-01-18 17:15:24,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 7842 transitions. [2022-01-18 17:15:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:15:24,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:15:24,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:15:24,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 17:15:25,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 17:15:25,084 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:15:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:15:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 10 times [2022-01-18 17:15:25,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:15:25,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805187031] [2022-01-18 17:15:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:15:25,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:15:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:15:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:25,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:15:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805187031] [2022-01-18 17:15:25,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805187031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:15:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818429420] [2022-01-18 17:15:25,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:15:25,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:15:25,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:15:25,286 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:15:25,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 17:15:25,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:15:25,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:15:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:15:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:15:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:15:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:15:25,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:15:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:15:26,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:15:26,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:15:26,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 193 treesize of output 163 [2022-01-18 17:15:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:27,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818429420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:15:27,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:15:27,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:15:27,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910128677] [2022-01-18 17:15:27,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:15:27,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:15:27,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:15:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:15:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:15:27,853 INFO L87 Difference]: Start difference. First operand 2205 states and 7842 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 17:15:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:15:32,207 INFO L93 Difference]: Finished difference Result 5001 states and 16066 transitions. [2022-01-18 17:15:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:15:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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 26 [2022-01-18 17:15:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:15:32,215 INFO L225 Difference]: With dead ends: 5001 [2022-01-18 17:15:32,215 INFO L226 Difference]: Without dead ends: 4956 [2022-01-18 17:15:32,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=864, Invalid=3296, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:15:32,227 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 524 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:15:32,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 356 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:15:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2022-01-18 17:15:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 2233. [2022-01-18 17:15:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.568100358422939) internal successors, (7964), 2232 states have internal predecessors, (7964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 7964 transitions. [2022-01-18 17:15:32,296 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 7964 transitions. Word has length 26 [2022-01-18 17:15:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:15:32,296 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 7964 transitions. [2022-01-18 17:15:32,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 17:15:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 7964 transitions. [2022-01-18 17:15:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:15:32,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:15:32,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:15:32,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 17:15:32,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:15:32,502 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:15:32,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:15:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 11 times [2022-01-18 17:15:32,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:15:32,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854025323] [2022-01-18 17:15:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:15:32,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:15:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:15:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:32,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:15:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854025323] [2022-01-18 17:15:32,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854025323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:15:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612583647] [2022-01-18 17:15:32,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:15:32,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:15:32,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:15:32,779 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:15:32,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 17:15:32,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:15:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:15:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:15:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:15:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:15:33,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:15:33,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:15:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:33,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:15:33,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:15:33,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:15:33,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:15:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:35,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612583647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:15:35,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:15:35,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:15:35,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117525654] [2022-01-18 17:15:35,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:15:35,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:15:35,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:15:35,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:15:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:15:35,025 INFO L87 Difference]: Start difference. First operand 2233 states and 7964 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:15:50,485 INFO L93 Difference]: Finished difference Result 6778 states and 21601 transitions. [2022-01-18 17:15:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 17:15:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:15:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:15:50,497 INFO L225 Difference]: With dead ends: 6778 [2022-01-18 17:15:50,497 INFO L226 Difference]: Without dead ends: 6689 [2022-01-18 17:15:50,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=2748, Invalid=14022, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 17:15:50,498 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 894 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 2658 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:15:50,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 654 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2658 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 17:15:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6689 states. [2022-01-18 17:15:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6689 to 2299. [2022-01-18 17:15:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.594429939077459) internal successors, (8260), 2298 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 8260 transitions. [2022-01-18 17:15:50,580 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 8260 transitions. Word has length 26 [2022-01-18 17:15:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:15:50,580 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 8260 transitions. [2022-01-18 17:15:50,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 8260 transitions. [2022-01-18 17:15:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:15:50,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:15:50,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:15:50,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 17:15:50,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 17:15:50,784 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:15:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:15:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 12 times [2022-01-18 17:15:50,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:15:50,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991363886] [2022-01-18 17:15:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:15:50,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:15:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:15:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:51,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:15:51,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991363886] [2022-01-18 17:15:51,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991363886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:15:51,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833878425] [2022-01-18 17:15:51,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:15:51,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:15:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:15:51,169 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:15:51,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:15:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:15:51,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 17:15:51,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:15:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:15:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:15:51,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:15:51,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:15:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:52,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:15:52,404 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:15:52,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:15:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:15:53,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833878425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:15:53,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:15:53,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:15:53,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430950663] [2022-01-18 17:15:53,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:15:53,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:15:53,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:15:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:15:53,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:15:53,703 INFO L87 Difference]: Start difference. First operand 2299 states and 8260 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:15:59,801 INFO L93 Difference]: Finished difference Result 4933 states and 16145 transitions. [2022-01-18 17:15:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 17:15:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:15:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:15:59,810 INFO L225 Difference]: With dead ends: 4933 [2022-01-18 17:15:59,810 INFO L226 Difference]: Without dead ends: 4888 [2022-01-18 17:15:59,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1369, Invalid=8137, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 17:15:59,811 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 425 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:15:59,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 539 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 17:15:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2022-01-18 17:15:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 2312. [2022-01-18 17:15:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 3.5980095196884467) internal successors, (8315), 2311 states have internal predecessors, (8315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 8315 transitions. [2022-01-18 17:15:59,859 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 8315 transitions. Word has length 26 [2022-01-18 17:15:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:15:59,859 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 8315 transitions. [2022-01-18 17:15:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:15:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 8315 transitions. [2022-01-18 17:15:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:15:59,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:15:59,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:15:59,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 17:16:00,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:00,077 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:16:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:16:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash -235126068, now seen corresponding path program 13 times [2022-01-18 17:16:00,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:16:00,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145847636] [2022-01-18 17:16:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:16:00,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:16:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:00,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:16:00,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145847636] [2022-01-18 17:16:00,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145847636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:16:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565404585] [2022-01-18 17:16:00,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:16:00,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:16:00,356 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:16:00,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 17:16:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:00,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:16:00,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:16:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:16:00,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:16:00,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:16:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:00,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:16:01,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:16:01,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:01,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-01-18 17:16:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:02,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565404585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:16:02,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:16:02,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:16:02,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597418272] [2022-01-18 17:16:02,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:16:02,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:16:02,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:16:02,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:16:02,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:16:02,661 INFO L87 Difference]: Start difference. First operand 2312 states and 8315 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:16:07,932 INFO L93 Difference]: Finished difference Result 6125 states and 19207 transitions. [2022-01-18 17:16:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:16:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:16:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:16:07,942 INFO L225 Difference]: With dead ends: 6125 [2022-01-18 17:16:07,942 INFO L226 Difference]: Without dead ends: 6081 [2022-01-18 17:16:07,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1421, Invalid=4899, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 17:16:07,942 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 769 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:16:07,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 479 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1479 Invalid, 0 Unknown, 110 Unchecked, 0.9s Time] [2022-01-18 17:16:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6081 states. [2022-01-18 17:16:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6081 to 2365. [2022-01-18 17:16:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.6099830795262267) internal successors, (8534), 2364 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 8534 transitions. [2022-01-18 17:16:07,994 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 8534 transitions. Word has length 26 [2022-01-18 17:16:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:16:07,995 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 8534 transitions. [2022-01-18 17:16:07,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 8534 transitions. [2022-01-18 17:16:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:16:07,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:16:07,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:16:08,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 17:16:08,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 17:16:08,211 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:16:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:16:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1729033790, now seen corresponding path program 14 times [2022-01-18 17:16:08,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:16:08,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375356502] [2022-01-18 17:16:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:16:08,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:16:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:08,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:16:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375356502] [2022-01-18 17:16:08,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375356502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:16:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235457521] [2022-01-18 17:16:08,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:16:08,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:08,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:16:08,507 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:16:08,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 17:16:08,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:16:08,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:16:08,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:16:08,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:16:09,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:16:09,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:09,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:16:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:09,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:16:09,815 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:16:09,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:16:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:11,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235457521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:16:11,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:16:11,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:16:11,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391657875] [2022-01-18 17:16:11,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:16:11,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:16:11,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:16:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:16:11,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:16:11,528 INFO L87 Difference]: Start difference. First operand 2365 states and 8534 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:16:20,511 INFO L93 Difference]: Finished difference Result 5571 states and 17968 transitions. [2022-01-18 17:16:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 17:16:20,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:16:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:16:20,519 INFO L225 Difference]: With dead ends: 5571 [2022-01-18 17:16:20,519 INFO L226 Difference]: Without dead ends: 5526 [2022-01-18 17:16:20,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3979 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1669, Invalid=9673, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 17:16:20,520 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 601 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:16:20,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 700 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2860 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 17:16:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2022-01-18 17:16:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 2349. [2022-01-18 17:16:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.610732538330494) internal successors, (8478), 2348 states have internal predecessors, (8478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 8478 transitions. [2022-01-18 17:16:20,571 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 8478 transitions. Word has length 26 [2022-01-18 17:16:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:16:20,571 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 8478 transitions. [2022-01-18 17:16:20,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 8478 transitions. [2022-01-18 17:16:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:16:20,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:16:20,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:16:20,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 17:16:20,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 17:16:20,790 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:16:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:16:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash 555566964, now seen corresponding path program 15 times [2022-01-18 17:16:20,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:16:20,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837322261] [2022-01-18 17:16:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:16:20,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:16:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:21,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:16:21,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837322261] [2022-01-18 17:16:21,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837322261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:16:21,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71934244] [2022-01-18 17:16:21,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:16:21,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:21,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:16:21,009 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:16:21,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 17:16:21,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:16:21,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:16:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:16:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:16:21,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:21,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:16:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:21,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:16:22,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:16:22,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:16:22,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:22,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-01-18 17:16:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:23,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71934244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:16:23,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:16:23,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 17:16:23,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687159034] [2022-01-18 17:16:23,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:16:23,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:16:23,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:16:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:16:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:16:23,175 INFO L87 Difference]: Start difference. First operand 2349 states and 8478 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:16:27,055 INFO L93 Difference]: Finished difference Result 4351 states and 14603 transitions. [2022-01-18 17:16:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:16:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:16:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:16:27,063 INFO L225 Difference]: With dead ends: 4351 [2022-01-18 17:16:27,063 INFO L226 Difference]: Without dead ends: 4315 [2022-01-18 17:16:27,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=751, Invalid=3941, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:16:27,063 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 600 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:16:27,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 314 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:16:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2022-01-18 17:16:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2350. [2022-01-18 17:16:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 3.609621115368242) internal successors, (8479), 2349 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 8479 transitions. [2022-01-18 17:16:27,106 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 8479 transitions. Word has length 26 [2022-01-18 17:16:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:16:27,106 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 8479 transitions. [2022-01-18 17:16:27,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 8479 transitions. [2022-01-18 17:16:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:16:27,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:16:27,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:16:27,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 17:16:27,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:27,310 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:16:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:16:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1636584436, now seen corresponding path program 16 times [2022-01-18 17:16:27,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:16:27,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723994548] [2022-01-18 17:16:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:16:27,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:16:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:27,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:16:27,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723994548] [2022-01-18 17:16:27,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723994548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:16:27,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544324382] [2022-01-18 17:16:27,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:16:27,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:27,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:16:27,606 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:16:27,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 17:16:27,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:16:27,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:16:27,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:16:27,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:16:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:16:27,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:27,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:16:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:28,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:16:28,890 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:16:28,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:16:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:30,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544324382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:16:30,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:16:30,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:16:30,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127921682] [2022-01-18 17:16:30,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:16:30,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:16:30,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:16:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:16:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:16:30,215 INFO L87 Difference]: Start difference. First operand 2350 states and 8479 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:16:35,526 INFO L93 Difference]: Finished difference Result 4695 states and 15501 transitions. [2022-01-18 17:16:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:16:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:16:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:16:35,534 INFO L225 Difference]: With dead ends: 4695 [2022-01-18 17:16:35,534 INFO L226 Difference]: Without dead ends: 4658 [2022-01-18 17:16:35,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=955, Invalid=6185, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:16:35,535 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 335 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:16:35,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 440 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:16:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2022-01-18 17:16:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 2367. [2022-01-18 17:16:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 3.60989010989011) internal successors, (8541), 2366 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 8541 transitions. [2022-01-18 17:16:35,582 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 8541 transitions. Word has length 26 [2022-01-18 17:16:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:16:35,582 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 8541 transitions. [2022-01-18 17:16:35,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 8541 transitions. [2022-01-18 17:16:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:16:35,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:16:35,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:16:35,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 17:16:35,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 17:16:35,802 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:16:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:16:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash 884726536, now seen corresponding path program 17 times [2022-01-18 17:16:35,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:16:35,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965489987] [2022-01-18 17:16:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:16:35,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:16:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:36,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:16:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965489987] [2022-01-18 17:16:36,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965489987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:16:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876293479] [2022-01-18 17:16:36,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:16:36,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:16:36,047 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:16:36,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 17:16:36,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:16:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:16:36,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:16:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:16:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:16:36,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:36,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:16:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:36,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:16:37,004 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:16:37,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:16:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:37,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876293479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:16:37,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:16:37,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:16:37,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643510777] [2022-01-18 17:16:37,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:16:37,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:16:37,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:16:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:16:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:16:37,944 INFO L87 Difference]: Start difference. First operand 2367 states and 8541 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:16:44,443 INFO L93 Difference]: Finished difference Result 4916 states and 16318 transitions. [2022-01-18 17:16:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 17:16:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:16:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:16:44,451 INFO L225 Difference]: With dead ends: 4916 [2022-01-18 17:16:44,452 INFO L226 Difference]: Without dead ends: 4871 [2022-01-18 17:16:44,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1088, Invalid=6922, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:16:44,452 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 383 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:16:44,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 511 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 17:16:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2022-01-18 17:16:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 2367. [2022-01-18 17:16:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 3.60989010989011) internal successors, (8541), 2366 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 8541 transitions. [2022-01-18 17:16:44,502 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 8541 transitions. Word has length 26 [2022-01-18 17:16:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:16:44,502 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 8541 transitions. [2022-01-18 17:16:44,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 8541 transitions. [2022-01-18 17:16:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:16:44,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:16:44,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:16:44,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 17:16:44,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 17:16:44,721 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:16:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:16:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 18 times [2022-01-18 17:16:44,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:16:44,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492991581] [2022-01-18 17:16:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:16:44,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:16:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:45,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:16:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492991581] [2022-01-18 17:16:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492991581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:16:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846626716] [2022-01-18 17:16:45,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:16:45,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:45,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:16:45,201 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:16:45,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 17:16:45,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:16:45,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:16:45,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:16:45,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:16:45,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:16:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:16:45,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:16:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:45,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:16:46,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:16:46,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:46,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-01-18 17:16:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846626716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:16:47,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:16:47,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:16:47,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914012078] [2022-01-18 17:16:47,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:16:47,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:16:47,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:16:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:16:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:16:47,728 INFO L87 Difference]: Start difference. First operand 2367 states and 8541 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 17:16:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:16:51,638 INFO L93 Difference]: Finished difference Result 4624 states and 15091 transitions. [2022-01-18 17:16:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:16:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 26 [2022-01-18 17:16:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:16:51,646 INFO L225 Difference]: With dead ends: 4624 [2022-01-18 17:16:51,646 INFO L226 Difference]: Without dead ends: 4496 [2022-01-18 17:16:51,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=685, Invalid=3097, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:16:51,647 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 398 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:16:51,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 373 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:16:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2022-01-18 17:16:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 2506. [2022-01-18 17:16:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 3.596806387225549) internal successors, (9010), 2505 states have internal predecessors, (9010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:16:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 9010 transitions. [2022-01-18 17:16:51,689 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 9010 transitions. Word has length 26 [2022-01-18 17:16:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:16:51,690 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 9010 transitions. [2022-01-18 17:16:51,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 17:16:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 9010 transitions. [2022-01-18 17:16:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:16:51,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:16:51,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:16:51,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 17:16:51,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:51,908 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:16:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:16:51,909 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 19 times [2022-01-18 17:16:51,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:16:51,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471948562] [2022-01-18 17:16:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:16:51,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:16:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:52,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:16:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471948562] [2022-01-18 17:16:52,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471948562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:16:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160171414] [2022-01-18 17:16:52,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:16:52,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:16:52,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:16:52,114 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:16:52,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 17:16:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:16:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:16:52,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:16:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:16:52,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:16:52,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:16:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:52,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:16:53,341 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:16:53,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 157 [2022-01-18 17:16:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:16:55,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160171414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:16:55,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:16:55,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:16:55,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209764617] [2022-01-18 17:16:55,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:16:55,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:16:55,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:16:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:16:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:16:55,416 INFO L87 Difference]: Start difference. First operand 2506 states and 9010 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:17:04,950 INFO L93 Difference]: Finished difference Result 5800 states and 18884 transitions. [2022-01-18 17:17:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 17:17:04,951 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:17:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:17:04,960 INFO L225 Difference]: With dead ends: 5800 [2022-01-18 17:17:04,960 INFO L226 Difference]: Without dead ends: 5700 [2022-01-18 17:17:04,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4166 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1785, Invalid=10205, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 17:17:04,961 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 515 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:17:04,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 439 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:17:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2022-01-18 17:17:05,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 2558. [2022-01-18 17:17:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2557 states have (on average 3.5936644505279625) internal successors, (9189), 2557 states have internal predecessors, (9189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 9189 transitions. [2022-01-18 17:17:05,012 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 9189 transitions. Word has length 26 [2022-01-18 17:17:05,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:17:05,012 INFO L470 AbstractCegarLoop]: Abstraction has 2558 states and 9189 transitions. [2022-01-18 17:17:05,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 9189 transitions. [2022-01-18 17:17:05,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:17:05,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:17:05,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:17:05,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 17:17:05,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:17:05,231 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:17:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:17:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 20 times [2022-01-18 17:17:05,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:17:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890486553] [2022-01-18 17:17:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:17:05,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:17:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:17:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:05,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:17:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890486553] [2022-01-18 17:17:05,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890486553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:17:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726277960] [2022-01-18 17:17:05,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:17:05,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:17:05,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:17:05,557 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:17:05,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 17:17:05,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:17:05,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:17:05,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:17:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:17:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:17:05,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:17:05,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:17:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:06,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:17:06,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:17:06,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-01-18 17:17:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:09,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726277960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:17:09,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:17:09,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-18 17:17:10,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015725490] [2022-01-18 17:17:10,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:17:10,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:17:10,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:17:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:17:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:17:10,000 INFO L87 Difference]: Start difference. First operand 2558 states and 9189 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:17:15,526 INFO L93 Difference]: Finished difference Result 5226 states and 17045 transitions. [2022-01-18 17:17:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 17:17:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:17:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:17:15,535 INFO L225 Difference]: With dead ends: 5226 [2022-01-18 17:17:15,535 INFO L226 Difference]: Without dead ends: 5114 [2022-01-18 17:17:15,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1207, Invalid=5765, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 17:17:15,536 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 491 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:17:15,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 326 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1269 Invalid, 0 Unknown, 249 Unchecked, 0.7s Time] [2022-01-18 17:17:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2022-01-18 17:17:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 2608. [2022-01-18 17:17:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2607 states have (on average 3.6006904487917146) internal successors, (9387), 2607 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 9387 transitions. [2022-01-18 17:17:15,585 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 9387 transitions. Word has length 26 [2022-01-18 17:17:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:17:15,585 INFO L470 AbstractCegarLoop]: Abstraction has 2608 states and 9387 transitions. [2022-01-18 17:17:15,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 9387 transitions. [2022-01-18 17:17:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:17:15,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:17:15,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:17:15,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 17:17:15,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:17:15,791 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:17:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:17:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 21 times [2022-01-18 17:17:15,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:17:15,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205966644] [2022-01-18 17:17:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:17:15,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:17:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:17:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:16,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:17:16,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205966644] [2022-01-18 17:17:16,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205966644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:17:16,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323043569] [2022-01-18 17:17:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:17:16,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:17:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:17:16,047 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:17:16,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 17:17:16,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:17:16,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:17:16,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:17:16,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:17:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:17:16,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:17:16,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:17:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:16,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:17:17,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:17:17,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:17:17,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 203 treesize of output 169 [2022-01-18 17:17:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:18,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323043569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:17:18,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:17:18,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:17:18,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450559029] [2022-01-18 17:17:18,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:17:18,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:17:18,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:17:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:17:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:17:18,878 INFO L87 Difference]: Start difference. First operand 2608 states and 9387 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:17:21,486 INFO L93 Difference]: Finished difference Result 4659 states and 15432 transitions. [2022-01-18 17:17:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:17:21,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:17:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:17:21,494 INFO L225 Difference]: With dead ends: 4659 [2022-01-18 17:17:21,494 INFO L226 Difference]: Without dead ends: 4617 [2022-01-18 17:17:21,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:17:21,495 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 372 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:17:21,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 365 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 859 Invalid, 0 Unknown, 481 Unchecked, 0.5s Time] [2022-01-18 17:17:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2022-01-18 17:17:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2661. [2022-01-18 17:17:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 3.5981203007518796) internal successors, (9571), 2660 states have internal predecessors, (9571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 9571 transitions. [2022-01-18 17:17:21,540 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 9571 transitions. Word has length 26 [2022-01-18 17:17:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:17:21,541 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 9571 transitions. [2022-01-18 17:17:21,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 9571 transitions. [2022-01-18 17:17:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:17:21,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:17:21,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:17:21,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 17:17:21,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 17:17:21,748 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:17:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:17:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash -697050812, now seen corresponding path program 22 times [2022-01-18 17:17:21,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:17:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437837046] [2022-01-18 17:17:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:17:21,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:17:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:17:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:21,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:17:21,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437837046] [2022-01-18 17:17:21,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437837046] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:17:21,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814503687] [2022-01-18 17:17:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:17:21,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:17:21,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:17:21,948 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:17:21,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 17:17:21,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:17:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:17:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:17:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:17:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:17:22,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:17:22,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:17:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:22,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:17:23,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:17:23,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-01-18 17:17:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:38,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814503687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:17:38,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:17:38,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:17:38,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451002786] [2022-01-18 17:17:38,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:17:38,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:17:38,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:17:38,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:17:38,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:17:38,868 INFO L87 Difference]: Start difference. First operand 2661 states and 9571 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:17:43,476 INFO L93 Difference]: Finished difference Result 5349 states and 17670 transitions. [2022-01-18 17:17:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:17:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:17:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:17:43,487 INFO L225 Difference]: With dead ends: 5349 [2022-01-18 17:17:43,487 INFO L226 Difference]: Without dead ends: 5305 [2022-01-18 17:17:43,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1040, Invalid=4072, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:17:43,488 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 485 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:17:43,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 282 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 996 Invalid, 0 Unknown, 272 Unchecked, 0.6s Time] [2022-01-18 17:17:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5305 states. [2022-01-18 17:17:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5305 to 2662. [2022-01-18 17:17:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 3.603532506576475) internal successors, (9589), 2661 states have internal predecessors, (9589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 9589 transitions. [2022-01-18 17:17:43,559 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 9589 transitions. Word has length 26 [2022-01-18 17:17:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:17:43,559 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 9589 transitions. [2022-01-18 17:17:43,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 9589 transitions. [2022-01-18 17:17:43,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:17:43,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:17:43,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:17:43,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 17:17:43,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-18 17:17:43,785 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:17:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:17:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 23 times [2022-01-18 17:17:43,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:17:43,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809750402] [2022-01-18 17:17:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:17:43,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:17:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:17:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:44,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:17:44,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809750402] [2022-01-18 17:17:44,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809750402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:17:44,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350850090] [2022-01-18 17:17:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:17:44,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:17:44,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:17:44,145 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:17:44,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 17:17:44,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:17:44,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:17:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:17:44,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:17:44,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:17:44,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:17:44,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:17:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:45,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:17:45,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:17:45,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 173 [2022-01-18 17:17:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:17:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350850090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:17:48,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:17:48,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:17:48,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394126758] [2022-01-18 17:17:48,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:17:48,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:17:48,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:17:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:17:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:17:48,125 INFO L87 Difference]: Start difference. First operand 2662 states and 9589 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:17:59,716 INFO L93 Difference]: Finished difference Result 5266 states and 17539 transitions. [2022-01-18 17:17:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:17:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:17:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:17:59,724 INFO L225 Difference]: With dead ends: 5266 [2022-01-18 17:17:59,724 INFO L226 Difference]: Without dead ends: 5184 [2022-01-18 17:17:59,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1742, Invalid=9178, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 17:17:59,726 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 498 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:17:59,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 323 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1218 Invalid, 0 Unknown, 70 Unchecked, 0.8s Time] [2022-01-18 17:17:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2022-01-18 17:17:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 2764. [2022-01-18 17:17:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 3.6112920738327903) internal successors, (9978), 2763 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 9978 transitions. [2022-01-18 17:17:59,798 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 9978 transitions. Word has length 26 [2022-01-18 17:17:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:17:59,798 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 9978 transitions. [2022-01-18 17:17:59,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:17:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 9978 transitions. [2022-01-18 17:17:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:17:59,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:17:59,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:17:59,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 17:18:00,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 17:18:00,017 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash -879958864, now seen corresponding path program 24 times [2022-01-18 17:18:00,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:00,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107820944] [2022-01-18 17:18:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:00,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:00,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107820944] [2022-01-18 17:18:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107820944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710810679] [2022-01-18 17:18:00,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:18:00,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:00,256 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:00,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:18:00,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:18:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 17:18:00,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:18:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:00,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:00,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:18:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:00,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:01,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:01,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:01,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 157 [2022-01-18 17:18:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:03,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710810679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:03,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:03,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-18 17:18:03,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655599509] [2022-01-18 17:18:03,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:03,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:18:03,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:18:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:18:03,225 INFO L87 Difference]: Start difference. First operand 2764 states and 9978 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:18:07,230 INFO L93 Difference]: Finished difference Result 5463 states and 18164 transitions. [2022-01-18 17:18:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:18:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:18:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:18:07,241 INFO L225 Difference]: With dead ends: 5463 [2022-01-18 17:18:07,241 INFO L226 Difference]: Without dead ends: 5383 [2022-01-18 17:18:07,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=920, Invalid=4482, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:18:07,241 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 392 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:18:07,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 524 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1321 Invalid, 0 Unknown, 504 Unchecked, 0.7s Time] [2022-01-18 17:18:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2022-01-18 17:18:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 2773. [2022-01-18 17:18:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 3.6154401154401152) internal successors, (10022), 2772 states have internal predecessors, (10022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 10022 transitions. [2022-01-18 17:18:07,302 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 10022 transitions. Word has length 26 [2022-01-18 17:18:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:18:07,302 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 10022 transitions. [2022-01-18 17:18:07,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 10022 transitions. [2022-01-18 17:18:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:18:07,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:18:07,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:18:07,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 17:18:07,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:07,523 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1822017344, now seen corresponding path program 25 times [2022-01-18 17:18:07,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:07,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014640020] [2022-01-18 17:18:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:07,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:07,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:07,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014640020] [2022-01-18 17:18:07,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014640020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:07,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071511905] [2022-01-18 17:18:07,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:18:07,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:07,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:07,738 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:07,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 17:18:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:18:07,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:08,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:08,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 99 [2022-01-18 17:18:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:08,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:08,722 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:18:08,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 157 [2022-01-18 17:18:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:09,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071511905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:09,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:09,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:18:09,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583652439] [2022-01-18 17:18:09,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:09,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:18:09,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:18:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:18:09,799 INFO L87 Difference]: Start difference. First operand 2773 states and 10022 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:18:13,741 INFO L93 Difference]: Finished difference Result 5391 states and 17957 transitions. [2022-01-18 17:18:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:18:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:18:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:18:13,750 INFO L225 Difference]: With dead ends: 5391 [2022-01-18 17:18:13,750 INFO L226 Difference]: Without dead ends: 5320 [2022-01-18 17:18:13,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=890, Invalid=5116, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:18:13,751 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 400 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:18:13,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 353 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:18:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2022-01-18 17:18:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 2765. [2022-01-18 17:18:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 3.6150506512301015) internal successors, (9992), 2764 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 9992 transitions. [2022-01-18 17:18:13,805 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 9992 transitions. Word has length 26 [2022-01-18 17:18:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:18:13,805 INFO L470 AbstractCegarLoop]: Abstraction has 2765 states and 9992 transitions. [2022-01-18 17:18:13,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 9992 transitions. [2022-01-18 17:18:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:18:13,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:18:13,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:18:13,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 17:18:14,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:14,025 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1440358446, now seen corresponding path program 26 times [2022-01-18 17:18:14,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:14,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970017460] [2022-01-18 17:18:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:14,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:14,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970017460] [2022-01-18 17:18:14,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970017460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882345003] [2022-01-18 17:18:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:18:14,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:14,346 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:14,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 17:18:14,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:18:14,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:18:14,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:18:14,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:14,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:14,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:18:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:15,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:15,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:15,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:15,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 165 [2022-01-18 17:18:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:16,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882345003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:16,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:16,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:18:16,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479923476] [2022-01-18 17:18:16,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:16,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:18:16,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:18:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:18:16,754 INFO L87 Difference]: Start difference. First operand 2765 states and 9992 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:18:20,105 INFO L93 Difference]: Finished difference Result 5206 states and 17425 transitions. [2022-01-18 17:18:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:18:20,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:18:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:18:20,115 INFO L225 Difference]: With dead ends: 5206 [2022-01-18 17:18:20,115 INFO L226 Difference]: Without dead ends: 5191 [2022-01-18 17:18:20,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=888, Invalid=3534, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:18:20,116 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 429 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:18:20,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 325 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1027 Invalid, 0 Unknown, 189 Unchecked, 0.6s Time] [2022-01-18 17:18:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2022-01-18 17:18:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 2767. [2022-01-18 17:18:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 3.615690527838033) internal successors, (10001), 2766 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 10001 transitions. [2022-01-18 17:18:20,176 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 10001 transitions. Word has length 26 [2022-01-18 17:18:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:18:20,176 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 10001 transitions. [2022-01-18 17:18:20,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 10001 transitions. [2022-01-18 17:18:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:18:20,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:18:20,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:18:20,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 17:18:20,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 17:18:20,396 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2130990306, now seen corresponding path program 37 times [2022-01-18 17:18:20,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:20,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234393910] [2022-01-18 17:18:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:20,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:20,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234393910] [2022-01-18 17:18:20,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234393910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771655236] [2022-01-18 17:18:20,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:18:20,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:20,745 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:20,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 17:18:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:18:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:21,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:21,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:21,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:18:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:21,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:21,930 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:18:21,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:18:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:22,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771655236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:22,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:22,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 17:18:22,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803750453] [2022-01-18 17:18:22,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:22,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:18:22,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:18:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:18:22,311 INFO L87 Difference]: Start difference. First operand 2767 states and 10001 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:18:24,282 INFO L93 Difference]: Finished difference Result 4498 states and 15361 transitions. [2022-01-18 17:18:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:18:24,282 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:18:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:18:24,289 INFO L225 Difference]: With dead ends: 4498 [2022-01-18 17:18:24,289 INFO L226 Difference]: Without dead ends: 4468 [2022-01-18 17:18:24,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:18:24,294 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 282 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:18:24,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 258 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:18:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2022-01-18 17:18:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 2793. [2022-01-18 17:18:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.611031518624642) internal successors, (10082), 2792 states have internal predecessors, (10082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10082 transitions. [2022-01-18 17:18:24,340 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10082 transitions. Word has length 26 [2022-01-18 17:18:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:18:24,340 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 10082 transitions. [2022-01-18 17:18:24,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10082 transitions. [2022-01-18 17:18:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:18:24,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:18:24,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:18:24,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 17:18:24,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 17:18:24,559 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:24,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1013224948, now seen corresponding path program 38 times [2022-01-18 17:18:24,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275604154] [2022-01-18 17:18:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:24,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:24,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275604154] [2022-01-18 17:18:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275604154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29924439] [2022-01-18 17:18:24,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:18:24,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:24,825 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:24,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 17:18:24,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:18:24,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:18:24,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:18:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:25,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:25,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-01-18 17:18:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:25,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:26,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:26,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:26,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 143 [2022-01-18 17:18:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:26,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29924439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:26,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:26,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:18:26,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152330761] [2022-01-18 17:18:26,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:26,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:18:26,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:18:26,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:18:26,412 INFO L87 Difference]: Start difference. First operand 2793 states and 10082 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:18:31,170 INFO L93 Difference]: Finished difference Result 4621 states and 15671 transitions. [2022-01-18 17:18:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:18:31,170 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:18:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:18:31,178 INFO L225 Difference]: With dead ends: 4621 [2022-01-18 17:18:31,178 INFO L226 Difference]: Without dead ends: 4491 [2022-01-18 17:18:31,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=950, Invalid=4600, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:18:31,178 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 346 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:18:31,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 294 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:18:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-01-18 17:18:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 2847. [2022-01-18 17:18:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 3.5934645115952213) internal successors, (10227), 2846 states have internal predecessors, (10227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 10227 transitions. [2022-01-18 17:18:31,223 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 10227 transitions. Word has length 26 [2022-01-18 17:18:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:18:31,223 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 10227 transitions. [2022-01-18 17:18:31,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 10227 transitions. [2022-01-18 17:18:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:18:31,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:18:31,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:18:31,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 17:18:31,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:31,451 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 39 times [2022-01-18 17:18:31,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94558160] [2022-01-18 17:18:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:31,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:31,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:31,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94558160] [2022-01-18 17:18:31,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94558160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:31,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365013510] [2022-01-18 17:18:31,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:18:31,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:31,672 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:31,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 17:18:31,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:18:31,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:18:31,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:18:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:32,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:32,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:32,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 111 [2022-01-18 17:18:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:33,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:34,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:34,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:34,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:34,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:34,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 93 [2022-01-18 17:18:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:34,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365013510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:34,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:34,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-01-18 17:18:34,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139672065] [2022-01-18 17:18:34,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:34,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:18:34,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:18:34,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:18:34,763 INFO L87 Difference]: Start difference. First operand 2847 states and 10227 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:18:39,106 INFO L93 Difference]: Finished difference Result 5397 states and 18244 transitions. [2022-01-18 17:18:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 17:18:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:18:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:18:39,116 INFO L225 Difference]: With dead ends: 5397 [2022-01-18 17:18:39,116 INFO L226 Difference]: Without dead ends: 5346 [2022-01-18 17:18:39,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1213, Invalid=6443, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 17:18:39,117 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 448 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:18:39,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 483 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1437 Invalid, 0 Unknown, 902 Unchecked, 0.7s Time] [2022-01-18 17:18:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2022-01-18 17:18:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 2934. [2022-01-18 17:18:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2933 states have (on average 3.5819979543129903) internal successors, (10506), 2933 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 10506 transitions. [2022-01-18 17:18:39,195 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 10506 transitions. Word has length 26 [2022-01-18 17:18:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:18:39,196 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 10506 transitions. [2022-01-18 17:18:39,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 10506 transitions. [2022-01-18 17:18:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:18:39,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:18:39,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:18:39,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 17:18:39,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 17:18:39,415 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1528867272, now seen corresponding path program 40 times [2022-01-18 17:18:39,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:39,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263377840] [2022-01-18 17:18:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:39,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:39,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:39,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263377840] [2022-01-18 17:18:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263377840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:39,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34919029] [2022-01-18 17:18:39,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:18:39,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:39,599 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:39,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 17:18:39,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:18:39,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:18:39,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:18:39,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:40,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:40,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:40,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-01-18 17:18:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:40,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:40,703 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:18:40,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 153 [2022-01-18 17:18:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:41,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34919029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:41,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:41,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 17:18:41,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761694716] [2022-01-18 17:18:41,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:18:41,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:18:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:18:41,211 INFO L87 Difference]: Start difference. First operand 2934 states and 10506 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:18:44,236 INFO L93 Difference]: Finished difference Result 4801 states and 16262 transitions. [2022-01-18 17:18:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:18:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:18:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:18:44,246 INFO L225 Difference]: With dead ends: 4801 [2022-01-18 17:18:44,246 INFO L226 Difference]: Without dead ends: 4771 [2022-01-18 17:18:44,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=819, Invalid=4881, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:18:44,247 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 273 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:18:44,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 444 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1687 Invalid, 0 Unknown, 65 Unchecked, 0.8s Time] [2022-01-18 17:18:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2022-01-18 17:18:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2983. [2022-01-18 17:18:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.5710932260228034) internal successors, (10649), 2982 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 10649 transitions. [2022-01-18 17:18:44,307 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 10649 transitions. Word has length 26 [2022-01-18 17:18:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:18:44,307 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 10649 transitions. [2022-01-18 17:18:44,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:18:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 10649 transitions. [2022-01-18 17:18:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:18:44,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:18:44,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:18:44,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 17:18:44,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 17:18:44,522 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:18:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:18:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 27 times [2022-01-18 17:18:44,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:18:44,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155331153] [2022-01-18 17:18:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:18:44,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:18:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:18:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:44,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:18:44,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155331153] [2022-01-18 17:18:44,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155331153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:18:44,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940471631] [2022-01-18 17:18:44,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:18:44,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:18:44,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:18:44,819 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:18:44,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:18:44,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:18:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:18:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:18:44,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 17:18:45,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:18:45,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:18:45,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:18:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:46,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:18:46,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:18:46,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 169 [2022-01-18 17:18:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:18:57,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940471631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:18:57,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:18:57,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:18:57,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943214404] [2022-01-18 17:18:57,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:18:57,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:18:57,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:18:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:18:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:18:57,292 INFO L87 Difference]: Start difference. First operand 2983 states and 10649 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:19:00,981 INFO L93 Difference]: Finished difference Result 6027 states and 19657 transitions. [2022-01-18 17:19:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:19:00,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:19:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:19:00,994 INFO L225 Difference]: With dead ends: 6027 [2022-01-18 17:19:00,994 INFO L226 Difference]: Without dead ends: 5997 [2022-01-18 17:19:00,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1044, Invalid=3512, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:19:00,995 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 506 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:19:00,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 261 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 808 Invalid, 0 Unknown, 285 Unchecked, 0.6s Time] [2022-01-18 17:19:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5997 states. [2022-01-18 17:19:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5997 to 3026. [2022-01-18 17:19:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 3.5798347107438016) internal successors, (10829), 3025 states have internal predecessors, (10829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 10829 transitions. [2022-01-18 17:19:01,072 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 10829 transitions. Word has length 26 [2022-01-18 17:19:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:19:01,073 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 10829 transitions. [2022-01-18 17:19:01,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 10829 transitions. [2022-01-18 17:19:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:19:01,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:19:01,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:19:01,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 17:19:01,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 17:19:01,294 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:19:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:19:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1056144568, now seen corresponding path program 28 times [2022-01-18 17:19:01,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:19:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889427333] [2022-01-18 17:19:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:19:01,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:19:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:19:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:01,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:19:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889427333] [2022-01-18 17:19:01,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889427333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:19:01,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369731667] [2022-01-18 17:19:01,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:19:01,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:01,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:19:01,648 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:19:01,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 17:19:01,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:19:01,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:19:01,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:19:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:19:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:19:02,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:02,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:19:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:02,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:19:03,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:03,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:03,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 203 treesize of output 169 [2022-01-18 17:19:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:05,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369731667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:19:05,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:19:05,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:19:05,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054227111] [2022-01-18 17:19:05,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:19:05,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:19:05,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:19:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:19:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:19:05,132 INFO L87 Difference]: Start difference. First operand 3026 states and 10829 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:19:09,832 INFO L93 Difference]: Finished difference Result 6258 states and 20368 transitions. [2022-01-18 17:19:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:19:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:19:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:19:09,846 INFO L225 Difference]: With dead ends: 6258 [2022-01-18 17:19:09,846 INFO L226 Difference]: Without dead ends: 6228 [2022-01-18 17:19:09,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1051, Invalid=3505, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:19:09,847 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 456 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:19:09,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 430 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1312 Invalid, 0 Unknown, 248 Unchecked, 0.9s Time] [2022-01-18 17:19:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6228 states. [2022-01-18 17:19:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6228 to 3086. [2022-01-18 17:19:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3085 states have (on average 3.581847649918963) internal successors, (11050), 3085 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 11050 transitions. [2022-01-18 17:19:09,919 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 11050 transitions. Word has length 26 [2022-01-18 17:19:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:19:09,919 INFO L470 AbstractCegarLoop]: Abstraction has 3086 states and 11050 transitions. [2022-01-18 17:19:09,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 11050 transitions. [2022-01-18 17:19:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:19:09,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:19:09,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:19:09,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 17:19:10,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-01-18 17:19:10,159 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:19:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:19:10,160 INFO L85 PathProgramCache]: Analyzing trace with hash -561388212, now seen corresponding path program 29 times [2022-01-18 17:19:10,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:19:10,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729821389] [2022-01-18 17:19:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:19:10,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:19:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:19:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:10,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:19:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729821389] [2022-01-18 17:19:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729821389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:19:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951687986] [2022-01-18 17:19:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:19:10,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:19:10,414 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:19:10,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 17:19:10,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:19:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:19:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:19:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:19:10,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:19:10,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:10,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:19:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:11,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:19:11,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:11,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:11,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 181 [2022-01-18 17:19:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:13,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951687986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:19:13,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:19:13,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:19:13,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591682869] [2022-01-18 17:19:13,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:19:13,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:19:13,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:19:13,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:19:13,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:19:13,700 INFO L87 Difference]: Start difference. First operand 3086 states and 11050 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:19:23,377 INFO L93 Difference]: Finished difference Result 7294 states and 23620 transitions. [2022-01-18 17:19:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:19:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:19:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:19:23,392 INFO L225 Difference]: With dead ends: 7294 [2022-01-18 17:19:23,392 INFO L226 Difference]: Without dead ends: 7249 [2022-01-18 17:19:23,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2031, Invalid=8271, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 17:19:23,393 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 729 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 855 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:19:23,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 465 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1094 Invalid, 0 Unknown, 855 Unchecked, 0.8s Time] [2022-01-18 17:19:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7249 states. [2022-01-18 17:19:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7249 to 3141. [2022-01-18 17:19:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 3.5929936305732486) internal successors, (11282), 3140 states have internal predecessors, (11282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 11282 transitions. [2022-01-18 17:19:23,473 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 11282 transitions. Word has length 26 [2022-01-18 17:19:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:19:23,473 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 11282 transitions. [2022-01-18 17:19:23,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 11282 transitions. [2022-01-18 17:19:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:19:23,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:19:23,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:19:23,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 17:19:23,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:23,686 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:19:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:19:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash 238453832, now seen corresponding path program 30 times [2022-01-18 17:19:23,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:19:23,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853386016] [2022-01-18 17:19:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:19:23,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:19:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:19:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:23,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:19:23,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853386016] [2022-01-18 17:19:23,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853386016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:19:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448902650] [2022-01-18 17:19:23,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:19:23,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:19:23,980 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:19:23,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 17:19:24,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:19:24,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:19:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:19:24,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:19:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:19:24,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:19:24,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:24,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 85 [2022-01-18 17:19:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:25,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:19:25,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:25,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:25,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 181 [2022-01-18 17:19:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:28,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448902650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:19:28,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:19:28,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:19:28,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123194577] [2022-01-18 17:19:28,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:19:28,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:19:28,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:19:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:19:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:19:28,327 INFO L87 Difference]: Start difference. First operand 3141 states and 11282 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:19:35,139 INFO L93 Difference]: Finished difference Result 7019 states and 22861 transitions. [2022-01-18 17:19:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 17:19:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:19:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:19:35,153 INFO L225 Difference]: With dead ends: 7019 [2022-01-18 17:19:35,153 INFO L226 Difference]: Without dead ends: 6985 [2022-01-18 17:19:35,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1441, Invalid=5201, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:19:35,154 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 610 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:19:35,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 472 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1564 Invalid, 0 Unknown, 198 Unchecked, 1.0s Time] [2022-01-18 17:19:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6985 states. [2022-01-18 17:19:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6985 to 3102. [2022-01-18 17:19:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.5872299258303775) internal successors, (11124), 3101 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 11124 transitions. [2022-01-18 17:19:35,234 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 11124 transitions. Word has length 26 [2022-01-18 17:19:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:19:35,234 INFO L470 AbstractCegarLoop]: Abstraction has 3102 states and 11124 transitions. [2022-01-18 17:19:35,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 11124 transitions. [2022-01-18 17:19:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:19:35,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:19:35,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:19:35,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 17:19:35,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:35,443 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:19:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:19:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash 631833332, now seen corresponding path program 31 times [2022-01-18 17:19:35,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:19:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522056590] [2022-01-18 17:19:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:19:35,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:19:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:19:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:35,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:19:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522056590] [2022-01-18 17:19:35,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522056590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:19:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697740960] [2022-01-18 17:19:35,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:19:35,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:19:35,821 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:19:35,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 17:19:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:19:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:19:35,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:19:37,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:19:37,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:19:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:37,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:19:38,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:38,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 173 [2022-01-18 17:19:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:40,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697740960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:19:40,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:19:40,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:19:40,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739679074] [2022-01-18 17:19:40,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:19:40,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:19:40,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:19:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:19:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:19:40,876 INFO L87 Difference]: Start difference. First operand 3102 states and 11124 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:19:43,208 INFO L93 Difference]: Finished difference Result 6009 states and 19708 transitions. [2022-01-18 17:19:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:19:43,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:19:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:19:43,219 INFO L225 Difference]: With dead ends: 6009 [2022-01-18 17:19:43,219 INFO L226 Difference]: Without dead ends: 5940 [2022-01-18 17:19:43,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:19:43,219 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 295 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:19:43,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 451 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 913 Invalid, 0 Unknown, 194 Unchecked, 0.5s Time] [2022-01-18 17:19:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2022-01-18 17:19:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 3238. [2022-01-18 17:19:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 3.5974667902378745) internal successors, (11645), 3237 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 11645 transitions. [2022-01-18 17:19:43,309 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 11645 transitions. Word has length 26 [2022-01-18 17:19:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:19:43,309 INFO L470 AbstractCegarLoop]: Abstraction has 3238 states and 11645 transitions. [2022-01-18 17:19:43,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 11645 transitions. [2022-01-18 17:19:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:19:43,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:19:43,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:19:43,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 17:19:43,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:43,528 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:19:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:19:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash -862074390, now seen corresponding path program 32 times [2022-01-18 17:19:43,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:19:43,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933105254] [2022-01-18 17:19:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:19:43,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:19:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:19:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:43,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:19:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933105254] [2022-01-18 17:19:43,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933105254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:19:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117849261] [2022-01-18 17:19:43,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:19:43,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:19:43,883 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:19:43,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 17:19:43,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:19:43,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:19:43,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:19:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:19:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:19:44,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:19:44,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:44,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:19:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:45,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:19:45,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:45,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:45,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 145 [2022-01-18 17:19:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:46,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117849261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:19:46,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:19:46,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 17:19:46,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878907977] [2022-01-18 17:19:46,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:19:46,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:19:46,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:19:46,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:19:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:19:46,576 INFO L87 Difference]: Start difference. First operand 3238 states and 11645 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:19:56,314 INFO L93 Difference]: Finished difference Result 7392 states and 24631 transitions. [2022-01-18 17:19:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 17:19:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:19:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:19:56,327 INFO L225 Difference]: With dead ends: 7392 [2022-01-18 17:19:56,327 INFO L226 Difference]: Without dead ends: 7347 [2022-01-18 17:19:56,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7312 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2310, Invalid=16872, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 17:19:56,328 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 579 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1759 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:19:56,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 979 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1705 Invalid, 0 Unknown, 1759 Unchecked, 1.1s Time] [2022-01-18 17:19:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7347 states. [2022-01-18 17:19:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7347 to 3275. [2022-01-18 17:19:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 3.6020158827122786) internal successors, (11793), 3274 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:56,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 11793 transitions. [2022-01-18 17:19:56,400 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 11793 transitions. Word has length 26 [2022-01-18 17:19:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:19:56,400 INFO L470 AbstractCegarLoop]: Abstraction has 3275 states and 11793 transitions. [2022-01-18 17:19:56,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:19:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 11793 transitions. [2022-01-18 17:19:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:19:56,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:19:56,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:19:56,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 17:19:56,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 17:19:56,619 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:19:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:19:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash -985699448, now seen corresponding path program 33 times [2022-01-18 17:19:56,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:19:56,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328850837] [2022-01-18 17:19:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:19:56,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:19:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:19:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:57,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:19:57,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328850837] [2022-01-18 17:19:57,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328850837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:19:57,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669757300] [2022-01-18 17:19:57,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:19:57,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:19:57,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:19:57,016 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:19:57,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 17:19:57,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:19:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:19:57,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:19:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:19:57,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:57,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:19:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:58,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:19:58,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:58,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:19:58,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:19:58,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-01-18 17:19:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:19:59,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669757300] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:19:59,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:19:59,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 17:19:59,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488674599] [2022-01-18 17:19:59,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:19:59,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:19:59,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:19:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:19:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:19:59,348 INFO L87 Difference]: Start difference. First operand 3275 states and 11793 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:20:07,333 INFO L93 Difference]: Finished difference Result 6743 states and 22901 transitions. [2022-01-18 17:20:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 17:20:07,333 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:20:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:20:07,345 INFO L225 Difference]: With dead ends: 6743 [2022-01-18 17:20:07,345 INFO L226 Difference]: Without dead ends: 6697 [2022-01-18 17:20:07,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2072, Invalid=10138, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 17:20:07,346 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 470 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:20:07,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 535 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1288 Invalid, 0 Unknown, 547 Unchecked, 0.8s Time] [2022-01-18 17:20:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6697 states. [2022-01-18 17:20:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6697 to 3306. [2022-01-18 17:20:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.605446293494705) internal successors, (11916), 3305 states have internal predecessors, (11916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11916 transitions. [2022-01-18 17:20:07,416 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11916 transitions. Word has length 26 [2022-01-18 17:20:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:20:07,416 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 11916 transitions. [2022-01-18 17:20:07,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11916 transitions. [2022-01-18 17:20:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:20:07,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:20:07,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:20:07,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 17:20:07,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:07,635 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:20:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:20:07,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 34 times [2022-01-18 17:20:07,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:20:07,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79593504] [2022-01-18 17:20:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:20:07,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:20:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:20:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:07,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:20:07,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79593504] [2022-01-18 17:20:07,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79593504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:20:07,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875197911] [2022-01-18 17:20:07,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:20:07,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:07,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:20:07,886 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:20:07,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 17:20:07,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:20:07,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:20:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:20:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:20:08,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:20:08,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:20:08,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:20:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:08,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:20:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:20:08,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:20:08,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 241 treesize of output 181 [2022-01-18 17:20:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:10,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875197911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:20:10,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:20:10,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:20:10,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077247002] [2022-01-18 17:20:10,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:20:10,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:20:10,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:20:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:20:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:20:10,579 INFO L87 Difference]: Start difference. First operand 3306 states and 11916 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:20:15,032 INFO L93 Difference]: Finished difference Result 6291 states and 20823 transitions. [2022-01-18 17:20:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:20:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:20:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:20:15,043 INFO L225 Difference]: With dead ends: 6291 [2022-01-18 17:20:15,043 INFO L226 Difference]: Without dead ends: 6194 [2022-01-18 17:20:15,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=963, Invalid=4007, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:20:15,045 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 438 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:20:15,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 433 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1231 Invalid, 0 Unknown, 495 Unchecked, 0.7s Time] [2022-01-18 17:20:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2022-01-18 17:20:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 3301. [2022-01-18 17:20:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3301 states, 3300 states have (on average 3.6081818181818184) internal successors, (11907), 3300 states have internal predecessors, (11907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 11907 transitions. [2022-01-18 17:20:15,107 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 11907 transitions. Word has length 26 [2022-01-18 17:20:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:20:15,107 INFO L470 AbstractCegarLoop]: Abstraction has 3301 states and 11907 transitions. [2022-01-18 17:20:15,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 11907 transitions. [2022-01-18 17:20:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:20:15,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:20:15,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:20:15,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 17:20:15,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:15,323 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:20:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:20:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1873169776, now seen corresponding path program 41 times [2022-01-18 17:20:15,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:20:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936368238] [2022-01-18 17:20:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:20:15,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:20:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:20:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:15,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:20:15,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936368238] [2022-01-18 17:20:15,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936368238] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:20:15,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694636668] [2022-01-18 17:20:15,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:20:15,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:15,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:20:15,699 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:20:15,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:20:15,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:20:15,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 17:20:15,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:20:15,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:20:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:20:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:20:16,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:20:16,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:20:16,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:20:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:16,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:20:16,856 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:20:16,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-01-18 17:20:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:17,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694636668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:20:17,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:20:17,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 17:20:17,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376569919] [2022-01-18 17:20:17,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:20:17,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:20:17,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:20:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:20:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:20:17,520 INFO L87 Difference]: Start difference. First operand 3301 states and 11907 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:20:21,591 INFO L93 Difference]: Finished difference Result 5432 states and 18463 transitions. [2022-01-18 17:20:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:20:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:20:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:20:21,600 INFO L225 Difference]: With dead ends: 5432 [2022-01-18 17:20:21,600 INFO L226 Difference]: Without dead ends: 5319 [2022-01-18 17:20:21,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 17:20:21,601 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 336 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:20:21,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 436 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:20:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2022-01-18 17:20:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 3318. [2022-01-18 17:20:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 3317 states have (on average 3.605969249321676) internal successors, (11961), 3317 states have internal predecessors, (11961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 11961 transitions. [2022-01-18 17:20:21,655 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 11961 transitions. Word has length 26 [2022-01-18 17:20:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:20:21,655 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 11961 transitions. [2022-01-18 17:20:21,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 11961 transitions. [2022-01-18 17:20:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:20:21,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:20:21,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:20:21,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 17:20:21,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 17:20:21,870 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:20:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:20:21,870 INFO L85 PathProgramCache]: Analyzing trace with hash 471026418, now seen corresponding path program 42 times [2022-01-18 17:20:21,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:20:21,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748542273] [2022-01-18 17:20:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:20:21,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:20:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:20:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:22,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:20:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748542273] [2022-01-18 17:20:22,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748542273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:20:22,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391320637] [2022-01-18 17:20:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:20:22,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:20:22,256 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:20:22,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 17:20:22,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:20:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:20:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:20:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:20:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:20:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:20:22,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:20:22,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2022-01-18 17:20:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:23,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:20:23,556 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:20:23,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:20:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:24,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391320637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:20:24,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:20:24,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:20:24,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767279784] [2022-01-18 17:20:24,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:20:24,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:20:24,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:20:24,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:20:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:20:24,049 INFO L87 Difference]: Start difference. First operand 3318 states and 11961 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:20:31,429 INFO L93 Difference]: Finished difference Result 7470 states and 24823 transitions. [2022-01-18 17:20:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 17:20:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:20:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:20:31,443 INFO L225 Difference]: With dead ends: 7470 [2022-01-18 17:20:31,443 INFO L226 Difference]: Without dead ends: 7426 [2022-01-18 17:20:31,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4737 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2597, Invalid=9835, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 17:20:31,444 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 601 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:20:31,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 447 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:20:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2022-01-18 17:20:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 3332. [2022-01-18 17:20:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 3.60402281597118) internal successors, (12005), 3331 states have internal predecessors, (12005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 12005 transitions. [2022-01-18 17:20:31,530 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 12005 transitions. Word has length 26 [2022-01-18 17:20:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:20:31,531 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 12005 transitions. [2022-01-18 17:20:31,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 12005 transitions. [2022-01-18 17:20:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:20:31,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:20:31,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:20:31,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 17:20:31,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 17:20:31,751 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:20:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:20:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1954161356, now seen corresponding path program 43 times [2022-01-18 17:20:31,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:20:31,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809348300] [2022-01-18 17:20:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:20:31,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:20:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:20:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:32,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:20:32,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809348300] [2022-01-18 17:20:32,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809348300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:20:32,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146155159] [2022-01-18 17:20:32,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:20:32,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:32,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:20:32,112 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:20:32,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 17:20:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:20:32,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:20:32,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:20:32,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:20:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:20:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:20:32,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 75 [2022-01-18 17:20:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:32,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:20:33,149 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:20:33,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:20:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146155159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:20:33,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:20:33,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:20:33,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76683237] [2022-01-18 17:20:33,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:20:33,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:20:33,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:20:33,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:20:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:20:33,753 INFO L87 Difference]: Start difference. First operand 3332 states and 12005 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:20:41,611 INFO L93 Difference]: Finished difference Result 6492 states and 21819 transitions. [2022-01-18 17:20:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-18 17:20:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:20:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:20:41,623 INFO L225 Difference]: With dead ends: 6492 [2022-01-18 17:20:41,623 INFO L226 Difference]: Without dead ends: 6462 [2022-01-18 17:20:41,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5854 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2577, Invalid=12185, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 17:20:41,624 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 567 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:20:41,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 563 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2090 Invalid, 0 Unknown, 91 Unchecked, 1.1s Time] [2022-01-18 17:20:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-01-18 17:20:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 3317. [2022-01-18 17:20:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 3.6022316043425815) internal successors, (11945), 3316 states have internal predecessors, (11945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 11945 transitions. [2022-01-18 17:20:41,689 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 11945 transitions. Word has length 26 [2022-01-18 17:20:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:20:41,689 INFO L470 AbstractCegarLoop]: Abstraction has 3317 states and 11945 transitions. [2022-01-18 17:20:41,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 11945 transitions. [2022-01-18 17:20:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:20:41,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:20:41,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:20:41,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 17:20:41,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:41,907 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:20:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:20:41,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1160998976, now seen corresponding path program 35 times [2022-01-18 17:20:41,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:20:41,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383387037] [2022-01-18 17:20:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:20:41,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:20:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:20:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:42,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:20:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383387037] [2022-01-18 17:20:42,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383387037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:20:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817880732] [2022-01-18 17:20:42,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:20:42,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:42,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:20:42,237 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:20:42,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 17:20:42,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:20:42,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:20:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:20:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:20:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:20:42,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:20:42,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:20:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:43,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:20:44,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:20:44,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 169 [2022-01-18 17:20:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:46,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817880732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:20:46,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:20:46,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:20:46,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109016755] [2022-01-18 17:20:46,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:20:46,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:20:46,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:20:46,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:20:46,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:20:46,647 INFO L87 Difference]: Start difference. First operand 3317 states and 11945 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:20:59,315 INFO L93 Difference]: Finished difference Result 8853 states and 28739 transitions. [2022-01-18 17:20:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 17:20:59,315 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:20:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:20:59,330 INFO L225 Difference]: With dead ends: 8853 [2022-01-18 17:20:59,330 INFO L226 Difference]: Without dead ends: 8806 [2022-01-18 17:20:59,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6256 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2532, Invalid=12720, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 17:20:59,332 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 654 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:20:59,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 411 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1143 Invalid, 0 Unknown, 598 Unchecked, 0.8s Time] [2022-01-18 17:20:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8806 states. [2022-01-18 17:20:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8806 to 3429. [2022-01-18 17:20:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.615227537922987) internal successors, (12393), 3428 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12393 transitions. [2022-01-18 17:20:59,433 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12393 transitions. Word has length 26 [2022-01-18 17:20:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:20:59,433 INFO L470 AbstractCegarLoop]: Abstraction has 3429 states and 12393 transitions. [2022-01-18 17:20:59,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:20:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12393 transitions. [2022-01-18 17:20:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:20:59,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:20:59,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:20:59,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 17:20:59,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:59,653 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:20:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:20:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash 96228536, now seen corresponding path program 36 times [2022-01-18 17:20:59,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:20:59,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551456287] [2022-01-18 17:20:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:20:59,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:20:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:20:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:20:59,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:20:59,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551456287] [2022-01-18 17:20:59,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551456287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:20:59,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633235006] [2022-01-18 17:20:59,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:20:59,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:20:59,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:20:59,887 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:20:59,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 17:20:59,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:20:59,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:20:59,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:20:59,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:00,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:00,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:00,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:21:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:00,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:00,861 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:21:00,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:21:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:02,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633235006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:02,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:02,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:21:02,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094392483] [2022-01-18 17:21:02,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:02,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:21:02,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:21:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:21:02,108 INFO L87 Difference]: Start difference. First operand 3429 states and 12393 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:05,416 INFO L93 Difference]: Finished difference Result 5805 states and 19652 transitions. [2022-01-18 17:21:05,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:21:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:05,427 INFO L225 Difference]: With dead ends: 5805 [2022-01-18 17:21:05,427 INFO L226 Difference]: Without dead ends: 5768 [2022-01-18 17:21:05,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=693, Invalid=4563, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:21:05,427 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 307 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:05,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 356 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:21:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5768 states. [2022-01-18 17:21:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5768 to 3411. [2022-01-18 17:21:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.6173020527859236) internal successors, (12335), 3410 states have internal predecessors, (12335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 12335 transitions. [2022-01-18 17:21:05,511 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 12335 transitions. Word has length 26 [2022-01-18 17:21:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:05,511 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 12335 transitions. [2022-01-18 17:21:05,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 12335 transitions. [2022-01-18 17:21:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:05,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:05,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:05,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 17:21:05,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-18 17:21:05,732 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1193122220, now seen corresponding path program 37 times [2022-01-18 17:21:05,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:05,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071958182] [2022-01-18 17:21:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:05,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:05,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:05,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071958182] [2022-01-18 17:21:05,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071958182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:05,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660533914] [2022-01-18 17:21:05,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:21:05,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:05,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:05,868 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:05,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 17:21:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:21:05,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:06,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:06,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:06,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:21:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:06,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:06,657 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:21:06,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 157 [2022-01-18 17:21:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:07,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660533914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:07,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:07,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:21:07,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761219394] [2022-01-18 17:21:07,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:07,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:21:07,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:21:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:21:07,567 INFO L87 Difference]: Start difference. First operand 3411 states and 12335 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:11,965 INFO L93 Difference]: Finished difference Result 6477 states and 21608 transitions. [2022-01-18 17:21:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:21:11,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:11,976 INFO L225 Difference]: With dead ends: 6477 [2022-01-18 17:21:11,976 INFO L226 Difference]: Without dead ends: 6366 [2022-01-18 17:21:11,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1044, Invalid=5598, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:21:11,977 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 344 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:11,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 395 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:21:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-01-18 17:21:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 3407. [2022-01-18 17:21:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 3.6174398120963005) internal successors, (12321), 3406 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 12321 transitions. [2022-01-18 17:21:12,063 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 12321 transitions. Word has length 26 [2022-01-18 17:21:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:12,063 INFO L470 AbstractCegarLoop]: Abstraction has 3407 states and 12321 transitions. [2022-01-18 17:21:12,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 12321 transitions. [2022-01-18 17:21:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:12,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:12,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:12,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 17:21:12,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:12,275 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1298273478, now seen corresponding path program 38 times [2022-01-18 17:21:12,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:12,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809799042] [2022-01-18 17:21:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:12,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:12,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:12,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809799042] [2022-01-18 17:21:12,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809799042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:12,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20571095] [2022-01-18 17:21:12,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:21:12,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:12,446 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:12,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 17:21:12,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:21:12,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:21:12,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:21:12,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:12,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:12,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:21:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:13,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:13,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-01-18 17:21:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:16,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20571095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:16,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:16,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-18 17:21:16,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830503655] [2022-01-18 17:21:16,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:16,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:21:16,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:21:16,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:21:16,640 INFO L87 Difference]: Start difference. First operand 3407 states and 12321 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:20,788 INFO L93 Difference]: Finished difference Result 5631 states and 18958 transitions. [2022-01-18 17:21:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:21:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:20,798 INFO L225 Difference]: With dead ends: 5631 [2022-01-18 17:21:20,798 INFO L226 Difference]: Without dead ends: 5580 [2022-01-18 17:21:20,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=793, Invalid=3763, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:21:20,799 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 341 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:20,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 384 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1369 Invalid, 0 Unknown, 155 Unchecked, 0.8s Time] [2022-01-18 17:21:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2022-01-18 17:21:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 3462. [2022-01-18 17:21:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 3.6177405374169314) internal successors, (12521), 3461 states have internal predecessors, (12521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 12521 transitions. [2022-01-18 17:21:20,860 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 12521 transitions. Word has length 26 [2022-01-18 17:21:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:20,860 INFO L470 AbstractCegarLoop]: Abstraction has 3462 states and 12521 transitions. [2022-01-18 17:21:20,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 12521 transitions. [2022-01-18 17:21:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:20,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:20,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:20,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 17:21:21,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:21,070 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:21,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:21,070 INFO L85 PathProgramCache]: Analyzing trace with hash -619873932, now seen corresponding path program 39 times [2022-01-18 17:21:21,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:21,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100658431] [2022-01-18 17:21:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:21,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:21,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100658431] [2022-01-18 17:21:21,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100658431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610726114] [2022-01-18 17:21:21,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:21:21,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:21,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:21,289 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:21,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 17:21:21,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:21:21,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:21:21,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:21:21,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:22,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:21:22,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:22,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:21:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:22,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:23,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:23,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-01-18 17:21:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:31,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610726114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:31,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:31,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:21:31,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162181975] [2022-01-18 17:21:31,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:31,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:21:31,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:21:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:21:31,655 INFO L87 Difference]: Start difference. First operand 3462 states and 12521 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:34,109 INFO L93 Difference]: Finished difference Result 5326 states and 18167 transitions. [2022-01-18 17:21:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:21:34,110 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:34,119 INFO L225 Difference]: With dead ends: 5326 [2022-01-18 17:21:34,119 INFO L226 Difference]: Without dead ends: 5284 [2022-01-18 17:21:34,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:21:34,120 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 293 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:34,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 270 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 894 Invalid, 0 Unknown, 368 Unchecked, 0.5s Time] [2022-01-18 17:21:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2022-01-18 17:21:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 3478. [2022-01-18 17:21:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 3.616623526028185) internal successors, (12575), 3477 states have internal predecessors, (12575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 12575 transitions. [2022-01-18 17:21:34,179 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 12575 transitions. Word has length 26 [2022-01-18 17:21:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:34,180 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 12575 transitions. [2022-01-18 17:21:34,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 12575 transitions. [2022-01-18 17:21:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:34,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:34,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:34,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 17:21:34,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-01-18 17:21:34,395 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:34,395 INFO L85 PathProgramCache]: Analyzing trace with hash -99997454, now seen corresponding path program 40 times [2022-01-18 17:21:34,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:34,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581625455] [2022-01-18 17:21:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:34,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:34,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581625455] [2022-01-18 17:21:34,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581625455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467695466] [2022-01-18 17:21:34,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:21:34,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:34,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:34,656 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:34,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 17:21:34,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:21:34,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:21:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:21:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:34,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:34,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:34,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:21:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:35,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:35,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:21:35,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:35,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 161 [2022-01-18 17:21:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467695466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:37,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:37,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:21:37,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231617169] [2022-01-18 17:21:37,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:37,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:21:37,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:37,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:21:37,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:21:37,829 INFO L87 Difference]: Start difference. First operand 3478 states and 12575 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:40,587 INFO L93 Difference]: Finished difference Result 5614 states and 19217 transitions. [2022-01-18 17:21:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:21:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:40,596 INFO L225 Difference]: With dead ends: 5614 [2022-01-18 17:21:40,596 INFO L226 Difference]: Without dead ends: 5580 [2022-01-18 17:21:40,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=644, Invalid=2896, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:21:40,597 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 254 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:40,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 335 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 794 Invalid, 0 Unknown, 309 Unchecked, 0.5s Time] [2022-01-18 17:21:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2022-01-18 17:21:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 3455. [2022-01-18 17:21:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 3.615807759119861) internal successors, (12489), 3454 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 12489 transitions. [2022-01-18 17:21:40,656 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 12489 transitions. Word has length 26 [2022-01-18 17:21:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:40,657 INFO L470 AbstractCegarLoop]: Abstraction has 3455 states and 12489 transitions. [2022-01-18 17:21:40,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 12489 transitions. [2022-01-18 17:21:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:40,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:40,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:40,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 17:21:40,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:40,875 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 41 times [2022-01-18 17:21:40,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086126923] [2022-01-18 17:21:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:40,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:40,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:40,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086126923] [2022-01-18 17:21:40,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086126923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:40,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956483939] [2022-01-18 17:21:40,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:21:40,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:40,986 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:40,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 17:21:41,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:21:41,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:21:41,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:21:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:41,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:21:41,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:21:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:41,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:41,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:21:41,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:41,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:21:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:43,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956483939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:43,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:43,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:21:43,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196422924] [2022-01-18 17:21:43,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:43,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:21:43,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:43,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:21:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:21:43,621 INFO L87 Difference]: Start difference. First operand 3455 states and 12489 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:49,696 INFO L93 Difference]: Finished difference Result 6614 states and 21741 transitions. [2022-01-18 17:21:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 17:21:49,697 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:49,707 INFO L225 Difference]: With dead ends: 6614 [2022-01-18 17:21:49,708 INFO L226 Difference]: Without dead ends: 6496 [2022-01-18 17:21:49,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1754, Invalid=11586, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 17:21:49,708 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 449 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:49,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 425 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:21:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6496 states. [2022-01-18 17:21:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6496 to 3607. [2022-01-18 17:21:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3606 states have (on average 3.6181364392678868) internal successors, (13047), 3606 states have internal predecessors, (13047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 13047 transitions. [2022-01-18 17:21:49,773 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 13047 transitions. Word has length 26 [2022-01-18 17:21:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:49,774 INFO L470 AbstractCegarLoop]: Abstraction has 3607 states and 13047 transitions. [2022-01-18 17:21:49,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 13047 transitions. [2022-01-18 17:21:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:49,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:49,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:49,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 17:21:49,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:49,994 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 42 times [2022-01-18 17:21:49,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:49,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623092946] [2022-01-18 17:21:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:49,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:50,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623092946] [2022-01-18 17:21:50,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623092946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777025145] [2022-01-18 17:21:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:21:50,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:50,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:50,134 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:50,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 17:21:50,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:21:50,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:21:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:21:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:50,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:50,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:21:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:51,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:21:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:21:51,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:51,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-01-18 17:21:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:52,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777025145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:52,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:52,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2022-01-18 17:21:52,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673871360] [2022-01-18 17:21:52,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:52,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:21:52,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:52,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:21:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:21:52,154 INFO L87 Difference]: Start difference. First operand 3607 states and 13047 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:54,064 INFO L93 Difference]: Finished difference Result 6448 states and 22082 transitions. [2022-01-18 17:21:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:21:54,064 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:54,075 INFO L225 Difference]: With dead ends: 6448 [2022-01-18 17:21:54,075 INFO L226 Difference]: Without dead ends: 6418 [2022-01-18 17:21:54,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:21:54,076 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 453 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:54,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 273 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:21:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2022-01-18 17:21:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 3607. [2022-01-18 17:21:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3606 states have (on average 3.6181364392678868) internal successors, (13047), 3606 states have internal predecessors, (13047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 13047 transitions. [2022-01-18 17:21:54,141 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 13047 transitions. Word has length 26 [2022-01-18 17:21:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:54,141 INFO L470 AbstractCegarLoop]: Abstraction has 3607 states and 13047 transitions. [2022-01-18 17:21:54,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 13047 transitions. [2022-01-18 17:21:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:54,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:54,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:54,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 17:21:54,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 17:21:54,359 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 43 times [2022-01-18 17:21:54,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:54,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269436540] [2022-01-18 17:21:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:54,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:54,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:54,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269436540] [2022-01-18 17:21:54,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269436540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:54,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984851624] [2022-01-18 17:21:54,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:21:54,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:54,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:54,515 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:54,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 17:21:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:21:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:54,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:54,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:21:54,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:21:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:54,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:21:55,376 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:21:55,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-01-18 17:21:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:56,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984851624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:21:56,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:21:56,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:21:56,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113461206] [2022-01-18 17:21:56,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:21:56,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:21:56,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:21:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:21:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:21:56,550 INFO L87 Difference]: Start difference. First operand 3607 states and 13047 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:21:58,547 INFO L93 Difference]: Finished difference Result 5997 states and 20454 transitions. [2022-01-18 17:21:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:21:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:21:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:21:58,557 INFO L225 Difference]: With dead ends: 5997 [2022-01-18 17:21:58,558 INFO L226 Difference]: Without dead ends: 5892 [2022-01-18 17:21:58,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:21:58,558 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 267 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:21:58,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 260 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 914 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-01-18 17:21:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2022-01-18 17:21:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 3618. [2022-01-18 17:21:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 3.613491844069671) internal successors, (13070), 3617 states have internal predecessors, (13070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 13070 transitions. [2022-01-18 17:21:58,619 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 13070 transitions. Word has length 26 [2022-01-18 17:21:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:21:58,619 INFO L470 AbstractCegarLoop]: Abstraction has 3618 states and 13070 transitions. [2022-01-18 17:21:58,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:21:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 13070 transitions. [2022-01-18 17:21:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:21:58,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:21:58,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:21:58,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 17:21:58,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:58,839 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:21:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:21:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 44 times [2022-01-18 17:21:58,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:21:58,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55048816] [2022-01-18 17:21:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:21:58,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:21:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:21:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:21:58,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:21:58,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55048816] [2022-01-18 17:21:58,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55048816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:21:58,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901354871] [2022-01-18 17:21:58,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:21:58,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:21:58,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:21:58,977 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:21:58,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 17:21:58,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:21:58,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:21:58,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:21:59,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:21:59,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:21:59,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:21:59,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:22:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:00,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:00,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:00,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-01-18 17:22:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:03,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901354871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:22:03,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:22:03,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:22:03,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019741120] [2022-01-18 17:22:03,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:22:03,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:22:03,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:22:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:22:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:22:03,155 INFO L87 Difference]: Start difference. First operand 3618 states and 13070 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:22:04,441 INFO L93 Difference]: Finished difference Result 5423 states and 18644 transitions. [2022-01-18 17:22:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:22:04,442 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:22:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:22:04,450 INFO L225 Difference]: With dead ends: 5423 [2022-01-18 17:22:04,450 INFO L226 Difference]: Without dead ends: 5363 [2022-01-18 17:22:04,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=418, Invalid=1652, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:22:04,451 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 252 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:22:04,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 202 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 478 Invalid, 0 Unknown, 231 Unchecked, 0.2s Time] [2022-01-18 17:22:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2022-01-18 17:22:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 3672. [2022-01-18 17:22:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 3.6126396077363117) internal successors, (13262), 3671 states have internal predecessors, (13262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 13262 transitions. [2022-01-18 17:22:04,535 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 13262 transitions. Word has length 26 [2022-01-18 17:22:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:22:04,535 INFO L470 AbstractCegarLoop]: Abstraction has 3672 states and 13262 transitions. [2022-01-18 17:22:04,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 13262 transitions. [2022-01-18 17:22:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:22:04,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:22:04,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:22:04,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 17:22:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:04,754 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:22:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:22:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -861293324, now seen corresponding path program 45 times [2022-01-18 17:22:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:22:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056725875] [2022-01-18 17:22:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:22:04,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:22:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:05,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:22:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056725875] [2022-01-18 17:22:05,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056725875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:22:05,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471587673] [2022-01-18 17:22:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:22:05,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:22:05,044 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:22:05,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 17:22:05,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:22:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:22:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:22:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:22:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:22:05,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:05,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 90 [2022-01-18 17:22:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:06,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:06,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:06,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 165 [2022-01-18 17:22:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:11,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471587673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:22:11,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:22:11,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-18 17:22:11,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038211103] [2022-01-18 17:22:11,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:22:11,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:22:11,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:22:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:22:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:22:11,208 INFO L87 Difference]: Start difference. First operand 3672 states and 13262 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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) [2022-01-18 17:22:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:22:12,605 INFO L93 Difference]: Finished difference Result 5404 states and 18648 transitions. [2022-01-18 17:22:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:22:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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 26 [2022-01-18 17:22:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:22:12,614 INFO L225 Difference]: With dead ends: 5404 [2022-01-18 17:22:12,614 INFO L226 Difference]: Without dead ends: 5374 [2022-01-18 17:22:12,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:22:12,614 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:22:12,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 156 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 377 Invalid, 0 Unknown, 200 Unchecked, 0.2s Time] [2022-01-18 17:22:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2022-01-18 17:22:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 3679. [2022-01-18 17:22:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3679 states, 3678 states have (on average 3.613920609026645) internal successors, (13292), 3678 states have internal predecessors, (13292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3679 states to 3679 states and 13292 transitions. [2022-01-18 17:22:12,672 INFO L78 Accepts]: Start accepts. Automaton has 3679 states and 13292 transitions. Word has length 26 [2022-01-18 17:22:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:22:12,672 INFO L470 AbstractCegarLoop]: Abstraction has 3679 states and 13292 transitions. [2022-01-18 17:22:12,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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) [2022-01-18 17:22:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3679 states and 13292 transitions. [2022-01-18 17:22:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:22:12,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:22:12,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:22:12,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 17:22:12,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:12,885 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:22:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:22:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1450992676, now seen corresponding path program 46 times [2022-01-18 17:22:12,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:22:12,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680597595] [2022-01-18 17:22:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:22:12,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:22:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:13,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:22:13,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680597595] [2022-01-18 17:22:13,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680597595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:22:13,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698472089] [2022-01-18 17:22:13,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:22:13,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:13,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:22:13,048 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:22:13,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 17:22:13,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:22:13,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:22:13,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:22:13,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:22:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:22:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:22:13,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:22:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:13,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:13,834 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:22:13,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-01-18 17:22:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:15,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698472089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:22:15,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:22:15,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:22:15,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150916097] [2022-01-18 17:22:15,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:22:15,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:22:15,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:22:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:22:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:22:15,608 INFO L87 Difference]: Start difference. First operand 3679 states and 13292 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:22:18,268 INFO L93 Difference]: Finished difference Result 6247 states and 21380 transitions. [2022-01-18 17:22:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:22:18,268 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:22:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:22:18,278 INFO L225 Difference]: With dead ends: 6247 [2022-01-18 17:22:18,279 INFO L226 Difference]: Without dead ends: 6232 [2022-01-18 17:22:18,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=579, Invalid=3081, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:22:18,282 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 231 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:22:18,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 292 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1168 Invalid, 0 Unknown, 75 Unchecked, 0.6s Time] [2022-01-18 17:22:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2022-01-18 17:22:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 3670. [2022-01-18 17:22:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 3.612701008449169) internal successors, (13255), 3669 states have internal predecessors, (13255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 13255 transitions. [2022-01-18 17:22:18,345 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 13255 transitions. Word has length 26 [2022-01-18 17:22:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:22:18,345 INFO L470 AbstractCegarLoop]: Abstraction has 3670 states and 13255 transitions. [2022-01-18 17:22:18,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 13255 transitions. [2022-01-18 17:22:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:22:18,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:22:18,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:22:18,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 17:22:18,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-01-18 17:22:18,564 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:22:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:22:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 47 times [2022-01-18 17:22:18,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:22:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154426733] [2022-01-18 17:22:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:22:18,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:22:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:18,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:22:18,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154426733] [2022-01-18 17:22:18,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154426733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:22:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049164023] [2022-01-18 17:22:18,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:22:18,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:22:18,759 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:22:18,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 17:22:18,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:22:18,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:22:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:22:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:22:19,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:22:19,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:22:19,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:22:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:19,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:19,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:22:19,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:19,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 161 [2022-01-18 17:22:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049164023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:22:22,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:22:22,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:22:22,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811506590] [2022-01-18 17:22:22,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:22:22,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:22:22,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:22:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:22:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:22:22,702 INFO L87 Difference]: Start difference. First operand 3670 states and 13255 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:22:25,046 INFO L93 Difference]: Finished difference Result 6035 states and 20685 transitions. [2022-01-18 17:22:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:22:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:22:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:22:25,056 INFO L225 Difference]: With dead ends: 6035 [2022-01-18 17:22:25,056 INFO L226 Difference]: Without dead ends: 6005 [2022-01-18 17:22:25,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=593, Invalid=3567, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:22:25,057 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 252 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:22:25,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 369 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1093 Invalid, 0 Unknown, 474 Unchecked, 0.6s Time] [2022-01-18 17:22:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-01-18 17:22:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3702. [2022-01-18 17:22:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 3.6101053769251554) internal successors, (13361), 3701 states have internal predecessors, (13361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 13361 transitions. [2022-01-18 17:22:25,123 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 13361 transitions. Word has length 26 [2022-01-18 17:22:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:22:25,123 INFO L470 AbstractCegarLoop]: Abstraction has 3702 states and 13361 transitions. [2022-01-18 17:22:25,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 13361 transitions. [2022-01-18 17:22:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:22:25,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:22:25,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:22:25,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 17:22:25,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:25,342 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:22:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:22:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1082352392, now seen corresponding path program 48 times [2022-01-18 17:22:25,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:22:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204598533] [2022-01-18 17:22:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:22:25,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:22:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:25,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:22:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204598533] [2022-01-18 17:22:25,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204598533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:22:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691566712] [2022-01-18 17:22:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:22:25,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:25,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:22:25,588 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:22:25,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 17:22:25,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:22:25,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:22:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:22:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:22:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:22:26,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:26,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:22:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:26,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:27,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:27,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 161 [2022-01-18 17:22:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:42,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691566712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:22:42,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:22:42,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:22:42,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98344420] [2022-01-18 17:22:42,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:22:42,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:22:42,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:22:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:22:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:22:42,353 INFO L87 Difference]: Start difference. First operand 3702 states and 13361 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-01-18 17:22:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:22:44,308 INFO L93 Difference]: Finished difference Result 5491 states and 19106 transitions. [2022-01-18 17:22:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:22:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 26 [2022-01-18 17:22:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:22:44,319 INFO L225 Difference]: With dead ends: 5491 [2022-01-18 17:22:44,319 INFO L226 Difference]: Without dead ends: 5461 [2022-01-18 17:22:44,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:22:44,320 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 197 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:22:44,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 150 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 426 Invalid, 0 Unknown, 362 Unchecked, 0.2s Time] [2022-01-18 17:22:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2022-01-18 17:22:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3716. [2022-01-18 17:22:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 3.6134589502018843) internal successors, (13424), 3715 states have internal predecessors, (13424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 13424 transitions. [2022-01-18 17:22:44,397 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 13424 transitions. Word has length 26 [2022-01-18 17:22:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:22:44,397 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 13424 transitions. [2022-01-18 17:22:44,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-01-18 17:22:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 13424 transitions. [2022-01-18 17:22:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:22:44,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:22:44,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:22:44,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 17:22:44,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:44,619 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:22:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:22:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1165066902, now seen corresponding path program 49 times [2022-01-18 17:22:44,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:22:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805352117] [2022-01-18 17:22:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:22:44,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:22:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:44,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:22:44,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805352117] [2022-01-18 17:22:44,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805352117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:22:44,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667432873] [2022-01-18 17:22:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:22:44,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:44,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:22:44,829 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:22:44,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 17:22:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:22:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:22:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:22:45,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:45,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:22:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:45,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:45,894 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:22:45,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:22:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:48,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667432873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:22:48,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:22:48,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:22:48,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898972358] [2022-01-18 17:22:48,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:22:48,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:22:48,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:22:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:22:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:22:48,203 INFO L87 Difference]: Start difference. First operand 3716 states and 13424 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:22:48,830 INFO L93 Difference]: Finished difference Result 4995 states and 17213 transitions. [2022-01-18 17:22:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:22:48,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 26 [2022-01-18 17:22:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:22:48,840 INFO L225 Difference]: With dead ends: 4995 [2022-01-18 17:22:48,840 INFO L226 Difference]: Without dead ends: 4965 [2022-01-18 17:22:48,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:22:48,840 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 127 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:22:48,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 330 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 650 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-01-18 17:22:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-01-18 17:22:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3720. [2022-01-18 17:22:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 3719 states have (on average 3.611185802635117) internal successors, (13430), 3719 states have internal predecessors, (13430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 13430 transitions. [2022-01-18 17:22:48,902 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 13430 transitions. Word has length 26 [2022-01-18 17:22:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:22:48,902 INFO L470 AbstractCegarLoop]: Abstraction has 3720 states and 13430 transitions. [2022-01-18 17:22:48,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 13430 transitions. [2022-01-18 17:22:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:22:48,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:22:48,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:22:48,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 17:22:49,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:49,124 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:22:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:22:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 50 times [2022-01-18 17:22:49,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:22:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503978236] [2022-01-18 17:22:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:22:49,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:22:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:49,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:22:49,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503978236] [2022-01-18 17:22:49,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503978236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:22:49,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969279134] [2022-01-18 17:22:49,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:22:49,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:49,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:22:49,312 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:22:49,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 17:22:49,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:22:49,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:22:49,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:22:49,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:22:49,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:22:49,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:49,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:22:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:50,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:50,343 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:22:50,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-01-18 17:22:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:53,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969279134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:22:53,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:22:53,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:22:53,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154764436] [2022-01-18 17:22:53,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:22:53,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:22:53,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:22:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:22:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:22:53,795 INFO L87 Difference]: Start difference. First operand 3720 states and 13430 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:22:56,994 INFO L93 Difference]: Finished difference Result 6225 states and 21280 transitions. [2022-01-18 17:22:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:22:56,994 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:22:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:22:57,007 INFO L225 Difference]: With dead ends: 6225 [2022-01-18 17:22:57,007 INFO L226 Difference]: Without dead ends: 6185 [2022-01-18 17:22:57,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=615, Invalid=3167, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:22:57,008 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 248 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:22:57,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 295 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:22:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2022-01-18 17:22:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 3729. [2022-01-18 17:22:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.612392703862661) internal successors, (13467), 3728 states have internal predecessors, (13467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 13467 transitions. [2022-01-18 17:22:57,085 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 13467 transitions. Word has length 26 [2022-01-18 17:22:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:22:57,085 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 13467 transitions. [2022-01-18 17:22:57,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:22:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 13467 transitions. [2022-01-18 17:22:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:22:57,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:22:57,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:22:57,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 17:22:57,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:57,339 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:22:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:22:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 51 times [2022-01-18 17:22:57,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:22:57,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582134450] [2022-01-18 17:22:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:22:57,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:22:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:22:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:57,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:22:57,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582134450] [2022-01-18 17:22:57,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582134450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:22:57,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737332274] [2022-01-18 17:22:57,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:22:57,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:22:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:22:57,669 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:22:57,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 17:22:57,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:22:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:22:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:22:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:22:58,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:22:58,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:58,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:22:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:22:58,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:22:59,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:22:59,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 181 [2022-01-18 17:23:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:15,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737332274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:15,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:15,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:23:15,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067492029] [2022-01-18 17:23:15,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:15,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:23:15,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:23:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:23:15,921 INFO L87 Difference]: Start difference. First operand 3729 states and 13467 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 17:23:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:17,321 INFO L93 Difference]: Finished difference Result 5411 states and 18731 transitions. [2022-01-18 17:23:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:23:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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 26 [2022-01-18 17:23:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:17,332 INFO L225 Difference]: With dead ends: 5411 [2022-01-18 17:23:17,332 INFO L226 Difference]: Without dead ends: 5351 [2022-01-18 17:23:17,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:23:17,333 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:17,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 138 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 296 Invalid, 0 Unknown, 348 Unchecked, 0.3s Time] [2022-01-18 17:23:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2022-01-18 17:23:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3755. [2022-01-18 17:23:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 3.6164091635588704) internal successors, (13576), 3754 states have internal predecessors, (13576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 13576 transitions. [2022-01-18 17:23:17,413 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 13576 transitions. Word has length 26 [2022-01-18 17:23:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:17,414 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 13576 transitions. [2022-01-18 17:23:17,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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) [2022-01-18 17:23:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 13576 transitions. [2022-01-18 17:23:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:17,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:17,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:17,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 17:23:17,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 17:23:17,641 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash -370469074, now seen corresponding path program 52 times [2022-01-18 17:23:17,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:17,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682942638] [2022-01-18 17:23:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:17,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:17,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682942638] [2022-01-18 17:23:17,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682942638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620854112] [2022-01-18 17:23:17,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:23:17,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:17,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:17,981 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:17,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 17:23:18,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:23:18,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:23:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:23:18,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:23:18,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:23:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:18,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:19,122 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:23:19,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-01-18 17:23:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:22,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620854112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:22,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:22,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:23:22,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627852574] [2022-01-18 17:23:22,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:22,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:23:22,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:23:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:23:22,580 INFO L87 Difference]: Start difference. First operand 3755 states and 13576 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:25,306 INFO L93 Difference]: Finished difference Result 6364 states and 21737 transitions. [2022-01-18 17:23:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:23:25,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:23:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:25,338 INFO L225 Difference]: With dead ends: 6364 [2022-01-18 17:23:25,338 INFO L226 Difference]: Without dead ends: 6334 [2022-01-18 17:23:25,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=715, Invalid=3841, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:23:25,339 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 262 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:25,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 413 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:23:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2022-01-18 17:23:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 3755. [2022-01-18 17:23:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 3.6164091635588704) internal successors, (13576), 3754 states have internal predecessors, (13576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 13576 transitions. [2022-01-18 17:23:25,423 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 13576 transitions. Word has length 26 [2022-01-18 17:23:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:25,424 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 13576 transitions. [2022-01-18 17:23:25,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 13576 transitions. [2022-01-18 17:23:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:25,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:25,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:25,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 17:23:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-18 17:23:25,643 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 137082914, now seen corresponding path program 44 times [2022-01-18 17:23:25,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:25,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184881990] [2022-01-18 17:23:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:25,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:25,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:25,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184881990] [2022-01-18 17:23:25,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184881990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:25,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929155255] [2022-01-18 17:23:25,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:23:25,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:25,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:25,926 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:25,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 17:23:25,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:23:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:25,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:23:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:26,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:26,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:23:26,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:23:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:26,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:23:28,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:23:28,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 100 [2022-01-18 17:23:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:28,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929155255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:28,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:28,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-01-18 17:23:28,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695989918] [2022-01-18 17:23:28,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:23:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:23:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:23:28,479 INFO L87 Difference]: Start difference. First operand 3755 states and 13576 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:29,970 INFO L93 Difference]: Finished difference Result 5191 states and 18089 transitions. [2022-01-18 17:23:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:23:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:23:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:29,980 INFO L225 Difference]: With dead ends: 5191 [2022-01-18 17:23:29,980 INFO L226 Difference]: Without dead ends: 5161 [2022-01-18 17:23:29,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=534, Invalid=3498, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:23:29,981 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 198 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 853 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:29,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 392 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 497 Invalid, 0 Unknown, 853 Unchecked, 0.2s Time] [2022-01-18 17:23:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2022-01-18 17:23:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 3755. [2022-01-18 17:23:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 3.6164091635588704) internal successors, (13576), 3754 states have internal predecessors, (13576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 13576 transitions. [2022-01-18 17:23:30,036 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 13576 transitions. Word has length 26 [2022-01-18 17:23:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:30,037 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 13576 transitions. [2022-01-18 17:23:30,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 13576 transitions. [2022-01-18 17:23:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:30,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:30,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:30,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 17:23:30,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:30,257 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 45 times [2022-01-18 17:23:30,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:30,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235091221] [2022-01-18 17:23:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:30,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:30,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:30,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235091221] [2022-01-18 17:23:30,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235091221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:30,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175423364] [2022-01-18 17:23:30,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:23:30,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:30,400 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:30,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 17:23:30,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:23:30,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:30,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:23:30,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:23:30,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:30,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:30,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:23:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:31,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:31,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:31,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:31,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:23:31,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 147 [2022-01-18 17:23:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:31,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175423364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:31,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:31,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 17:23:31,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934186604] [2022-01-18 17:23:31,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:31,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:23:31,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:23:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:23:31,455 INFO L87 Difference]: Start difference. First operand 3755 states and 13576 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:33,593 INFO L93 Difference]: Finished difference Result 5472 states and 18529 transitions. [2022-01-18 17:23:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:23:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:23:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:33,631 INFO L225 Difference]: With dead ends: 5472 [2022-01-18 17:23:33,631 INFO L226 Difference]: Without dead ends: 5427 [2022-01-18 17:23:33,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=498, Invalid=2472, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:23:33,632 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 321 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 349 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:23:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5427 states. [2022-01-18 17:23:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5427 to 3881. [2022-01-18 17:23:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3881 states, 3880 states have (on average 3.622680412371134) internal successors, (14056), 3880 states have internal predecessors, (14056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 14056 transitions. [2022-01-18 17:23:33,704 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 14056 transitions. Word has length 26 [2022-01-18 17:23:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:33,704 INFO L470 AbstractCegarLoop]: Abstraction has 3881 states and 14056 transitions. [2022-01-18 17:23:33,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 14056 transitions. [2022-01-18 17:23:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:33,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:33,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:33,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 17:23:33,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:33,915 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1281630478, now seen corresponding path program 46 times [2022-01-18 17:23:33,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912972538] [2022-01-18 17:23:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:33,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:34,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912972538] [2022-01-18 17:23:34,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912972538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172253025] [2022-01-18 17:23:34,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:23:34,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:34,089 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:34,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 17:23:34,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:23:34,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:23:34,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:23:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:23:34,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:34,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:34,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:23:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:34,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:34,857 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:23:34,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 153 [2022-01-18 17:23:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:35,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172253025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:35,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:35,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 17:23:35,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153459718] [2022-01-18 17:23:35,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:35,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:23:35,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:35,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:23:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:23:35,279 INFO L87 Difference]: Start difference. First operand 3881 states and 14056 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:36,766 INFO L93 Difference]: Finished difference Result 5688 states and 19636 transitions. [2022-01-18 17:23:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:23:36,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:23:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:36,788 INFO L225 Difference]: With dead ends: 5688 [2022-01-18 17:23:36,789 INFO L226 Difference]: Without dead ends: 5637 [2022-01-18 17:23:36,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:23:36,789 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 223 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:36,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 354 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:23:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2022-01-18 17:23:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 3903. [2022-01-18 17:23:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 3.620451050743209) internal successors, (14127), 3902 states have internal predecessors, (14127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 14127 transitions. [2022-01-18 17:23:36,871 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 14127 transitions. Word has length 26 [2022-01-18 17:23:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:36,871 INFO L470 AbstractCegarLoop]: Abstraction has 3903 states and 14127 transitions. [2022-01-18 17:23:36,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 14127 transitions. [2022-01-18 17:23:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:36,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:36,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:36,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 17:23:37,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 17:23:37,094 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 47 times [2022-01-18 17:23:37,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:37,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984915146] [2022-01-18 17:23:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:37,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:37,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:37,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984915146] [2022-01-18 17:23:37,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984915146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:37,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634703271] [2022-01-18 17:23:37,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:23:37,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:37,264 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:37,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 17:23:37,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:23:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:23:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:37,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:23:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:37,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:37,974 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:23:37,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-01-18 17:23:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:38,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634703271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:38,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:38,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 17:23:38,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234699184] [2022-01-18 17:23:38,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:38,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:23:38,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:23:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:23:38,607 INFO L87 Difference]: Start difference. First operand 3903 states and 14127 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:40,547 INFO L93 Difference]: Finished difference Result 5328 states and 18706 transitions. [2022-01-18 17:23:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:23:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:23:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:40,556 INFO L225 Difference]: With dead ends: 5328 [2022-01-18 17:23:40,557 INFO L226 Difference]: Without dead ends: 5256 [2022-01-18 17:23:40,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 17:23:40,557 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 191 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:40,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 277 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:23:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2022-01-18 17:23:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 3909. [2022-01-18 17:23:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 3.617195496417605) internal successors, (14136), 3908 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 14136 transitions. [2022-01-18 17:23:40,613 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 14136 transitions. Word has length 26 [2022-01-18 17:23:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:40,613 INFO L470 AbstractCegarLoop]: Abstraction has 3909 states and 14136 transitions. [2022-01-18 17:23:40,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 14136 transitions. [2022-01-18 17:23:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:40,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:40,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:40,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 17:23:40,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:40,833 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:40,833 INFO L85 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 48 times [2022-01-18 17:23:40,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:40,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316345090] [2022-01-18 17:23:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:40,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:41,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316345090] [2022-01-18 17:23:41,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316345090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391010297] [2022-01-18 17:23:41,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:23:41,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:41,077 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:41,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 17:23:41,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:23:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:23:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:41,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:23:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:41,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:41,822 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:23:41,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:23:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:42,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391010297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:42,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:42,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:23:42,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119900102] [2022-01-18 17:23:42,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:42,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:23:42,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:23:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:23:42,322 INFO L87 Difference]: Start difference. First operand 3909 states and 14136 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:43,508 INFO L93 Difference]: Finished difference Result 5366 states and 18827 transitions. [2022-01-18 17:23:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:23:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:23:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:43,519 INFO L225 Difference]: With dead ends: 5366 [2022-01-18 17:23:43,519 INFO L226 Difference]: Without dead ends: 5336 [2022-01-18 17:23:43,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:23:43,519 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:43,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 291 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:23:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2022-01-18 17:23:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 3929. [2022-01-18 17:23:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 3.6176171079429733) internal successors, (14210), 3928 states have internal predecessors, (14210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 14210 transitions. [2022-01-18 17:23:43,632 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 14210 transitions. Word has length 26 [2022-01-18 17:23:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:43,632 INFO L470 AbstractCegarLoop]: Abstraction has 3929 states and 14210 transitions. [2022-01-18 17:23:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 14210 transitions. [2022-01-18 17:23:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:43,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:43,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:43,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 17:23:43,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 17:23:43,842 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 53 times [2022-01-18 17:23:43,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:43,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054450764] [2022-01-18 17:23:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:43,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:44,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:44,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054450764] [2022-01-18 17:23:44,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054450764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:44,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295551031] [2022-01-18 17:23:44,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:23:44,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:44,031 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:44,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 17:23:44,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:23:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:23:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:23:44,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:44,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:23:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:44,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:44,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:23:44,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:23:44,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 169 [2022-01-18 17:23:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:46,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295551031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:46,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:46,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:23:46,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540533114] [2022-01-18 17:23:46,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:46,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:23:46,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:46,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:23:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:23:46,753 INFO L87 Difference]: Start difference. First operand 3929 states and 14210 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:23:52,766 INFO L93 Difference]: Finished difference Result 10557 states and 35777 transitions. [2022-01-18 17:23:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 17:23:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:23:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:23:52,788 INFO L225 Difference]: With dead ends: 10557 [2022-01-18 17:23:52,788 INFO L226 Difference]: Without dead ends: 10497 [2022-01-18 17:23:52,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:23:52,789 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 442 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:23:52,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 422 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 974 Invalid, 0 Unknown, 700 Unchecked, 0.7s Time] [2022-01-18 17:23:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10497 states. [2022-01-18 17:23:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10497 to 3981. [2022-01-18 17:23:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 3.6329145728643217) internal successors, (14459), 3980 states have internal predecessors, (14459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 14459 transitions. [2022-01-18 17:23:52,894 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 14459 transitions. Word has length 26 [2022-01-18 17:23:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:23:52,894 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 14459 transitions. [2022-01-18 17:23:52,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:23:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 14459 transitions. [2022-01-18 17:23:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:23:52,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:23:52,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:23:52,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 17:23:53,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 17:23:53,101 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:23:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:23:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2100650886, now seen corresponding path program 54 times [2022-01-18 17:23:53,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:23:53,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124626552] [2022-01-18 17:23:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:23:53,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:23:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:23:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:53,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:23:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124626552] [2022-01-18 17:23:53,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124626552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:23:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699884191] [2022-01-18 17:23:53,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:23:53,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:23:53,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:23:53,333 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:23:53,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 17:23:53,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:23:53,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:23:53,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:23:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:23:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:23:53,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:23:53,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:23:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:53,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:23:54,430 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:23:54,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:23:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:23:57,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699884191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:23:57,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:23:57,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:23:57,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773896793] [2022-01-18 17:23:57,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:23:57,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:23:57,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:23:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:23:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:23:57,584 INFO L87 Difference]: Start difference. First operand 3981 states and 14459 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:24:04,215 INFO L93 Difference]: Finished difference Result 7676 states and 25599 transitions. [2022-01-18 17:24:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 17:24:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:24:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:24:04,228 INFO L225 Difference]: With dead ends: 7676 [2022-01-18 17:24:04,228 INFO L226 Difference]: Without dead ends: 7631 [2022-01-18 17:24:04,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1197, Invalid=6635, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 17:24:04,229 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 473 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:24:04,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 510 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 17:24:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2022-01-18 17:24:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 4044. [2022-01-18 17:24:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4043 states have (on average 3.6275043284689588) internal successors, (14666), 4043 states have internal predecessors, (14666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 14666 transitions. [2022-01-18 17:24:04,306 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 14666 transitions. Word has length 26 [2022-01-18 17:24:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:24:04,306 INFO L470 AbstractCegarLoop]: Abstraction has 4044 states and 14666 transitions. [2022-01-18 17:24:04,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 14666 transitions. [2022-01-18 17:24:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:24:04,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:24:04,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:24:04,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 17:24:04,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-01-18 17:24:04,527 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:24:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:24:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash -161931026, now seen corresponding path program 49 times [2022-01-18 17:24:04,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:24:04,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376221992] [2022-01-18 17:24:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:24:04,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:24:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:24:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:04,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:24:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376221992] [2022-01-18 17:24:04,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376221992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:24:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807939291] [2022-01-18 17:24:04,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:24:04,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:04,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:24:04,752 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:24:04,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 17:24:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:24:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:24:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:24:05,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:24:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:05,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:24:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:05,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:24:05,800 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:24:05,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:24:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:06,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807939291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:24:06,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:24:06,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:24:06,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031438106] [2022-01-18 17:24:06,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:24:06,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:24:06,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:24:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:24:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:24:06,343 INFO L87 Difference]: Start difference. First operand 4044 states and 14666 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:24:11,138 INFO L93 Difference]: Finished difference Result 7727 states and 25963 transitions. [2022-01-18 17:24:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 17:24:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:24:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:24:11,152 INFO L225 Difference]: With dead ends: 7727 [2022-01-18 17:24:11,152 INFO L226 Difference]: Without dead ends: 7676 [2022-01-18 17:24:11,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3757 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1803, Invalid=8499, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 17:24:11,153 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 468 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:24:11,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 521 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:24:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2022-01-18 17:24:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 4078. [2022-01-18 17:24:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 3.631346578366446) internal successors, (14805), 4077 states have internal predecessors, (14805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 14805 transitions. [2022-01-18 17:24:11,235 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 14805 transitions. Word has length 26 [2022-01-18 17:24:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:24:11,235 INFO L470 AbstractCegarLoop]: Abstraction has 4078 states and 14805 transitions. [2022-01-18 17:24:11,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 14805 transitions. [2022-01-18 17:24:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:24:11,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:24:11,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:24:11,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 17:24:11,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:11,454 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:24:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:24:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1385352244, now seen corresponding path program 50 times [2022-01-18 17:24:11,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:24:11,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758295127] [2022-01-18 17:24:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:24:11,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:24:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:24:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:11,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:24:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758295127] [2022-01-18 17:24:11,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758295127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:24:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062227921] [2022-01-18 17:24:11,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:24:11,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:11,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:24:11,580 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:24:11,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 17:24:11,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:24:11,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:24:11,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:24:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:24:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:24:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:24:11,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:24:11,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-01-18 17:24:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:12,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:24:12,974 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:24:12,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:24:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:13,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062227921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:24:13,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:24:13,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:24:13,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081327905] [2022-01-18 17:24:13,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:24:13,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:24:13,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:24:13,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:24:13,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:24:13,415 INFO L87 Difference]: Start difference. First operand 4078 states and 14805 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:24:23,792 INFO L93 Difference]: Finished difference Result 8968 states and 29878 transitions. [2022-01-18 17:24:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 17:24:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:24:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:24:23,808 INFO L225 Difference]: With dead ends: 8968 [2022-01-18 17:24:23,808 INFO L226 Difference]: Without dead ends: 8927 [2022-01-18 17:24:23,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8195 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3393, Invalid=17199, Unknown=0, NotChecked=0, Total=20592 [2022-01-18 17:24:23,810 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 546 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:24:23,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 738 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 17:24:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2022-01-18 17:24:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 4172. [2022-01-18 17:24:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 4171 states have (on average 3.634859745864301) internal successors, (15161), 4171 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 15161 transitions. [2022-01-18 17:24:23,904 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 15161 transitions. Word has length 26 [2022-01-18 17:24:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:24:23,904 INFO L470 AbstractCegarLoop]: Abstraction has 4172 states and 15161 transitions. [2022-01-18 17:24:23,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 15161 transitions. [2022-01-18 17:24:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:24:23,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:24:23,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:24:23,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 17:24:24,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:24,139 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:24:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:24:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 55 times [2022-01-18 17:24:24,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:24:24,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475078686] [2022-01-18 17:24:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:24:24,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:24:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:24:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:24,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:24:24,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475078686] [2022-01-18 17:24:24,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475078686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:24:24,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039967527] [2022-01-18 17:24:24,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:24:24,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:24,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:24:24,454 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:24:24,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 17:24:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:24:24,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:24:24,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:24:25,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:24:25,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:25,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:24:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:25,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:24:25,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:25,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:24:25,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 181 [2022-01-18 17:24:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:27,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039967527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:24:27,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:24:27,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:24:27,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158876323] [2022-01-18 17:24:27,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:24:27,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:24:27,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:24:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:24:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:24:27,333 INFO L87 Difference]: Start difference. First operand 4172 states and 15161 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:24:31,227 INFO L93 Difference]: Finished difference Result 7082 states and 24041 transitions. [2022-01-18 17:24:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:24:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:24:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:24:31,240 INFO L225 Difference]: With dead ends: 7082 [2022-01-18 17:24:31,240 INFO L226 Difference]: Without dead ends: 7040 [2022-01-18 17:24:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=846, Invalid=3984, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:24:31,241 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 313 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:24:31,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 414 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1333 Invalid, 0 Unknown, 437 Unchecked, 0.8s Time] [2022-01-18 17:24:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2022-01-18 17:24:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 4245. [2022-01-18 17:24:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 3.632893496701225) internal successors, (15418), 4244 states have internal predecessors, (15418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 15418 transitions. [2022-01-18 17:24:31,313 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 15418 transitions. Word has length 26 [2022-01-18 17:24:31,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:24:31,313 INFO L470 AbstractCegarLoop]: Abstraction has 4245 states and 15418 transitions. [2022-01-18 17:24:31,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:31,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 15418 transitions. [2022-01-18 17:24:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:24:31,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:24:31,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:24:31,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 17:24:31,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 17:24:31,532 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:24:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:24:31,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1152382328, now seen corresponding path program 56 times [2022-01-18 17:24:31,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:24:31,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682701623] [2022-01-18 17:24:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:24:31,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:24:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:24:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:31,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:24:31,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682701623] [2022-01-18 17:24:31,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682701623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:24:31,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642733763] [2022-01-18 17:24:31,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:24:31,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:31,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:24:31,829 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:24:31,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 17:24:31,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:24:31,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:24:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:24:31,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:24:32,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:24:32,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:24:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:33,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:24:33,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:33,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:33,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:24:33,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-01-18 17:24:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:34,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642733763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:24:34,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:24:34,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 17:24:34,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274231207] [2022-01-18 17:24:34,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:24:34,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:24:34,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:24:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:24:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:24:34,165 INFO L87 Difference]: Start difference. First operand 4245 states and 15418 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:24:43,146 INFO L93 Difference]: Finished difference Result 11429 states and 39888 transitions. [2022-01-18 17:24:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 17:24:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:24:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:24:43,167 INFO L225 Difference]: With dead ends: 11429 [2022-01-18 17:24:43,167 INFO L226 Difference]: Without dead ends: 11399 [2022-01-18 17:24:43,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1881, Invalid=11229, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 17:24:43,168 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 718 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 2543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1007 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:24:43,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 540 Invalid, 2543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1400 Invalid, 0 Unknown, 1007 Unchecked, 0.9s Time] [2022-01-18 17:24:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2022-01-18 17:24:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 4254. [2022-01-18 17:24:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 3.6355513754996474) internal successors, (15462), 4253 states have internal predecessors, (15462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 15462 transitions. [2022-01-18 17:24:43,277 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 15462 transitions. Word has length 26 [2022-01-18 17:24:43,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:24:43,277 INFO L470 AbstractCegarLoop]: Abstraction has 4254 states and 15462 transitions. [2022-01-18 17:24:43,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:24:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 15462 transitions. [2022-01-18 17:24:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:24:43,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:24:43,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:24:43,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 17:24:43,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:43,498 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:24:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:24:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash 895165674, now seen corresponding path program 57 times [2022-01-18 17:24:43,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:24:43,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698542808] [2022-01-18 17:24:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:24:43,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:24:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:24:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:43,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:24:43,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698542808] [2022-01-18 17:24:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698542808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:24:43,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717524838] [2022-01-18 17:24:43,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:24:43,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:24:43,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:24:43,801 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:24:43,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 17:24:43,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:24:43,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:24:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:24:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:24:44,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:24:44,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 95 [2022-01-18 17:24:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:44,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:24:45,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:45,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:24:45,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:24:45,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-01-18 17:24:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:24:45,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717524838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:24:45,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:24:45,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-18 17:24:45,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174407880] [2022-01-18 17:24:45,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:24:45,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:24:45,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:24:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:24:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:24:45,866 INFO L87 Difference]: Start difference. First operand 4254 states and 15462 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:25:09,639 INFO L93 Difference]: Finished difference Result 9965 states and 33067 transitions. [2022-01-18 17:25:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-18 17:25:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:25:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:25:09,682 INFO L225 Difference]: With dead ends: 9965 [2022-01-18 17:25:09,682 INFO L226 Difference]: Without dead ends: 9929 [2022-01-18 17:25:09,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12686 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=4733, Invalid=28939, Unknown=0, NotChecked=0, Total=33672 [2022-01-18 17:25:09,683 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 698 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 4955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:25:09,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1422 Invalid, 4955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 4802 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-18 17:25:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2022-01-18 17:25:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 4264. [2022-01-18 17:25:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 3.6396903589021816) internal successors, (15516), 4263 states have internal predecessors, (15516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 15516 transitions. [2022-01-18 17:25:09,794 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 15516 transitions. Word has length 26 [2022-01-18 17:25:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:25:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 4264 states and 15516 transitions. [2022-01-18 17:25:09,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 15516 transitions. [2022-01-18 17:25:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:25:09,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:25:09,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:25:09,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 17:25:10,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:10,017 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:25:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:25:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 58 times [2022-01-18 17:25:10,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:25:10,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639024292] [2022-01-18 17:25:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:25:10,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:25:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:10,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:25:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639024292] [2022-01-18 17:25:10,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639024292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:25:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692531177] [2022-01-18 17:25:10,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:25:10,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:10,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:25:10,281 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:25:10,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 17:25:10,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:25:10,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:25:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:25:10,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:25:10,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:10,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:10,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 17:25:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:11,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:25:11,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:11,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 185 [2022-01-18 17:25:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:18,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692531177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:25:18,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:25:18,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:25:18,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464138250] [2022-01-18 17:25:18,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:25:18,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:25:18,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:25:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:25:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:25:18,059 INFO L87 Difference]: Start difference. First operand 4264 states and 15516 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:25:24,014 INFO L93 Difference]: Finished difference Result 8009 states and 26372 transitions. [2022-01-18 17:25:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 17:25:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:25:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:25:24,029 INFO L225 Difference]: With dead ends: 8009 [2022-01-18 17:25:24,029 INFO L226 Difference]: Without dead ends: 7897 [2022-01-18 17:25:24,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3672 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1582, Invalid=7924, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 17:25:24,030 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 422 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 912 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:25:24,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 504 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1226 Invalid, 0 Unknown, 912 Unchecked, 0.8s Time] [2022-01-18 17:25:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7897 states. [2022-01-18 17:25:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7897 to 4271. [2022-01-18 17:25:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.643559718969555) internal successors, (15558), 4270 states have internal predecessors, (15558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 15558 transitions. [2022-01-18 17:25:24,114 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 15558 transitions. Word has length 26 [2022-01-18 17:25:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:25:24,114 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 15558 transitions. [2022-01-18 17:25:24,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 15558 transitions. [2022-01-18 17:25:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:25:24,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:25:24,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:25:24,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 17:25:24,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:24,336 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:25:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:25:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 51 times [2022-01-18 17:25:24,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:25:24,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293646372] [2022-01-18 17:25:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:25:24,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:25:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:24,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:25:24,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293646372] [2022-01-18 17:25:24,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293646372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:25:24,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384147734] [2022-01-18 17:25:24,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:25:24,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:25:24,531 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:25:24,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 17:25:24,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:25:24,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:25:24,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:25:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:25:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:25,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:25,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:25:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:25,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:25:25,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:25,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:25,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:25,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:25,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-01-18 17:25:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:25,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384147734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:25:25,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:25:25,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 17:25:25,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549559315] [2022-01-18 17:25:25,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:25:25,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:25:25,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:25:25,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:25:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:25:25,756 INFO L87 Difference]: Start difference. First operand 4271 states and 15558 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:25:28,182 INFO L93 Difference]: Finished difference Result 6178 states and 21380 transitions. [2022-01-18 17:25:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:25:28,183 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:25:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:25:28,194 INFO L225 Difference]: With dead ends: 6178 [2022-01-18 17:25:28,194 INFO L226 Difference]: Without dead ends: 6134 [2022-01-18 17:25:28,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=776, Invalid=3780, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:25:28,194 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 353 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:25:28,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 418 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:25:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2022-01-18 17:25:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 4358. [2022-01-18 17:25:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 4357 states have (on average 3.640578379619004) internal successors, (15862), 4357 states have internal predecessors, (15862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 15862 transitions. [2022-01-18 17:25:28,268 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 15862 transitions. Word has length 26 [2022-01-18 17:25:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:25:28,268 INFO L470 AbstractCegarLoop]: Abstraction has 4358 states and 15862 transitions. [2022-01-18 17:25:28,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 15862 transitions. [2022-01-18 17:25:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:25:28,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:25:28,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:25:28,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 17:25:28,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 17:25:28,479 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:25:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:25:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 899538176, now seen corresponding path program 52 times [2022-01-18 17:25:28,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:25:28,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230119952] [2022-01-18 17:25:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:25:28,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:25:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:28,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:25:28,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230119952] [2022-01-18 17:25:28,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230119952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:25:28,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298391441] [2022-01-18 17:25:28,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:25:28,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:25:28,639 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:25:28,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 17:25:28,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:25:28,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:25:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:25:28,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:25:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:28,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:28,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:28,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 17:25:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:29,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:25:29,434 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:25:29,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:25:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:29,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298391441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:25:29,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:25:29,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 17:25:29,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386278073] [2022-01-18 17:25:29,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:25:29,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:25:29,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:25:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:25:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:25:29,905 INFO L87 Difference]: Start difference. First operand 4358 states and 15862 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:25:36,658 INFO L93 Difference]: Finished difference Result 7652 states and 26237 transitions. [2022-01-18 17:25:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 17:25:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:25:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:25:36,672 INFO L225 Difference]: With dead ends: 7652 [2022-01-18 17:25:36,672 INFO L226 Difference]: Without dead ends: 7604 [2022-01-18 17:25:36,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5068 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2232, Invalid=11340, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 17:25:36,673 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 403 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:25:36,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 499 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:25:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7604 states. [2022-01-18 17:25:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7604 to 4393. [2022-01-18 17:25:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4392 states have (on average 3.631375227686703) internal successors, (15949), 4392 states have internal predecessors, (15949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 15949 transitions. [2022-01-18 17:25:36,760 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 15949 transitions. Word has length 26 [2022-01-18 17:25:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:25:36,760 INFO L470 AbstractCegarLoop]: Abstraction has 4393 states and 15949 transitions. [2022-01-18 17:25:36,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 15949 transitions. [2022-01-18 17:25:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:25:36,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:25:36,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:25:36,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 17:25:36,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 17:25:36,981 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:25:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:25:36,981 INFO L85 PathProgramCache]: Analyzing trace with hash 980937232, now seen corresponding path program 53 times [2022-01-18 17:25:36,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:25:36,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313982981] [2022-01-18 17:25:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:25:36,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:25:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:37,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:25:37,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313982981] [2022-01-18 17:25:37,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313982981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:25:37,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630388365] [2022-01-18 17:25:37,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:25:37,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:25:37,155 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:25:37,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 17:25:37,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:25:37,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:25:37,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:25:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:25:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:37,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:37,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:37,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-01-18 17:25:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:37,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:25:38,118 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:25:38,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 149 [2022-01-18 17:25:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:38,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630388365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:25:38,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:25:38,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:25:38,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741771852] [2022-01-18 17:25:38,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:25:38,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:25:38,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:25:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:25:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:25:38,567 INFO L87 Difference]: Start difference. First operand 4393 states and 15949 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:25:43,759 INFO L93 Difference]: Finished difference Result 7518 states and 25500 transitions. [2022-01-18 17:25:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:25:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:25:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:25:43,774 INFO L225 Difference]: With dead ends: 7518 [2022-01-18 17:25:43,774 INFO L226 Difference]: Without dead ends: 7389 [2022-01-18 17:25:43,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3837 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1813, Invalid=8693, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 17:25:43,776 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 381 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:25:43,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 563 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1837 Invalid, 0 Unknown, 171 Unchecked, 0.8s Time] [2022-01-18 17:25:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-01-18 17:25:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 4425. [2022-01-18 17:25:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4424 states have (on average 3.625) internal successors, (16037), 4424 states have internal predecessors, (16037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 16037 transitions. [2022-01-18 17:25:43,899 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 16037 transitions. Word has length 26 [2022-01-18 17:25:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:25:43,899 INFO L470 AbstractCegarLoop]: Abstraction has 4425 states and 16037 transitions. [2022-01-18 17:25:43,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 16037 transitions. [2022-01-18 17:25:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:25:43,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:25:43,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:25:43,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 17:25:44,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 17:25:44,121 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:25:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:25:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash 186452920, now seen corresponding path program 59 times [2022-01-18 17:25:44,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:25:44,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297684698] [2022-01-18 17:25:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:25:44,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:25:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:44,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:25:44,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297684698] [2022-01-18 17:25:44,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297684698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:25:44,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376323226] [2022-01-18 17:25:44,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:25:44,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:44,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:25:44,329 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:25:44,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 17:25:44,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:25:44,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:25:44,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:25:44,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:25:44,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:44,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:44,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:25:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:45,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:25:45,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:45,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:45,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 181 [2022-01-18 17:25:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:47,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376323226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:25:47,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:25:47,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:25:47,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679407867] [2022-01-18 17:25:47,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:25:47,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:25:47,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:25:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:25:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:25:47,900 INFO L87 Difference]: Start difference. First operand 4425 states and 16037 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:25:48,610 INFO L93 Difference]: Finished difference Result 6836 states and 23626 transitions. [2022-01-18 17:25:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:25:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:25:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:25:48,621 INFO L225 Difference]: With dead ends: 6836 [2022-01-18 17:25:48,622 INFO L226 Difference]: Without dead ends: 6776 [2022-01-18 17:25:48,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:25:48,622 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 128 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:25:48,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 289 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 476 Invalid, 0 Unknown, 260 Unchecked, 0.2s Time] [2022-01-18 17:25:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2022-01-18 17:25:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 4439. [2022-01-18 17:25:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4439 states, 4438 states have (on average 3.626858945470933) internal successors, (16096), 4438 states have internal predecessors, (16096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4439 states to 4439 states and 16096 transitions. [2022-01-18 17:25:48,702 INFO L78 Accepts]: Start accepts. Automaton has 4439 states and 16096 transitions. Word has length 26 [2022-01-18 17:25:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:25:48,702 INFO L470 AbstractCegarLoop]: Abstraction has 4439 states and 16096 transitions. [2022-01-18 17:25:48,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4439 states and 16096 transitions. [2022-01-18 17:25:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:25:48,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:25:48,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:25:48,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 17:25:48,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 17:25:48,910 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:25:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:25:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1307454802, now seen corresponding path program 60 times [2022-01-18 17:25:48,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:25:48,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542923084] [2022-01-18 17:25:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:25:48,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:25:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:49,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:25:49,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542923084] [2022-01-18 17:25:49,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542923084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:25:49,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498571270] [2022-01-18 17:25:49,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:25:49,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:25:49,153 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:25:49,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 17:25:49,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:25:49,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:25:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:25:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:25:49,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:49,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:49,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:25:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:50,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:25:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:50,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:50,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 149 [2022-01-18 17:25:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498571270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:25:51,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:25:51,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 17:25:51,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959081445] [2022-01-18 17:25:51,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:25:51,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:25:51,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:25:51,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:25:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:25:51,028 INFO L87 Difference]: Start difference. First operand 4439 states and 16096 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:25:55,485 INFO L93 Difference]: Finished difference Result 9226 states and 31903 transitions. [2022-01-18 17:25:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 17:25:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:25:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:25:55,501 INFO L225 Difference]: With dead ends: 9226 [2022-01-18 17:25:55,501 INFO L226 Difference]: Without dead ends: 9196 [2022-01-18 17:25:55,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1277, Invalid=11155, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 17:25:55,503 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 352 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:25:55,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 617 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1350 Invalid, 0 Unknown, 571 Unchecked, 0.6s Time] [2022-01-18 17:25:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2022-01-18 17:25:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 4452. [2022-01-18 17:25:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 4451 states have (on average 3.630644798921591) internal successors, (16160), 4451 states have internal predecessors, (16160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 16160 transitions. [2022-01-18 17:25:55,599 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 16160 transitions. Word has length 26 [2022-01-18 17:25:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:25:55,599 INFO L470 AbstractCegarLoop]: Abstraction has 4452 states and 16160 transitions. [2022-01-18 17:25:55,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:25:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 16160 transitions. [2022-01-18 17:25:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:25:55,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:25:55,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:25:55,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 17:25:55,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:55,819 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:25:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:25:55,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1431079860, now seen corresponding path program 61 times [2022-01-18 17:25:55,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:25:55,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345436589] [2022-01-18 17:25:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:25:55,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:25:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:56,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:25:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345436589] [2022-01-18 17:25:56,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345436589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:25:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807894643] [2022-01-18 17:25:56,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:25:56,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:25:56,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:25:56,015 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:25:56,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 17:25:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:25:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:25:56,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:25:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:25:56,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:56,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:25:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:56,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:25:57,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:25:57,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:25:57,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:25:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:25:59,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807894643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:25:59,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:25:59,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:25:59,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950776512] [2022-01-18 17:25:59,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:25:59,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:25:59,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:25:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:25:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:25:59,286 INFO L87 Difference]: Start difference. First operand 4452 states and 16160 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:02,666 INFO L93 Difference]: Finished difference Result 7514 states and 25642 transitions. [2022-01-18 17:26:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:26:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:26:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:02,680 INFO L225 Difference]: With dead ends: 7514 [2022-01-18 17:26:02,680 INFO L226 Difference]: Without dead ends: 7484 [2022-01-18 17:26:02,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=683, Invalid=3223, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:26:02,681 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 357 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:02,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 438 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1267 Invalid, 0 Unknown, 483 Unchecked, 0.7s Time] [2022-01-18 17:26:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-01-18 17:26:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 4463. [2022-01-18 17:26:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.630434782608696) internal successors, (16199), 4462 states have internal predecessors, (16199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 16199 transitions. [2022-01-18 17:26:02,765 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 16199 transitions. Word has length 26 [2022-01-18 17:26:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:02,765 INFO L470 AbstractCegarLoop]: Abstraction has 4463 states and 16199 transitions. [2022-01-18 17:26:02,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 16199 transitions. [2022-01-18 17:26:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:26:02,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:02,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:02,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 17:26:02,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:02,983 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:02,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1173944532, now seen corresponding path program 62 times [2022-01-18 17:26:02,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:02,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029577668] [2022-01-18 17:26:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:02,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:03,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029577668] [2022-01-18 17:26:03,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029577668] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31042229] [2022-01-18 17:26:03,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:26:03,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:03,236 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:03,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 17:26:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:26:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:26:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:26:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:03,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:26:03,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:03,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:26:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:03,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:04,308 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:26:04,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 157 [2022-01-18 17:26:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:05,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31042229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:05,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:05,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:26:05,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123272470] [2022-01-18 17:26:05,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:05,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:26:05,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:26:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:26:05,968 INFO L87 Difference]: Start difference. First operand 4463 states and 16199 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:11,028 INFO L93 Difference]: Finished difference Result 8053 states and 27252 transitions. [2022-01-18 17:26:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:26:11,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:26:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:11,042 INFO L225 Difference]: With dead ends: 8053 [2022-01-18 17:26:11,042 INFO L226 Difference]: Without dead ends: 7973 [2022-01-18 17:26:11,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=759, Invalid=4211, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:26:11,042 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 332 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:11,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 415 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:26:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2022-01-18 17:26:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 4488. [2022-01-18 17:26:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 3.6244706931134387) internal successors, (16263), 4487 states have internal predecessors, (16263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 16263 transitions. [2022-01-18 17:26:11,125 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 16263 transitions. Word has length 26 [2022-01-18 17:26:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:11,125 INFO L470 AbstractCegarLoop]: Abstraction has 4488 states and 16263 transitions. [2022-01-18 17:26:11,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 16263 transitions. [2022-01-18 17:26:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:26:11,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:11,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:11,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 17:26:11,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-01-18 17:26:11,346 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash -72776118, now seen corresponding path program 63 times [2022-01-18 17:26:11,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342475627] [2022-01-18 17:26:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:11,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:11,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342475627] [2022-01-18 17:26:11,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342475627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983985306] [2022-01-18 17:26:11,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:26:11,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:11,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:11,619 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:11,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 17:26:11,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:26:11,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:26:11,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:26:11,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:12,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:26:12,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:12,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:26:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:12,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:12,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:12,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:12,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-18 17:26:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:15,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983985306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:15,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:15,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:26:15,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666450093] [2022-01-18 17:26:15,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:15,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:26:15,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:26:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:26:15,929 INFO L87 Difference]: Start difference. First operand 4488 states and 16263 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:17,852 INFO L93 Difference]: Finished difference Result 5858 states and 20217 transitions. [2022-01-18 17:26:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:26:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:26:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:17,862 INFO L225 Difference]: With dead ends: 5858 [2022-01-18 17:26:17,862 INFO L226 Difference]: Without dead ends: 5828 [2022-01-18 17:26:17,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 17:26:17,863 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 267 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:17,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 362 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1000 Invalid, 0 Unknown, 457 Unchecked, 0.5s Time] [2022-01-18 17:26:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2022-01-18 17:26:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4483. [2022-01-18 17:26:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4482 states have (on average 3.6229361892012495) internal successors, (16238), 4482 states have internal predecessors, (16238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 16238 transitions. [2022-01-18 17:26:17,933 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 16238 transitions. Word has length 26 [2022-01-18 17:26:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:17,933 INFO L470 AbstractCegarLoop]: Abstraction has 4483 states and 16238 transitions. [2022-01-18 17:26:17,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 16238 transitions. [2022-01-18 17:26:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:26:17,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:17,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:17,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 17:26:18,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:18,155 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash -636482032, now seen corresponding path program 64 times [2022-01-18 17:26:18,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:18,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723667175] [2022-01-18 17:26:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:18,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:18,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:18,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723667175] [2022-01-18 17:26:18,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723667175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:18,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767974175] [2022-01-18 17:26:18,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:26:18,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:18,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:18,334 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:18,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 17:26:18,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:26:18,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:26:18,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:26:18,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:18,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:26:18,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:18,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:26:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:18,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:19,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:19,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:19,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 211 treesize of output 169 [2022-01-18 17:26:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:22,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767974175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:22,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:22,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:26:22,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949948656] [2022-01-18 17:26:22,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:22,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:26:22,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:26:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:26:22,949 INFO L87 Difference]: Start difference. First operand 4483 states and 16238 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 17:26:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:26,542 INFO L93 Difference]: Finished difference Result 7638 states and 26005 transitions. [2022-01-18 17:26:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:26:26,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 26 [2022-01-18 17:26:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:26,556 INFO L225 Difference]: With dead ends: 7638 [2022-01-18 17:26:26,556 INFO L226 Difference]: Without dead ends: 7578 [2022-01-18 17:26:26,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=667, Invalid=3115, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:26:26,557 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 286 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:26,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 432 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1333 Invalid, 0 Unknown, 647 Unchecked, 0.8s Time] [2022-01-18 17:26:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2022-01-18 17:26:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 4603. [2022-01-18 17:26:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 3.6275532377227293) internal successors, (16694), 4602 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 16694 transitions. [2022-01-18 17:26:26,642 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 16694 transitions. Word has length 26 [2022-01-18 17:26:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:26,643 INFO L470 AbstractCegarLoop]: Abstraction has 4603 states and 16694 transitions. [2022-01-18 17:26:26,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2022-01-18 17:26:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 16694 transitions. [2022-01-18 17:26:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:26:26,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:26,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:26,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 17:26:26,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:26,862 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash -775305530, now seen corresponding path program 65 times [2022-01-18 17:26:26,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:26,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980381663] [2022-01-18 17:26:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:26,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:27,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:27,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980381663] [2022-01-18 17:26:27,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980381663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:27,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790117443] [2022-01-18 17:26:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:26:27,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:27,075 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 17:26:27,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:26:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:26:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:26:27,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:28,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:28,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:28,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 17:26:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:28,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:29,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:29,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 185 [2022-01-18 17:26:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:33,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790117443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:33,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:33,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:26:33,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63289846] [2022-01-18 17:26:33,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:33,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:26:33,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:26:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:26:33,699 INFO L87 Difference]: Start difference. First operand 4603 states and 16694 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:34,480 INFO L93 Difference]: Finished difference Result 6073 states and 21367 transitions. [2022-01-18 17:26:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:26:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:26:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:34,526 INFO L225 Difference]: With dead ends: 6073 [2022-01-18 17:26:34,526 INFO L226 Difference]: Without dead ends: 6058 [2022-01-18 17:26:34,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:26:34,526 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:34,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 427 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 434 Invalid, 0 Unknown, 412 Unchecked, 0.2s Time] [2022-01-18 17:26:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2022-01-18 17:26:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 4603. [2022-01-18 17:26:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 3.6275532377227293) internal successors, (16694), 4602 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 16694 transitions. [2022-01-18 17:26:34,603 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 16694 transitions. Word has length 26 [2022-01-18 17:26:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:34,603 INFO L470 AbstractCegarLoop]: Abstraction has 4603 states and 16694 transitions. [2022-01-18 17:26:34,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 16694 transitions. [2022-01-18 17:26:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:26:34,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:34,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:34,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 17:26:34,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:34,826 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:34,830 INFO L85 PathProgramCache]: Analyzing trace with hash -969474032, now seen corresponding path program 54 times [2022-01-18 17:26:34,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:34,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716596856] [2022-01-18 17:26:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:34,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:35,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716596856] [2022-01-18 17:26:35,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716596856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899666377] [2022-01-18 17:26:35,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:26:35,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:35,125 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:35,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 17:26:35,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:26:35,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:26:35,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:26:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:35,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:26:35,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:35,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-01-18 17:26:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:35,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:36,228 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:26:36,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-18 17:26:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:36,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899666377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:36,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:36,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 17:26:36,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756377325] [2022-01-18 17:26:36,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:36,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:26:36,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:26:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:26:36,826 INFO L87 Difference]: Start difference. First operand 4603 states and 16694 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:40,854 INFO L93 Difference]: Finished difference Result 6889 states and 24045 transitions. [2022-01-18 17:26:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:26:40,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:26:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:40,868 INFO L225 Difference]: With dead ends: 6889 [2022-01-18 17:26:40,868 INFO L226 Difference]: Without dead ends: 6859 [2022-01-18 17:26:40,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=892, Invalid=5428, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 17:26:40,869 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:40,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 596 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1879 Invalid, 0 Unknown, 575 Unchecked, 1.0s Time] [2022-01-18 17:26:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2022-01-18 17:26:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 4607. [2022-01-18 17:26:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 3.6265740338688666) internal successors, (16704), 4606 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 16704 transitions. [2022-01-18 17:26:40,953 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 16704 transitions. Word has length 26 [2022-01-18 17:26:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 16704 transitions. [2022-01-18 17:26:40,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 16704 transitions. [2022-01-18 17:26:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:26:40,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:40,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:40,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 17:26:41,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:41,174 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash -943378800, now seen corresponding path program 55 times [2022-01-18 17:26:41,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:41,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662669474] [2022-01-18 17:26:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:41,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:41,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:41,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662669474] [2022-01-18 17:26:41,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662669474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:41,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893315987] [2022-01-18 17:26:41,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:26:41,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:41,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:41,369 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:41,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 17:26:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:26:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:26:41,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:26:41,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:41,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 103 [2022-01-18 17:26:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:42,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:42,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-01-18 17:26:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:43,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893315987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:43,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:43,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 17:26:43,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915558141] [2022-01-18 17:26:43,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:43,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:26:43,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:26:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:26:43,106 INFO L87 Difference]: Start difference. First operand 4607 states and 16704 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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) [2022-01-18 17:26:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:45,464 INFO L93 Difference]: Finished difference Result 6744 states and 23385 transitions. [2022-01-18 17:26:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:26:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 26 [2022-01-18 17:26:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:45,478 INFO L225 Difference]: With dead ends: 6744 [2022-01-18 17:26:45,478 INFO L226 Difference]: Without dead ends: 6677 [2022-01-18 17:26:45,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=566, Invalid=2626, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:26:45,479 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 216 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:45,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 383 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1154 Invalid, 0 Unknown, 318 Unchecked, 0.6s Time] [2022-01-18 17:26:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6677 states. [2022-01-18 17:26:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6677 to 4732. [2022-01-18 17:26:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 3.6273515113083916) internal successors, (17161), 4731 states have internal predecessors, (17161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 17161 transitions. [2022-01-18 17:26:45,566 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 17161 transitions. Word has length 26 [2022-01-18 17:26:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:45,566 INFO L470 AbstractCegarLoop]: Abstraction has 4732 states and 17161 transitions. [2022-01-18 17:26:45,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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) [2022-01-18 17:26:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 17161 transitions. [2022-01-18 17:26:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:26:45,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:45,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:45,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 17:26:45,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 17:26:45,787 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1527556992, now seen corresponding path program 66 times [2022-01-18 17:26:45,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:45,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513870516] [2022-01-18 17:26:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:45,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:46,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513870516] [2022-01-18 17:26:46,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513870516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020130465] [2022-01-18 17:26:46,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:26:46,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:46,093 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:46,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:26:46,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:26:46,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 17:26:46,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:26:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:26:46,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:46,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 17:26:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:46,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:47,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:26:47,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:26:47,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 219 treesize of output 181 [2022-01-18 17:26:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:50,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020130465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:50,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:50,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:26:50,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114023790] [2022-01-18 17:26:50,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:50,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:26:50,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:26:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:26:50,331 INFO L87 Difference]: Start difference. First operand 4732 states and 17161 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:53,348 INFO L93 Difference]: Finished difference Result 7489 states and 25666 transitions. [2022-01-18 17:26:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:26:53,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:26:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:53,366 INFO L225 Difference]: With dead ends: 7489 [2022-01-18 17:26:53,366 INFO L226 Difference]: Without dead ends: 7459 [2022-01-18 17:26:53,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=563, Invalid=2859, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:26:53,367 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:53,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 452 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1477 Invalid, 0 Unknown, 474 Unchecked, 0.8s Time] [2022-01-18 17:26:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2022-01-18 17:26:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 4704. [2022-01-18 17:26:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 3.631724431214119) internal successors, (17080), 4703 states have internal predecessors, (17080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 17080 transitions. [2022-01-18 17:26:53,458 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 17080 transitions. Word has length 26 [2022-01-18 17:26:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:53,458 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 17080 transitions. [2022-01-18 17:26:53,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 17080 transitions. [2022-01-18 17:26:53,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:26:53,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:53,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:53,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 17:26:53,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 17:26:53,679 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:53,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1695376662, now seen corresponding path program 67 times [2022-01-18 17:26:53,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:53,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496176974] [2022-01-18 17:26:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:53,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:53,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496176974] [2022-01-18 17:26:53,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496176974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593277920] [2022-01-18 17:26:53,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:26:53,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:53,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:53,729 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:53,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:26:53,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:53,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 17:26:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:53,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:53,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593277920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:53,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:53,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:26:53,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118860981] [2022-01-18 17:26:53,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:53,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:26:53,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:26:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:26:53,988 INFO L87 Difference]: Start difference. First operand 4704 states and 17080 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:26:56,799 INFO L93 Difference]: Finished difference Result 12235 states and 39529 transitions. [2022-01-18 17:26:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-18 17:26:56,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 28 [2022-01-18 17:26:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:26:56,825 INFO L225 Difference]: With dead ends: 12235 [2022-01-18 17:26:56,825 INFO L226 Difference]: Without dead ends: 12235 [2022-01-18 17:26:56,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11197 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4782, Invalid=21300, Unknown=0, NotChecked=0, Total=26082 [2022-01-18 17:26:56,828 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 667 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:26:56,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 693 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:26:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12235 states. [2022-01-18 17:26:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12235 to 5135. [2022-01-18 17:26:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5135 states, 5134 states have (on average 3.7010128554733153) internal successors, (19001), 5134 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 19001 transitions. [2022-01-18 17:26:57,037 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 19001 transitions. Word has length 28 [2022-01-18 17:26:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:26:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 5135 states and 19001 transitions. [2022-01-18 17:26:57,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:26:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 19001 transitions. [2022-01-18 17:26:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:26:57,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:26:57,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:26:57,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 17:26:57,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:57,260 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:26:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:26:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1623271790, now seen corresponding path program 68 times [2022-01-18 17:26:57,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:26:57,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795156611] [2022-01-18 17:26:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:26:57,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:26:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:26:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:57,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:26:57,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795156611] [2022-01-18 17:26:57,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795156611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:26:57,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471315751] [2022-01-18 17:26:57,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:26:57,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:26:57,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:26:57,376 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:26:57,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 17:26:57,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:26:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:26:57,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:26:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:26:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:57,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:26:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:26:57,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471315751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:26:57,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:26:57,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:26:57,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503367628] [2022-01-18 17:26:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:26:57,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:26:57,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:26:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:26:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:26:57,790 INFO L87 Difference]: Start difference. First operand 5135 states and 19001 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:03,643 INFO L93 Difference]: Finished difference Result 16561 states and 52832 transitions. [2022-01-18 17:27:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2022-01-18 17:27:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:27:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:03,680 INFO L225 Difference]: With dead ends: 16561 [2022-01-18 17:27:03,680 INFO L226 Difference]: Without dead ends: 16561 [2022-01-18 17:27:03,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12551, Invalid=62251, Unknown=0, NotChecked=0, Total=74802 [2022-01-18 17:27:03,688 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1135 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:03,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 741 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 17:27:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16561 states. [2022-01-18 17:27:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16561 to 5210. [2022-01-18 17:27:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 5209 states have (on average 3.713956613553465) internal successors, (19346), 5209 states have internal predecessors, (19346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 19346 transitions. [2022-01-18 17:27:03,913 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 19346 transitions. Word has length 28 [2022-01-18 17:27:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:03,914 INFO L470 AbstractCegarLoop]: Abstraction has 5210 states and 19346 transitions. [2022-01-18 17:27:03,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 19346 transitions. [2022-01-18 17:27:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:03,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:03,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:03,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:04,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 17:27:04,136 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:04,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2104743426, now seen corresponding path program 69 times [2022-01-18 17:27:04,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:04,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292342887] [2022-01-18 17:27:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:04,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:04,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292342887] [2022-01-18 17:27:04,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292342887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117452314] [2022-01-18 17:27:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:27:04,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:04,189 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:04,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 17:27:04,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:27:04,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:04,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:04,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117452314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:04,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:04,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:27:04,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812447594] [2022-01-18 17:27:04,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:27:04,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:27:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:27:04,478 INFO L87 Difference]: Start difference. First operand 5210 states and 19346 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:08,102 INFO L93 Difference]: Finished difference Result 15109 states and 48587 transitions. [2022-01-18 17:27:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-18 17:27:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:27:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:08,132 INFO L225 Difference]: With dead ends: 15109 [2022-01-18 17:27:08,132 INFO L226 Difference]: Without dead ends: 15109 [2022-01-18 17:27:08,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16369 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6947, Invalid=30495, Unknown=0, NotChecked=0, Total=37442 [2022-01-18 17:27:08,134 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 823 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:08,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 819 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:27:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15109 states. [2022-01-18 17:27:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15109 to 5072. [2022-01-18 17:27:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 5071 states have (on average 3.6888187734174718) internal successors, (18706), 5071 states have internal predecessors, (18706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 18706 transitions. [2022-01-18 17:27:08,302 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 18706 transitions. Word has length 28 [2022-01-18 17:27:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:08,302 INFO L470 AbstractCegarLoop]: Abstraction has 5072 states and 18706 transitions. [2022-01-18 17:27:08,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 18706 transitions. [2022-01-18 17:27:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:08,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:08,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:08,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:08,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 17:27:08,529 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2132345370, now seen corresponding path program 56 times [2022-01-18 17:27:08,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:08,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742203211] [2022-01-18 17:27:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:08,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:08,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:08,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742203211] [2022-01-18 17:27:08,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742203211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:08,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439252201] [2022-01-18 17:27:08,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:27:08,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:08,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:08,574 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:08,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 17:27:08,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:27:08,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:08,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:08,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:08,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439252201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:08,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:08,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 17:27:08,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853138337] [2022-01-18 17:27:08,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:08,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:27:08,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:27:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:27:08,730 INFO L87 Difference]: Start difference. First operand 5072 states and 18706 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2022-01-18 17:27:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:09,800 INFO L93 Difference]: Finished difference Result 10751 states and 35542 transitions. [2022-01-18 17:27:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 17:27:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 28 [2022-01-18 17:27:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:09,825 INFO L225 Difference]: With dead ends: 10751 [2022-01-18 17:27:09,826 INFO L226 Difference]: Without dead ends: 10751 [2022-01-18 17:27:09,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1577, Invalid=6795, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 17:27:09,828 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 443 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:09,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 516 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:27:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2022-01-18 17:27:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 5108. [2022-01-18 17:27:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 3.6839631877814765) internal successors, (18814), 5107 states have internal predecessors, (18814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 18814 transitions. [2022-01-18 17:27:09,991 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 18814 transitions. Word has length 28 [2022-01-18 17:27:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:09,992 INFO L470 AbstractCegarLoop]: Abstraction has 5108 states and 18814 transitions. [2022-01-18 17:27:09,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2022-01-18 17:27:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 18814 transitions. [2022-01-18 17:27:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:10,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:10,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:10,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 17:27:10,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-01-18 17:27:10,210 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1464752888, now seen corresponding path program 70 times [2022-01-18 17:27:10,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:10,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254713989] [2022-01-18 17:27:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:10,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:10,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:10,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254713989] [2022-01-18 17:27:10,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254713989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:10,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026776517] [2022-01-18 17:27:10,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:27:10,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:10,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:10,256 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:10,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 17:27:10,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:27:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:10,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:10,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:10,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:10,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026776517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:10,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:10,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:27:10,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548845211] [2022-01-18 17:27:10,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:10,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:27:10,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:27:10,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:27:10,554 INFO L87 Difference]: Start difference. First operand 5108 states and 18814 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:12,853 INFO L93 Difference]: Finished difference Result 12573 states and 40424 transitions. [2022-01-18 17:27:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-18 17:27:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:27:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:12,876 INFO L225 Difference]: With dead ends: 12573 [2022-01-18 17:27:12,876 INFO L226 Difference]: Without dead ends: 12573 [2022-01-18 17:27:12,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4362, Invalid=20444, Unknown=0, NotChecked=0, Total=24806 [2022-01-18 17:27:12,879 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 697 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:12,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 581 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:27:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12573 states. [2022-01-18 17:27:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12573 to 5097. [2022-01-18 17:27:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5097 states, 5096 states have (on average 3.6805337519623236) internal successors, (18756), 5096 states have internal predecessors, (18756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 18756 transitions. [2022-01-18 17:27:13,017 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 18756 transitions. Word has length 28 [2022-01-18 17:27:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:13,017 INFO L470 AbstractCegarLoop]: Abstraction has 5097 states and 18756 transitions. [2022-01-18 17:27:13,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 18756 transitions. [2022-01-18 17:27:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:13,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:13,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:13,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:13,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 17:27:13,227 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1584284586, now seen corresponding path program 71 times [2022-01-18 17:27:13,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:13,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516593647] [2022-01-18 17:27:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:13,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:13,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:13,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516593647] [2022-01-18 17:27:13,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516593647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:13,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625263320] [2022-01-18 17:27:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:27:13,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:13,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:13,282 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:13,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 17:27:13,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:27:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:27:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:13,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:13,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625263320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:13,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:13,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 17:27:13,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661886266] [2022-01-18 17:27:13,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:13,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:27:13,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:27:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:27:13,497 INFO L87 Difference]: Start difference. First operand 5097 states and 18756 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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) [2022-01-18 17:27:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:14,922 INFO L93 Difference]: Finished difference Result 11621 states and 39062 transitions. [2022-01-18 17:27:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 17:27:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 28 [2022-01-18 17:27:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:14,944 INFO L225 Difference]: With dead ends: 11621 [2022-01-18 17:27:14,944 INFO L226 Difference]: Without dead ends: 11571 [2022-01-18 17:27:14,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2755, Invalid=8801, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 17:27:14,945 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 565 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:14,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 263 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2022-01-18 17:27:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 6133. [2022-01-18 17:27:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6133 states, 6132 states have (on average 3.7909328114807566) internal successors, (23246), 6132 states have internal predecessors, (23246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 23246 transitions. [2022-01-18 17:27:15,094 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 23246 transitions. Word has length 28 [2022-01-18 17:27:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:15,094 INFO L470 AbstractCegarLoop]: Abstraction has 6133 states and 23246 transitions. [2022-01-18 17:27:15,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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) [2022-01-18 17:27:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 23246 transitions. [2022-01-18 17:27:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:15,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:15,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:15,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:15,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:15,305 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1730816090, now seen corresponding path program 57 times [2022-01-18 17:27:15,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:15,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756794882] [2022-01-18 17:27:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:15,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:15,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756794882] [2022-01-18 17:27:15,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756794882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912907030] [2022-01-18 17:27:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:27:15,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:15,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:15,380 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:15,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 17:27:15,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:27:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:15,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:15,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912907030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:15,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:15,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 17:27:15,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884865228] [2022-01-18 17:27:15,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:15,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:27:15,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:27:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:27:15,509 INFO L87 Difference]: Start difference. First operand 6133 states and 23246 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:15,993 INFO L93 Difference]: Finished difference Result 10528 states and 37795 transitions. [2022-01-18 17:27:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:27:15,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 28 [2022-01-18 17:27:15,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:16,013 INFO L225 Difference]: With dead ends: 10528 [2022-01-18 17:27:16,013 INFO L226 Difference]: Without dead ends: 10412 [2022-01-18 17:27:16,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:27:16,014 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 448 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:16,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 173 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:27:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2022-01-18 17:27:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 7299. [2022-01-18 17:27:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7299 states, 7298 states have (on average 3.8140586462044395) internal successors, (27835), 7298 states have internal predecessors, (27835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7299 states to 7299 states and 27835 transitions. [2022-01-18 17:27:16,162 INFO L78 Accepts]: Start accepts. Automaton has 7299 states and 27835 transitions. Word has length 28 [2022-01-18 17:27:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:16,162 INFO L470 AbstractCegarLoop]: Abstraction has 7299 states and 27835 transitions. [2022-01-18 17:27:16,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7299 states and 27835 transitions. [2022-01-18 17:27:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:16,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:16,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:16,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:16,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:16,387 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593234, now seen corresponding path program 72 times [2022-01-18 17:27:16,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:16,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490197912] [2022-01-18 17:27:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:16,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:16,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490197912] [2022-01-18 17:27:16,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490197912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868609248] [2022-01-18 17:27:16,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:27:16,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:16,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:16,428 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:16,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 17:27:16,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:27:16,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:16,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:27:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:16,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:16,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868609248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:16,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:16,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 17:27:16,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325387877] [2022-01-18 17:27:16,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:16,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:27:16,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:27:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:27:16,690 INFO L87 Difference]: Start difference. First operand 7299 states and 27835 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2022-01-18 17:27:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:18,282 INFO L93 Difference]: Finished difference Result 13328 states and 45017 transitions. [2022-01-18 17:27:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 17:27:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 28 [2022-01-18 17:27:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:18,310 INFO L225 Difference]: With dead ends: 13328 [2022-01-18 17:27:18,310 INFO L226 Difference]: Without dead ends: 13262 [2022-01-18 17:27:18,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2636, Invalid=7870, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 17:27:18,312 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 894 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:18,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 252 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13262 states. [2022-01-18 17:27:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13262 to 7351. [2022-01-18 17:27:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 7350 states have (on average 3.812108843537415) internal successors, (28019), 7350 states have internal predecessors, (28019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 28019 transitions. [2022-01-18 17:27:18,500 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 28019 transitions. Word has length 28 [2022-01-18 17:27:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:18,500 INFO L470 AbstractCegarLoop]: Abstraction has 7351 states and 28019 transitions. [2022-01-18 17:27:18,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2022-01-18 17:27:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 28019 transitions. [2022-01-18 17:27:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:18,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:18,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:18,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:18,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-01-18 17:27:18,718 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash -502180452, now seen corresponding path program 73 times [2022-01-18 17:27:18,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:18,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650860214] [2022-01-18 17:27:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:18,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:18,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:18,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650860214] [2022-01-18 17:27:18,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650860214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:18,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040853640] [2022-01-18 17:27:18,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:27:18,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:18,774 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:18,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 17:27:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:27:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:18,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:18,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040853640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:18,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:18,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 17:27:18,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195106457] [2022-01-18 17:27:18,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:18,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:27:18,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:27:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:27:18,928 INFO L87 Difference]: Start difference. First operand 7351 states and 28019 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2022-01-18 17:27:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:20,119 INFO L93 Difference]: Finished difference Result 12104 states and 41519 transitions. [2022-01-18 17:27:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 17:27:20,119 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 28 [2022-01-18 17:27:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:20,141 INFO L225 Difference]: With dead ends: 12104 [2022-01-18 17:27:20,141 INFO L226 Difference]: Without dead ends: 12007 [2022-01-18 17:27:20,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:27:20,141 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 589 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:20,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 250 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:27:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12007 states. [2022-01-18 17:27:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12007 to 7300. [2022-01-18 17:27:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7300 states, 7299 states have (on average 3.8177832579805453) internal successors, (27866), 7299 states have internal predecessors, (27866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7300 states to 7300 states and 27866 transitions. [2022-01-18 17:27:20,307 INFO L78 Accepts]: Start accepts. Automaton has 7300 states and 27866 transitions. Word has length 28 [2022-01-18 17:27:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:20,307 INFO L470 AbstractCegarLoop]: Abstraction has 7300 states and 27866 transitions. [2022-01-18 17:27:20,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2022-01-18 17:27:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7300 states and 27866 transitions. [2022-01-18 17:27:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:20,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:20,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:20,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:20,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:20,534 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:20,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:20,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1763655766, now seen corresponding path program 74 times [2022-01-18 17:27:20,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:20,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135139672] [2022-01-18 17:27:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:20,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:20,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135139672] [2022-01-18 17:27:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135139672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077095160] [2022-01-18 17:27:20,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:27:20,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:20,561 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:20,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 17:27:20,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:27:20,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:20,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:27:20,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:20,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:20,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077095160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:20,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:20,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 17:27:20,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096334556] [2022-01-18 17:27:20,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:20,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:27:20,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:27:20,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:27:20,748 INFO L87 Difference]: Start difference. First operand 7300 states and 27866 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2022-01-18 17:27:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:20,990 INFO L93 Difference]: Finished difference Result 9788 states and 35030 transitions. [2022-01-18 17:27:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:27:20,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 28 [2022-01-18 17:27:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:21,009 INFO L225 Difference]: With dead ends: 9788 [2022-01-18 17:27:21,009 INFO L226 Difference]: Without dead ends: 9681 [2022-01-18 17:27:21,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:27:21,009 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 271 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:21,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 66 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:27:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9681 states. [2022-01-18 17:27:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9681 to 7304. [2022-01-18 17:27:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7304 states, 7303 states have (on average 3.8092564699438585) internal successors, (27819), 7303 states have internal predecessors, (27819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 27819 transitions. [2022-01-18 17:27:21,150 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 27819 transitions. Word has length 28 [2022-01-18 17:27:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:21,151 INFO L470 AbstractCegarLoop]: Abstraction has 7304 states and 27819 transitions. [2022-01-18 17:27:21,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2022-01-18 17:27:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 27819 transitions. [2022-01-18 17:27:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:21,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:21,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:21,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:21,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:21,378 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1550979374, now seen corresponding path program 75 times [2022-01-18 17:27:21,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:21,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749336457] [2022-01-18 17:27:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:21,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:21,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749336457] [2022-01-18 17:27:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749336457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347584442] [2022-01-18 17:27:21,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:27:21,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:21,415 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:21,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 17:27:21,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:27:21,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:27:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:21,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:21,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347584442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:21,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:21,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 17:27:21,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796005064] [2022-01-18 17:27:21,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:21,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:27:21,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:21,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:27:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:27:21,603 INFO L87 Difference]: Start difference. First operand 7304 states and 27819 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:22,974 INFO L93 Difference]: Finished difference Result 16226 states and 54409 transitions. [2022-01-18 17:27:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:27:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-01-18 17:27:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:23,005 INFO L225 Difference]: With dead ends: 16226 [2022-01-18 17:27:23,006 INFO L226 Difference]: Without dead ends: 16085 [2022-01-18 17:27:23,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1663, Invalid=5647, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:27:23,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 592 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:23,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 245 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16085 states. [2022-01-18 17:27:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16085 to 7577. [2022-01-18 17:27:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.829857444561774) internal successors, (29015), 7576 states have internal predecessors, (29015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 29015 transitions. [2022-01-18 17:27:23,222 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 29015 transitions. Word has length 28 [2022-01-18 17:27:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:23,222 INFO L470 AbstractCegarLoop]: Abstraction has 7577 states and 29015 transitions. [2022-01-18 17:27:23,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 29015 transitions. [2022-01-18 17:27:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:23,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:23,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:23,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:23,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 17:27:23,443 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1870087530, now seen corresponding path program 76 times [2022-01-18 17:27:23,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:23,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486592753] [2022-01-18 17:27:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:23,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:23,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:23,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486592753] [2022-01-18 17:27:23,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486592753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582111524] [2022-01-18 17:27:23,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:27:23,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:23,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:23,481 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:23,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 17:27:23,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:27:23,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:27:23,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:23,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:23,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582111524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:23,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:23,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2022-01-18 17:27:23,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299448347] [2022-01-18 17:27:23,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:23,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:27:23,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:27:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:27:23,646 INFO L87 Difference]: Start difference. First operand 7577 states and 29015 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:24,037 INFO L93 Difference]: Finished difference Result 12486 states and 43455 transitions. [2022-01-18 17:27:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:27:24,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 28 [2022-01-18 17:27:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:24,061 INFO L225 Difference]: With dead ends: 12486 [2022-01-18 17:27:24,062 INFO L226 Difference]: Without dead ends: 12486 [2022-01-18 17:27:24,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=464, Invalid=868, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:27:24,062 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 402 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:24,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 102 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:27:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12486 states. [2022-01-18 17:27:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12486 to 7253. [2022-01-18 17:27:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7253 states, 7252 states have (on average 3.8084666298952015) internal successors, (27619), 7252 states have internal predecessors, (27619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7253 states to 7253 states and 27619 transitions. [2022-01-18 17:27:24,217 INFO L78 Accepts]: Start accepts. Automaton has 7253 states and 27619 transitions. Word has length 28 [2022-01-18 17:27:24,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:24,217 INFO L470 AbstractCegarLoop]: Abstraction has 7253 states and 27619 transitions. [2022-01-18 17:27:24,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7253 states and 27619 transitions. [2022-01-18 17:27:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:24,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:24,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:24,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:24,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 17:27:24,432 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -813882188, now seen corresponding path program 77 times [2022-01-18 17:27:24,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:24,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548992845] [2022-01-18 17:27:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:24,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:24,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548992845] [2022-01-18 17:27:24,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548992845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360687474] [2022-01-18 17:27:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:27:24,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:24,497 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:24,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 17:27:24,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:27:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:24,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:24,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360687474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:24,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:24,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 17:27:24,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857843430] [2022-01-18 17:27:24,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:24,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:27:24,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:24,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:27:24,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:27:24,705 INFO L87 Difference]: Start difference. First operand 7253 states and 27619 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:25,971 INFO L93 Difference]: Finished difference Result 16426 states and 56150 transitions. [2022-01-18 17:27:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 17:27:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-01-18 17:27:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:26,005 INFO L225 Difference]: With dead ends: 16426 [2022-01-18 17:27:26,005 INFO L226 Difference]: Without dead ends: 16426 [2022-01-18 17:27:26,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1779, Invalid=6231, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:27:26,006 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 509 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:26,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 385 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16426 states. [2022-01-18 17:27:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16426 to 7363. [2022-01-18 17:27:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7363 states, 7362 states have (on average 3.815131757674545) internal successors, (28087), 7362 states have internal predecessors, (28087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7363 states to 7363 states and 28087 transitions. [2022-01-18 17:27:26,217 INFO L78 Accepts]: Start accepts. Automaton has 7363 states and 28087 transitions. Word has length 28 [2022-01-18 17:27:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:26,217 INFO L470 AbstractCegarLoop]: Abstraction has 7363 states and 28087 transitions. [2022-01-18 17:27:26,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7363 states and 28087 transitions. [2022-01-18 17:27:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:26,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:26,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:26,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:26,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 17:27:26,443 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash -28968094, now seen corresponding path program 78 times [2022-01-18 17:27:26,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:26,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525687479] [2022-01-18 17:27:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:26,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:26,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525687479] [2022-01-18 17:27:26,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525687479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125310944] [2022-01-18 17:27:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:27:26,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:26,484 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:26,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 17:27:26,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:27:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:26,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:26,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125310944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:26,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:26,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 17:27:26,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957648148] [2022-01-18 17:27:26,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:26,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:27:26,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:27:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:27:26,691 INFO L87 Difference]: Start difference. First operand 7363 states and 28087 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:27,935 INFO L93 Difference]: Finished difference Result 16431 states and 56503 transitions. [2022-01-18 17:27:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 17:27:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-01-18 17:27:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:27,966 INFO L225 Difference]: With dead ends: 16431 [2022-01-18 17:27:27,966 INFO L226 Difference]: Without dead ends: 16431 [2022-01-18 17:27:27,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1581, Invalid=5901, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 17:27:27,967 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 499 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:27,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 405 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16431 states. [2022-01-18 17:27:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16431 to 7501. [2022-01-18 17:27:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7501 states, 7500 states have (on average 3.8056) internal successors, (28542), 7500 states have internal predecessors, (28542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7501 states to 7501 states and 28542 transitions. [2022-01-18 17:27:28,171 INFO L78 Accepts]: Start accepts. Automaton has 7501 states and 28542 transitions. Word has length 28 [2022-01-18 17:27:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:28,171 INFO L470 AbstractCegarLoop]: Abstraction has 7501 states and 28542 transitions. [2022-01-18 17:27:28,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 7501 states and 28542 transitions. [2022-01-18 17:27:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:28,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:28,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:28,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 17:27:28,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:28,398 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1111990750, now seen corresponding path program 79 times [2022-01-18 17:27:28,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:28,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88904938] [2022-01-18 17:27:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:28,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:28,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:28,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88904938] [2022-01-18 17:27:28,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88904938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:28,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323014128] [2022-01-18 17:27:28,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:27:28,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:28,430 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:28,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 17:27:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:27:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:28,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:28,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323014128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:28,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:28,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 17:27:28,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783282214] [2022-01-18 17:27:28,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:28,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:27:28,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:27:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:27:28,610 INFO L87 Difference]: Start difference. First operand 7501 states and 28542 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:29,812 INFO L93 Difference]: Finished difference Result 18688 states and 62579 transitions. [2022-01-18 17:27:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 17:27:29,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-01-18 17:27:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:29,850 INFO L225 Difference]: With dead ends: 18688 [2022-01-18 17:27:29,851 INFO L226 Difference]: Without dead ends: 18632 [2022-01-18 17:27:29,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 17:27:29,852 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 606 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:29,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 266 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18632 states. [2022-01-18 17:27:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18632 to 8880. [2022-01-18 17:27:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8880 states, 8879 states have (on average 3.849983106205654) internal successors, (34184), 8879 states have internal predecessors, (34184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 34184 transitions. [2022-01-18 17:27:30,143 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 34184 transitions. Word has length 28 [2022-01-18 17:27:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:30,143 INFO L470 AbstractCegarLoop]: Abstraction has 8880 states and 34184 transitions. [2022-01-18 17:27:30,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 34184 transitions. [2022-01-18 17:27:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:30,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:30,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:30,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:30,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 17:27:30,372 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 359087368, now seen corresponding path program 80 times [2022-01-18 17:27:30,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:30,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476867679] [2022-01-18 17:27:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:30,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:30,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476867679] [2022-01-18 17:27:30,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476867679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037762644] [2022-01-18 17:27:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:27:30,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:30,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:30,398 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:30,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 17:27:30,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:27:30,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:30,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:27:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:30,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:30,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037762644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:30,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:30,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 17:27:30,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110972369] [2022-01-18 17:27:30,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:30,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:27:30,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:27:30,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:27:30,519 INFO L87 Difference]: Start difference. First operand 8880 states and 34184 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:31,617 INFO L93 Difference]: Finished difference Result 19256 states and 64283 transitions. [2022-01-18 17:27:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 17:27:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-01-18 17:27:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:31,667 INFO L225 Difference]: With dead ends: 19256 [2022-01-18 17:27:31,667 INFO L226 Difference]: Without dead ends: 19256 [2022-01-18 17:27:31,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 17:27:31,668 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 636 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:31,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 299 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:27:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19256 states. [2022-01-18 17:27:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19256 to 8630. [2022-01-18 17:27:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 3.8324255417777264) internal successors, (33070), 8629 states have internal predecessors, (33070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 33070 transitions. [2022-01-18 17:27:32,059 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 33070 transitions. Word has length 28 [2022-01-18 17:27:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:32,059 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 33070 transitions. [2022-01-18 17:27:32,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 33070 transitions. [2022-01-18 17:27:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:32,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:32,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:32,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 17:27:32,287 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash -73789236, now seen corresponding path program 81 times [2022-01-18 17:27:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517075815] [2022-01-18 17:27:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:32,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:32,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517075815] [2022-01-18 17:27:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517075815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:32,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265882142] [2022-01-18 17:27:32,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:27:32,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:32,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:32,314 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:32,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 17:27:32,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 17:27:32,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:32,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:32,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:32,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265882142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:32,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:32,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 17:27:32,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258636490] [2022-01-18 17:27:32,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:32,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:27:32,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:27:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:27:32,470 INFO L87 Difference]: Start difference. First operand 8630 states and 33070 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:33,590 INFO L93 Difference]: Finished difference Result 17367 states and 60928 transitions. [2022-01-18 17:27:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 17:27:33,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-01-18 17:27:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:33,627 INFO L225 Difference]: With dead ends: 17367 [2022-01-18 17:27:33,628 INFO L226 Difference]: Without dead ends: 17359 [2022-01-18 17:27:33,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1477, Invalid=5003, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:27:33,629 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 589 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:33,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 286 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:27:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17359 states. [2022-01-18 17:27:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17359 to 8340. [2022-01-18 17:27:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8340 states, 8339 states have (on average 3.849742175320782) internal successors, (32103), 8339 states have internal predecessors, (32103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8340 states to 8340 states and 32103 transitions. [2022-01-18 17:27:33,866 INFO L78 Accepts]: Start accepts. Automaton has 8340 states and 32103 transitions. Word has length 28 [2022-01-18 17:27:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:33,866 INFO L470 AbstractCegarLoop]: Abstraction has 8340 states and 32103 transitions. [2022-01-18 17:27:33,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8340 states and 32103 transitions. [2022-01-18 17:27:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:33,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:33,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:33,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:34,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:34,089 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:34,089 INFO L85 PathProgramCache]: Analyzing trace with hash -345798426, now seen corresponding path program 82 times [2022-01-18 17:27:34,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:34,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109486492] [2022-01-18 17:27:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:34,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:34,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:34,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109486492] [2022-01-18 17:27:34,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109486492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:34,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980540689] [2022-01-18 17:27:34,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:27:34,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:34,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:34,120 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:34,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 17:27:34,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:27:34,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:34,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:34,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980540689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:34,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:34,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:27:34,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763557400] [2022-01-18 17:27:34,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:34,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:27:34,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:27:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:27:34,374 INFO L87 Difference]: Start difference. First operand 8340 states and 32103 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:37,118 INFO L93 Difference]: Finished difference Result 24954 states and 86653 transitions. [2022-01-18 17:27:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-01-18 17:27:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:27:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:37,176 INFO L225 Difference]: With dead ends: 24954 [2022-01-18 17:27:37,176 INFO L226 Difference]: Without dead ends: 24954 [2022-01-18 17:27:37,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20010 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=8056, Invalid=35000, Unknown=0, NotChecked=0, Total=43056 [2022-01-18 17:27:37,181 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 911 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:37,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 492 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:27:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24954 states. [2022-01-18 17:27:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24954 to 8807. [2022-01-18 17:27:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 3.902679990915285) internal successors, (34367), 8806 states have internal predecessors, (34367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 34367 transitions. [2022-01-18 17:27:37,547 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 34367 transitions. Word has length 28 [2022-01-18 17:27:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:37,547 INFO L470 AbstractCegarLoop]: Abstraction has 8807 states and 34367 transitions. [2022-01-18 17:27:37,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 34367 transitions. [2022-01-18 17:27:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:37,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:37,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:37,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:37,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:37,777 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:37,777 INFO L85 PathProgramCache]: Analyzing trace with hash 221153654, now seen corresponding path program 83 times [2022-01-18 17:27:37,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:37,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609860800] [2022-01-18 17:27:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:37,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:37,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609860800] [2022-01-18 17:27:37,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609860800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447689935] [2022-01-18 17:27:37,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:27:37,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:37,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:37,813 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:37,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 17:27:37,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:27:37,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:37,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:37,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:37,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447689935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:37,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:37,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:27:37,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115977489] [2022-01-18 17:27:37,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:37,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:27:37,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:27:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:27:37,987 INFO L87 Difference]: Start difference. First operand 8807 states and 34367 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:40,165 INFO L93 Difference]: Finished difference Result 23265 states and 81072 transitions. [2022-01-18 17:27:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-18 17:27:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:27:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:40,218 INFO L225 Difference]: With dead ends: 23265 [2022-01-18 17:27:40,219 INFO L226 Difference]: Without dead ends: 23265 [2022-01-18 17:27:40,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11843 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5497, Invalid=20263, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 17:27:40,220 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1034 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:40,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 456 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:27:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23265 states. [2022-01-18 17:27:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23265 to 8714. [2022-01-18 17:27:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 3.888442557098588) internal successors, (33880), 8713 states have internal predecessors, (33880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 33880 transitions. [2022-01-18 17:27:40,558 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 33880 transitions. Word has length 28 [2022-01-18 17:27:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:40,559 INFO L470 AbstractCegarLoop]: Abstraction has 8714 states and 33880 transitions. [2022-01-18 17:27:40,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 33880 transitions. [2022-01-18 17:27:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:40,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:40,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:40,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:40,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:40,776 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:40,777 INFO L85 PathProgramCache]: Analyzing trace with hash -951192204, now seen corresponding path program 84 times [2022-01-18 17:27:40,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:40,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350737399] [2022-01-18 17:27:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:40,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:40,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:40,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350737399] [2022-01-18 17:27:40,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350737399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:40,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491312910] [2022-01-18 17:27:40,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:27:40,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:40,807 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:40,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 17:27:40,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:27:40,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:40,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:40,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491312910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:40,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-01-18 17:27:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562314193] [2022-01-18 17:27:40,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:40,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:27:40,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:27:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:27:40,998 INFO L87 Difference]: Start difference. First operand 8714 states and 33880 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:42,849 INFO L93 Difference]: Finished difference Result 21570 states and 73897 transitions. [2022-01-18 17:27:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 17:27:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-01-18 17:27:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:42,891 INFO L225 Difference]: With dead ends: 21570 [2022-01-18 17:27:42,891 INFO L226 Difference]: Without dead ends: 21570 [2022-01-18 17:27:42,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9692 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4569, Invalid=16893, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 17:27:42,892 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 791 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:42,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 390 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21570 states. [2022-01-18 17:27:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21570 to 8772. [2022-01-18 17:27:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 3.8895222893626724) internal successors, (34115), 8771 states have internal predecessors, (34115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 34115 transitions. [2022-01-18 17:27:43,187 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 34115 transitions. Word has length 28 [2022-01-18 17:27:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:43,187 INFO L470 AbstractCegarLoop]: Abstraction has 8772 states and 34115 transitions. [2022-01-18 17:27:43,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 34115 transitions. [2022-01-18 17:27:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:43,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:43,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:43,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:43,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:43,404 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash -869816116, now seen corresponding path program 85 times [2022-01-18 17:27:43,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:43,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188749226] [2022-01-18 17:27:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:43,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:43,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188749226] [2022-01-18 17:27:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188749226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005513126] [2022-01-18 17:27:43,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:27:43,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:43,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:43,433 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:43,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 17:27:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:43,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:43,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:43,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005513126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:43,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:43,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-01-18 17:27:43,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82835130] [2022-01-18 17:27:43,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:43,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:27:43,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:27:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:27:43,611 INFO L87 Difference]: Start difference. First operand 8772 states and 34115 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:45,322 INFO L93 Difference]: Finished difference Result 20595 states and 71416 transitions. [2022-01-18 17:27:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 17:27:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-01-18 17:27:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:45,366 INFO L225 Difference]: With dead ends: 20595 [2022-01-18 17:27:45,366 INFO L226 Difference]: Without dead ends: 20583 [2022-01-18 17:27:45,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7060 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3686, Invalid=13084, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 17:27:45,368 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 780 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:45,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 402 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20583 states. [2022-01-18 17:27:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20583 to 8591. [2022-01-18 17:27:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 3.873923166472643) internal successors, (33277), 8590 states have internal predecessors, (33277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 33277 transitions. [2022-01-18 17:27:45,682 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 33277 transitions. Word has length 28 [2022-01-18 17:27:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:45,682 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 33277 transitions. [2022-01-18 17:27:45,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 33277 transitions. [2022-01-18 17:27:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:45,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:45,696 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:45,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:45,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 17:27:45,909 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash 60841100, now seen corresponding path program 86 times [2022-01-18 17:27:45,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:45,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73185468] [2022-01-18 17:27:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:45,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:45,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:45,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73185468] [2022-01-18 17:27:45,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73185468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:45,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711890307] [2022-01-18 17:27:45,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:27:45,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:45,949 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:45,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 17:27:45,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:27:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:45,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:46,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:46,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711890307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:46,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:46,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:27:46,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625530481] [2022-01-18 17:27:46,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:46,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:27:46,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:27:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:27:46,197 INFO L87 Difference]: Start difference. First operand 8591 states and 33277 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:27:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:48,702 INFO L93 Difference]: Finished difference Result 19989 states and 68270 transitions. [2022-01-18 17:27:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 17:27:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 28 [2022-01-18 17:27:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:48,745 INFO L225 Difference]: With dead ends: 19989 [2022-01-18 17:27:48,745 INFO L226 Difference]: Without dead ends: 19989 [2022-01-18 17:27:48,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9362 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4648, Invalid=17108, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 17:27:48,747 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 970 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:48,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 535 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:27:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19989 states. [2022-01-18 17:27:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19989 to 8609. [2022-01-18 17:27:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 3.874302973977695) internal successors, (33350), 8608 states have internal predecessors, (33350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 33350 transitions. [2022-01-18 17:27:49,041 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 33350 transitions. Word has length 28 [2022-01-18 17:27:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:49,041 INFO L470 AbstractCegarLoop]: Abstraction has 8609 states and 33350 transitions. [2022-01-18 17:27:49,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:27:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 33350 transitions. [2022-01-18 17:27:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:49,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:49,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:49,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:49,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 17:27:49,272 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1703880254, now seen corresponding path program 87 times [2022-01-18 17:27:49,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:49,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097472490] [2022-01-18 17:27:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:49,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:49,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097472490] [2022-01-18 17:27:49,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097472490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498269476] [2022-01-18 17:27:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:27:49,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:49,309 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:49,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 17:27:49,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 17:27:49,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:49,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:49,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:49,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:49,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498269476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:49,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:49,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:27:49,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716969702] [2022-01-18 17:27:49,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:49,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:27:49,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:27:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:27:49,531 INFO L87 Difference]: Start difference. First operand 8609 states and 33350 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:27:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:52,266 INFO L93 Difference]: Finished difference Result 19311 states and 67454 transitions. [2022-01-18 17:27:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-18 17:27:52,266 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 28 [2022-01-18 17:27:52,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:52,316 INFO L225 Difference]: With dead ends: 19311 [2022-01-18 17:27:52,316 INFO L226 Difference]: Without dead ends: 19303 [2022-01-18 17:27:52,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12787 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5782, Invalid=23974, Unknown=0, NotChecked=0, Total=29756 [2022-01-18 17:27:52,320 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 768 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:52,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 607 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:27:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19303 states. [2022-01-18 17:27:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19303 to 7736. [2022-01-18 17:27:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7736 states, 7735 states have (on average 3.799095022624434) internal successors, (29386), 7735 states have internal predecessors, (29386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7736 states to 7736 states and 29386 transitions. [2022-01-18 17:27:52,712 INFO L78 Accepts]: Start accepts. Automaton has 7736 states and 29386 transitions. Word has length 28 [2022-01-18 17:27:52,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:52,712 INFO L470 AbstractCegarLoop]: Abstraction has 7736 states and 29386 transitions. [2022-01-18 17:27:52,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:27:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 7736 states and 29386 transitions. [2022-01-18 17:27:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:52,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:52,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:52,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:52,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 17:27:52,943 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1787283834, now seen corresponding path program 88 times [2022-01-18 17:27:52,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:52,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712133186] [2022-01-18 17:27:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:52,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:52,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712133186] [2022-01-18 17:27:52,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712133186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870422362] [2022-01-18 17:27:52,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:27:52,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:52,971 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:52,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 17:27:52,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:27:52,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:52,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:53,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:53,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870422362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:53,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:53,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 17:27:53,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034182957] [2022-01-18 17:27:53,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:53,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:27:53,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:27:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:27:53,128 INFO L87 Difference]: Start difference. First operand 7736 states and 29386 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:54,768 INFO L93 Difference]: Finished difference Result 16868 states and 56894 transitions. [2022-01-18 17:27:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 17:27:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-01-18 17:27:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:54,807 INFO L225 Difference]: With dead ends: 16868 [2022-01-18 17:27:54,807 INFO L226 Difference]: Without dead ends: 16868 [2022-01-18 17:27:54,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3292, Invalid=14264, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 17:27:54,809 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 617 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:54,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 433 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:27:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16868 states. [2022-01-18 17:27:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16868 to 7752. [2022-01-18 17:27:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.798219584569733) internal successors, (29440), 7751 states have internal predecessors, (29440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29440 transitions. [2022-01-18 17:27:55,094 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29440 transitions. Word has length 28 [2022-01-18 17:27:55,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:55,094 INFO L470 AbstractCegarLoop]: Abstraction has 7752 states and 29440 transitions. [2022-01-18 17:27:55,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:55,094 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29440 transitions. [2022-01-18 17:27:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:55,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:55,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:55,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:55,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:55,319 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:55,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:55,320 INFO L85 PathProgramCache]: Analyzing trace with hash -854323286, now seen corresponding path program 89 times [2022-01-18 17:27:55,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:55,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832512719] [2022-01-18 17:27:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:55,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:55,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:55,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832512719] [2022-01-18 17:27:55,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832512719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:55,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600292811] [2022-01-18 17:27:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:27:55,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:55,354 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:55,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 17:27:55,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:27:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:55,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:55,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600292811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:55,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:55,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:27:55,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13406897] [2022-01-18 17:27:55,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:55,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:27:55,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:27:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:27:55,547 INFO L87 Difference]: Start difference. First operand 7752 states and 29440 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:27:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:27:58,109 INFO L93 Difference]: Finished difference Result 17727 states and 59236 transitions. [2022-01-18 17:27:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-01-18 17:27:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 28 [2022-01-18 17:27:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:27:58,145 INFO L225 Difference]: With dead ends: 17727 [2022-01-18 17:27:58,145 INFO L226 Difference]: Without dead ends: 17727 [2022-01-18 17:27:58,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15849 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5934, Invalid=30356, Unknown=0, NotChecked=0, Total=36290 [2022-01-18 17:27:58,149 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 909 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:27:58,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 632 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:27:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17727 states. [2022-01-18 17:27:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17727 to 7860. [2022-01-18 17:27:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7860 states, 7859 states have (on average 3.7900496246341775) internal successors, (29786), 7859 states have internal predecessors, (29786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:27:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7860 states to 7860 states and 29786 transitions. [2022-01-18 17:27:58,392 INFO L78 Accepts]: Start accepts. Automaton has 7860 states and 29786 transitions. Word has length 28 [2022-01-18 17:27:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:27:58,392 INFO L470 AbstractCegarLoop]: Abstraction has 7860 states and 29786 transitions. [2022-01-18 17:27:58,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:27:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 7860 states and 29786 transitions. [2022-01-18 17:27:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:27:58,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:27:58,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:27:58,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 17:27:58,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:58,619 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:27:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:27:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash 788715868, now seen corresponding path program 90 times [2022-01-18 17:27:58,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:27:58,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042007609] [2022-01-18 17:27:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:27:58,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:27:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:27:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:58,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:27:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042007609] [2022-01-18 17:27:58,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042007609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:27:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68932791] [2022-01-18 17:27:58,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:27:58,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:27:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:27:58,648 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:27:58,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 17:27:58,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 17:27:58,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:27:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:27:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:27:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:58,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:27:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:27:58,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68932791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:27:58,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:27:58,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:27:58,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477110204] [2022-01-18 17:27:58,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:27:58,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:27:58,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:27:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:27:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:27:58,810 INFO L87 Difference]: Start difference. First operand 7860 states and 29786 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:28:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:28:01,083 INFO L93 Difference]: Finished difference Result 16323 states and 55354 transitions. [2022-01-18 17:28:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-18 17:28:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 28 [2022-01-18 17:28:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:28:01,119 INFO L225 Difference]: With dead ends: 16323 [2022-01-18 17:28:01,119 INFO L226 Difference]: Without dead ends: 16315 [2022-01-18 17:28:01,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9312 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4289, Invalid=18361, Unknown=0, NotChecked=0, Total=22650 [2022-01-18 17:28:01,121 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 678 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:28:01,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 557 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:28:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16315 states. [2022-01-18 17:28:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16315 to 7785. [2022-01-18 17:28:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7785 states, 7784 states have (on average 3.7918807810894144) internal successors, (29516), 7784 states have internal predecessors, (29516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 29516 transitions. [2022-01-18 17:28:01,384 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 29516 transitions. Word has length 28 [2022-01-18 17:28:01,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:28:01,384 INFO L470 AbstractCegarLoop]: Abstraction has 7785 states and 29516 transitions. [2022-01-18 17:28:01,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2022-01-18 17:28:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 29516 transitions. [2022-01-18 17:28:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:28:01,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:28:01,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:28:01,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 17:28:01,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 17:28:01,615 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:28:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:28:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1368159092, now seen corresponding path program 58 times [2022-01-18 17:28:01,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:28:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198456269] [2022-01-18 17:28:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:28:01,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:28:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:28:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:01,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:28:01,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198456269] [2022-01-18 17:28:01,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198456269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:28:01,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600446182] [2022-01-18 17:28:01,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:28:01,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:01,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:28:01,668 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:28:01,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 17:28:01,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:28:01,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:28:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:28:01,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:28:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:01,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:28:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:01,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600446182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:28:01,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:28:01,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:28:01,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140093971] [2022-01-18 17:28:01,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:28:01,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:28:01,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:28:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:28:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:28:01,860 INFO L87 Difference]: Start difference. First operand 7785 states and 29516 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:28:03,024 INFO L93 Difference]: Finished difference Result 16266 states and 56333 transitions. [2022-01-18 17:28:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 17:28:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:28:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:28:03,057 INFO L225 Difference]: With dead ends: 16266 [2022-01-18 17:28:03,058 INFO L226 Difference]: Without dead ends: 16266 [2022-01-18 17:28:03,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1332, Invalid=5474, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:28:03,059 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 409 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:28:03,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 373 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:28:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16266 states. [2022-01-18 17:28:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16266 to 7807. [2022-01-18 17:28:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7807 states, 7806 states have (on average 3.791314373558801) internal successors, (29595), 7806 states have internal predecessors, (29595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7807 states to 7807 states and 29595 transitions. [2022-01-18 17:28:03,255 INFO L78 Accepts]: Start accepts. Automaton has 7807 states and 29595 transitions. Word has length 28 [2022-01-18 17:28:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:28:03,255 INFO L470 AbstractCegarLoop]: Abstraction has 7807 states and 29595 transitions. [2022-01-18 17:28:03,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 7807 states and 29595 transitions. [2022-01-18 17:28:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:28:03,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:28:03,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:28:03,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 17:28:03,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:03,483 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:28:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:28:03,483 INFO L85 PathProgramCache]: Analyzing trace with hash -243640670, now seen corresponding path program 59 times [2022-01-18 17:28:03,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:28:03,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111373449] [2022-01-18 17:28:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:28:03,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:28:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:28:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:03,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:28:03,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111373449] [2022-01-18 17:28:03,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111373449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:28:03,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804896134] [2022-01-18 17:28:03,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:28:03,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:28:03,527 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:28:03,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 17:28:03,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:28:03,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:28:03,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:28:03,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:28:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:03,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:28:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:03,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804896134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:28:03,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:28:03,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:28:03,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936305992] [2022-01-18 17:28:03,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:28:03,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:28:03,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:28:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:28:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:28:03,673 INFO L87 Difference]: Start difference. First operand 7807 states and 29595 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:28:04,684 INFO L93 Difference]: Finished difference Result 17045 states and 58439 transitions. [2022-01-18 17:28:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 17:28:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:28:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:28:04,717 INFO L225 Difference]: With dead ends: 17045 [2022-01-18 17:28:04,717 INFO L226 Difference]: Without dead ends: 17045 [2022-01-18 17:28:04,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1763, Invalid=7167, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 17:28:04,717 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 482 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:28:04,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 388 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:28:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17045 states. [2022-01-18 17:28:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17045 to 7875. [2022-01-18 17:28:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 3.784226568453137) internal successors, (29797), 7874 states have internal predecessors, (29797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 29797 transitions. [2022-01-18 17:28:04,932 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 29797 transitions. Word has length 28 [2022-01-18 17:28:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:28:04,932 INFO L470 AbstractCegarLoop]: Abstraction has 7875 states and 29797 transitions. [2022-01-18 17:28:04,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 29797 transitions. [2022-01-18 17:28:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:28:04,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:28:04,944 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:28:04,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 17:28:05,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:05,149 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:28:05,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:28:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash -475180318, now seen corresponding path program 60 times [2022-01-18 17:28:05,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:28:05,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580601824] [2022-01-18 17:28:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:28:05,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:28:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:28:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:05,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:28:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580601824] [2022-01-18 17:28:05,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580601824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:28:05,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884993550] [2022-01-18 17:28:05,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:28:05,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:05,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:28:05,202 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:28:05,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 17:28:05,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:28:05,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:28:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:28:05,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:28:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:05,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:28:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:05,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884993550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:28:05,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:28:05,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:28:05,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422865108] [2022-01-18 17:28:05,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:28:05,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:28:05,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:28:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:28:05,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:28:05,343 INFO L87 Difference]: Start difference. First operand 7875 states and 29797 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:28:06,410 INFO L93 Difference]: Finished difference Result 16679 states and 57931 transitions. [2022-01-18 17:28:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 17:28:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:28:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:28:06,446 INFO L225 Difference]: With dead ends: 16679 [2022-01-18 17:28:06,446 INFO L226 Difference]: Without dead ends: 16679 [2022-01-18 17:28:06,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2029, Invalid=8683, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 17:28:06,447 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 444 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:28:06,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 349 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:28:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16679 states. [2022-01-18 17:28:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16679 to 8173. [2022-01-18 17:28:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8173 states, 8172 states have (on average 3.7684777288301516) internal successors, (30796), 8172 states have internal predecessors, (30796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8173 states to 8173 states and 30796 transitions. [2022-01-18 17:28:06,663 INFO L78 Accepts]: Start accepts. Automaton has 8173 states and 30796 transitions. Word has length 28 [2022-01-18 17:28:06,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:28:06,663 INFO L470 AbstractCegarLoop]: Abstraction has 8173 states and 30796 transitions. [2022-01-18 17:28:06,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8173 states and 30796 transitions. [2022-01-18 17:28:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:28:06,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:28:06,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:28:06,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 17:28:06,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:06,891 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:28:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:28:06,891 INFO L85 PathProgramCache]: Analyzing trace with hash -87124856, now seen corresponding path program 61 times [2022-01-18 17:28:06,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:28:06,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997295499] [2022-01-18 17:28:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:28:06,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:28:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:28:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:06,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:28:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997295499] [2022-01-18 17:28:06,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997295499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:28:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709038170] [2022-01-18 17:28:06,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:28:06,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:06,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:28:06,936 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:28:06,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 17:28:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:28:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:28:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:28:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:07,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:28:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:07,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709038170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:28:07,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:28:07,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-01-18 17:28:07,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953649108] [2022-01-18 17:28:07,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:28:07,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:28:07,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:28:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:28:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:28:07,061 INFO L87 Difference]: Start difference. First operand 8173 states and 30796 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:28:07,453 INFO L93 Difference]: Finished difference Result 13454 states and 48807 transitions. [2022-01-18 17:28:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:28:07,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 28 [2022-01-18 17:28:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:28:07,482 INFO L225 Difference]: With dead ends: 13454 [2022-01-18 17:28:07,482 INFO L226 Difference]: Without dead ends: 13454 [2022-01-18 17:28:07,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=545, Invalid=1347, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:28:07,524 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 328 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:28:07,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 222 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:28:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13454 states. [2022-01-18 17:28:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13454 to 9274. [2022-01-18 17:28:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.8310147740752725) internal successors, (35525), 9273 states have internal predecessors, (35525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 35525 transitions. [2022-01-18 17:28:07,696 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 35525 transitions. Word has length 28 [2022-01-18 17:28:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:28:07,696 INFO L470 AbstractCegarLoop]: Abstraction has 9274 states and 35525 transitions. [2022-01-18 17:28:07,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 35525 transitions. [2022-01-18 17:28:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:28:07,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:28:07,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:28:07,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 17:28:07,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:07,923 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:28:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:28:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash -520001460, now seen corresponding path program 62 times [2022-01-18 17:28:07,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:28:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558134894] [2022-01-18 17:28:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:28:07,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:28:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:28:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:07,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:28:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558134894] [2022-01-18 17:28:07,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558134894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:28:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575760608] [2022-01-18 17:28:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:28:07,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:28:07,962 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:28:07,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 17:28:07,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:28:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:28:07,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:28:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:28:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:08,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:28:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:28:08,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575760608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:28:08,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:28:08,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:28:08,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359997667] [2022-01-18 17:28:08,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:28:08,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:28:08,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:28:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:28:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:28:08,113 INFO L87 Difference]: Start difference. First operand 9274 states and 35525 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:28:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:28:09,038 INFO L93 Difference]: Finished difference Result 17638 states and 62947 transitions. [2022-01-18 17:28:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 17:28:09,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:28:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:28:09,087 INFO L225 Difference]: With dead ends: 17638 [2022-01-18 17:28:09,087 INFO L226 Difference]: Without dead ends: 17634 [2022-01-18 17:28:09,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2876 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1698, Invalid=6492, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 17:28:09,088 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 518 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:28:09,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 266 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:28:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17634 states. Received shutdown request... [2022-01-18 17:28:09,159 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 17:28:09,164 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:28:09,176 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:28:09,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 17:28:09,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:28:09,375 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-18 17:28:09,376 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 17:28:09,376 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 17:28:09,376 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 17:28:09,379 INFO L732 BasicCegarLoop]: Path program histogram: [90, 62, 1, 1, 1] [2022-01-18 17:28:09,380 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:28:09,380 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:28:09,381 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:28:09 BasicIcfg [2022-01-18 17:28:09,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:28:09,381 INFO L158 Benchmark]: Toolchain (without parser) took 895667.09ms. Allocated memory was 457.2MB in the beginning and 1.5GB in the end (delta: 1.0GB). Free memory was 414.3MB in the beginning and 940.7MB in the end (delta: -526.4MB). Peak memory consumption was 508.1MB. Max. memory is 16.0GB. [2022-01-18 17:28:09,381 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 457.2MB. Free memory is still 415.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:28:09,381 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.49ms. Allocated memory is still 457.2MB. Free memory was 414.3MB in the beginning and 412.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:28:09,381 INFO L158 Benchmark]: Boogie Preprocessor took 19.90ms. Allocated memory is still 457.2MB. Free memory was 412.8MB in the beginning and 411.8MB in the end (delta: 933.2kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:28:09,382 INFO L158 Benchmark]: RCFGBuilder took 174.82ms. Allocated memory is still 457.2MB. Free memory was 411.7MB in the beginning and 402.4MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 17:28:09,382 INFO L158 Benchmark]: TraceAbstraction took 895446.87ms. Allocated memory was 457.2MB in the beginning and 1.5GB in the end (delta: 1.0GB). Free memory was 402.0MB in the beginning and 940.7MB in the end (delta: -538.7MB). Peak memory consumption was 495.6MB. Max. memory is 16.0GB. [2022-01-18 17:28:09,382 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 0.13ms. Allocated memory is still 457.2MB. Free memory is still 415.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 20.49ms. Allocated memory is still 457.2MB. Free memory was 414.3MB in the beginning and 412.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 19.90ms. Allocated memory is still 457.2MB. Free memory was 412.8MB in the beginning and 411.8MB in the end (delta: 933.2kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 174.82ms. Allocated memory is still 457.2MB. Free memory was 411.7MB in the beginning and 402.4MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 895446.87ms. Allocated memory was 457.2MB in the beginning and 1.5GB in the end (delta: 1.0GB). Free memory was 402.0MB in the beginning and 940.7MB in the end (delta: -538.7MB). Peak memory consumption was 495.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - 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 executing MinimizeSevpa. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 895.3s, OverallIterations: 155, TraceHistogramMax: 3, PathProgramHistogramMax: 90, EmptinessCheckTime: 0.9s, AutomataDifference: 505.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64902 SdHoareTripleChecker+Valid, 94.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64902 mSDsluCounter, 55183 SdHoareTripleChecker+Invalid, 80.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 20730 IncrementalHoareTripleChecker+Unchecked, 92811 mSDsCounter, 12860 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 181990 IncrementalHoareTripleChecker+Invalid, 215580 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12860 mSolverCounterUnsat, 4901 mSDtfsCounter, 181990 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18158 GetRequests, 5955 SyntacticMatches, 362 SemanticMatches, 11841 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 464756 ImplicationChecksByTransitivity, 442.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9274occurred in iteration=154, InterpolantAutomatonStates: 10191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 14.0s AutomataMinimizationTime, 155 MinimizatonAttempts, 545498 StatesRemovedByMinimization, 154 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 336.6s InterpolantComputationTime, 7918 NumberOfCodeBlocks, 7912 NumberOfCodeBlocksAsserted, 507 NumberOfCheckSat, 11389 ConstructedInterpolants, 217 QuantifiedInterpolants, 226554 SizeOfPredicates, 1581 NumberOfNonLiveVariables, 9958 ConjunctsInSsa, 2718 ConjunctsInUnsatCore, 459 InterpolantComputations, 3 PerfectInterpolantSequences, 537/3149 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