/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:21:28,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:21:28,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:21:28,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 06:21:28,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 06:21:28,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 06:21:28,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 06:21:28,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 06:21:28,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:21:28,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:21:28,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:21:28,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:21:28,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:21:28,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:21:28,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:21:28,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:21:28,159 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:21:28,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:21:28,160 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:21:28,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:21:28,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:21:28,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:21:28,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:21:28,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:21:28,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:21:28,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:21:28,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:21:28,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:21:28,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:21:28,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:21:28,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:21:28,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:21:28,168 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:21:28,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:21:28,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:21:28,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:21:28,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:21:28,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:21:28,421 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:21:28,422 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:21:28,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2022-01-18 06:21:28,424 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2022-01-18 06:21:28,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:21:28,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:21:28,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:21:28,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:21:28,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:21:28,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,482 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:21:28,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:21:28,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:21:28,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:21:28,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:21:28,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:21:28,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:21:28,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:21:28,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:21:28,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/1) ... [2022-01-18 06:21:28,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:21:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:28,528 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 06:21:28,546 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 06:21:28,560 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:21:28,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:21:28,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:21:28,560 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:21:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:21:28,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:21:28,561 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:21:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:21:28,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:21:28,561 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:21:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:21:28,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:21:28,562 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 06:21:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 06:21:28,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 06:21:28,562 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 06:21:28,599 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:21:28,600 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:21:28,729 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:21:28,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:21:28,745 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:21:28,746 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:21:28 BoogieIcfgContainer [2022-01-18 06:21:28,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:21:28,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:21:28,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:21:28,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:21:28,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:21:28" (1/2) ... [2022-01-18 06:21:28,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12efd787 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:21:28, skipping insertion in model container [2022-01-18 06:21:28,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:21:28" (2/2) ... [2022-01-18 06:21:28,760 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2022-01-18 06:21:28,764 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:21:28,764 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:21:28,764 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:21:28,764 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:21:28,837 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 06:21:28,883 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:21:28,889 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 06:21:28,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 06:21:28,897 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-01-18 06:21:28,996 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 06:21:29,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:29,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:29,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -315677691, now seen corresponding path program 1 times [2022-01-18 06:21:29,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:29,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502208438] [2022-01-18 06:21:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:29,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:29,154 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 06:21:29,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:29,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502208438] [2022-01-18 06:21:29,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502208438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:21:29,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:21:29,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:21:29,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823786191] [2022-01-18 06:21:29,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:21:29,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:21:29,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:21:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:21:29,197 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:29,310 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2022-01-18 06:21:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:21:29,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 06:21:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:29,329 INFO L225 Difference]: With dead ends: 691 [2022-01-18 06:21:29,329 INFO L226 Difference]: Without dead ends: 691 [2022-01-18 06:21:29,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:21:29,334 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:29,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:21:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-18 06:21:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2022-01-18 06:21:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2022-01-18 06:21:29,478 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2022-01-18 06:21:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:29,478 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2022-01-18 06:21:29,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2022-01-18 06:21:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:21:29,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:29,481 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 06:21:29,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:21:29,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1754302367, now seen corresponding path program 1 times [2022-01-18 06:21:29,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075779349] [2022-01-18 06:21:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:29,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:29,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:29,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075779349] [2022-01-18 06:21:29,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075779349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:29,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801633653] [2022-01-18 06:21:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:29,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:29,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:29,529 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 06:21:29,530 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 06:21:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 06:21:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:29,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 06:21:29,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801633653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:21:29,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 06:21:29,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-01-18 06:21:29,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894673747] [2022-01-18 06:21:29,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:21:29,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:21:29,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:21:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:21:29,717 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:29,765 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2022-01-18 06:21:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:21:29,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:21:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:29,776 INFO L225 Difference]: With dead ends: 1250 [2022-01-18 06:21:29,776 INFO L226 Difference]: Without dead ends: 1250 [2022-01-18 06:21:29,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 06:21:29,778 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:29,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:21:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-01-18 06:21:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2022-01-18 06:21:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2022-01-18 06:21:29,848 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2022-01-18 06:21:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:29,851 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2022-01-18 06:21:29,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2022-01-18 06:21:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:21:29,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:29,855 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 06:21:29,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 06:21:30,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:30,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:30,074 INFO L85 PathProgramCache]: Analyzing trace with hash 971971041, now seen corresponding path program 1 times [2022-01-18 06:21:30,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:30,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028774983] [2022-01-18 06:21:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:30,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:30,161 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 06:21:30,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028774983] [2022-01-18 06:21:30,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028774983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146401854] [2022-01-18 06:21:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:30,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:30,163 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 06:21:30,165 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 06:21:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 06:21:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:30,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 06:21:30,418 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 06:21:30,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:30,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:30,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 06:21:30,567 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 06:21:30,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146401854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:30,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:30,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-01-18 06:21:30,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509406968] [2022-01-18 06:21:30,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:30,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:21:30,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:21:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:21:30,572 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:30,683 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2022-01-18 06:21:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:21:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:21:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:30,698 INFO L225 Difference]: With dead ends: 1934 [2022-01-18 06:21:30,698 INFO L226 Difference]: Without dead ends: 1807 [2022-01-18 06:21:30,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:21:30,700 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:30,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 127 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:21:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-01-18 06:21:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2022-01-18 06:21:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2022-01-18 06:21:30,750 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2022-01-18 06:21:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:30,750 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2022-01-18 06:21:30,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2022-01-18 06:21:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:21:30,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:30,755 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 06:21:30,778 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 06:21:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-18 06:21:30,964 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 770843555, now seen corresponding path program 2 times [2022-01-18 06:21:30,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:30,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190154290] [2022-01-18 06:21:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:30,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:31,022 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 06:21:31,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190154290] [2022-01-18 06:21:31,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190154290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941568331] [2022-01-18 06:21:31,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:21:31,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:31,025 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 06:21:31,030 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 06:21:31,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:21:31,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 06:21:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:31,125 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 06:21:31,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:31,180 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 06:21:31,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941568331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:31,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:31,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-01-18 06:21:31,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215413724] [2022-01-18 06:21:31,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:31,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:21:31,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:21:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:21:31,182 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 06:21:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:31,319 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2022-01-18 06:21:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 06:21:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:21:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:31,337 INFO L225 Difference]: With dead ends: 2404 [2022-01-18 06:21:31,337 INFO L226 Difference]: Without dead ends: 2234 [2022-01-18 06:21:31,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:21:31,338 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:31,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:21:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-01-18 06:21:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2022-01-18 06:21:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2022-01-18 06:21:31,421 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2022-01-18 06:21:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:31,421 INFO L470 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2022-01-18 06:21:31,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 06:21:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2022-01-18 06:21:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:21:31,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:31,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:31,456 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 06:21:31,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:31,651 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1128294111, now seen corresponding path program 1 times [2022-01-18 06:21:31,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326524048] [2022-01-18 06:21:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:31,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:31,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:31,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326524048] [2022-01-18 06:21:31,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326524048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:21:31,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:21:31,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:21:31,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665673618] [2022-01-18 06:21:31,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:21:31,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:21:31,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:31,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:21:31,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:21:31,724 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:31,795 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2022-01-18 06:21:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:21:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:21:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:31,852 INFO L225 Difference]: With dead ends: 3426 [2022-01-18 06:21:31,852 INFO L226 Difference]: Without dead ends: 3255 [2022-01-18 06:21:31,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:21:31,853 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:31,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:21:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-01-18 06:21:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2022-01-18 06:21:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2022-01-18 06:21:31,954 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2022-01-18 06:21:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:31,954 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2022-01-18 06:21:31,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2022-01-18 06:21:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:21:31,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:31,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:31,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 06:21:31,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash -448766263, now seen corresponding path program 3 times [2022-01-18 06:21:31,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:31,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80832738] [2022-01-18 06:21:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:31,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:32,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80832738] [2022-01-18 06:21:32,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80832738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205087553] [2022-01-18 06:21:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:21:32,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:32,087 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 06:21:32,088 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 06:21:32,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:21:32,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 06:21:32,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:32,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:32,349 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 26 treesize of output 32 [2022-01-18 06:21:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:32,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:32,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:21:32,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:21:32,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:32,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:32,765 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 25 treesize of output 31 [2022-01-18 06:21:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:32,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205087553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:32,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:32,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-01-18 06:21:32,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406908640] [2022-01-18 06:21:32,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:32,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:21:32,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:21:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:21:32,901 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:33,338 INFO L93 Difference]: Finished difference Result 7428 states and 28812 transitions. [2022-01-18 06:21:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:21:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:21:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:33,380 INFO L225 Difference]: With dead ends: 7428 [2022-01-18 06:21:33,380 INFO L226 Difference]: Without dead ends: 7208 [2022-01-18 06:21:33,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:21:33,381 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 410 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:33,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 711 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 312 Invalid, 0 Unknown, 199 Unchecked, 0.2s Time] [2022-01-18 06:21:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2022-01-18 06:21:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 4181. [2022-01-18 06:21:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 4180 states have (on average 3.95933014354067) internal successors, (16550), 4180 states have internal predecessors, (16550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 16550 transitions. [2022-01-18 06:21:33,609 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 16550 transitions. Word has length 29 [2022-01-18 06:21:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:33,609 INFO L470 AbstractCegarLoop]: Abstraction has 4181 states and 16550 transitions. [2022-01-18 06:21:33,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 16550 transitions. [2022-01-18 06:21:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:21:33,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:33,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:33,650 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 06:21:33,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:33,847 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1095707459, now seen corresponding path program 4 times [2022-01-18 06:21:33,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686870672] [2022-01-18 06:21:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:33,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:33,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686870672] [2022-01-18 06:21:33,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686870672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329010391] [2022-01-18 06:21:33,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:21:33,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:33,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:33,959 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 06:21:33,962 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 06:21:33,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:21:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 06:21:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:34,165 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:21:34,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-01-18 06:21:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:34,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:34,341 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:21:34,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 50 [2022-01-18 06:21:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:34,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329010391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:34,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:34,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 06:21:34,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349865134] [2022-01-18 06:21:34,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:34,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:21:34,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:34,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:21:34,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:21:34,490 INFO L87 Difference]: Start difference. First operand 4181 states and 16550 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 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 06:21:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:35,011 INFO L93 Difference]: Finished difference Result 10023 states and 38688 transitions. [2022-01-18 06:21:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:21:35,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 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 29 [2022-01-18 06:21:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:35,052 INFO L225 Difference]: With dead ends: 10023 [2022-01-18 06:21:35,053 INFO L226 Difference]: Without dead ends: 9344 [2022-01-18 06:21:35,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:21:35,054 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 309 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:35,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 490 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:21:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2022-01-18 06:21:35,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 4644. [2022-01-18 06:21:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 4.0200301529183715) internal successors, (18665), 4643 states have internal predecessors, (18665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 18665 transitions. [2022-01-18 06:21:35,288 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 18665 transitions. Word has length 29 [2022-01-18 06:21:35,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:35,288 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 18665 transitions. [2022-01-18 06:21:35,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 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 06:21:35,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 18665 transitions. [2022-01-18 06:21:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:21:35,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:35,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:35,326 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 06:21:35,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:35,517 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash 662589228, now seen corresponding path program 1 times [2022-01-18 06:21:35,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:35,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728199243] [2022-01-18 06:21:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:35,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 06:21:35,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:35,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728199243] [2022-01-18 06:21:35,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728199243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:21:35,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:21:35,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:21:35,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008281633] [2022-01-18 06:21:35,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:21:35,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:21:35,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:21:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:21:35,545 INFO L87 Difference]: Start difference. First operand 4644 states and 18665 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:35,594 INFO L93 Difference]: Finished difference Result 4644 states and 18215 transitions. [2022-01-18 06:21:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:21:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 06:21:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:35,615 INFO L225 Difference]: With dead ends: 4644 [2022-01-18 06:21:35,615 INFO L226 Difference]: Without dead ends: 4644 [2022-01-18 06:21:35,616 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 06:21:35,616 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:35,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:21:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2022-01-18 06:21:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 4644. [2022-01-18 06:21:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4643 states have (on average 3.923110058152057) internal successors, (18215), 4643 states have internal predecessors, (18215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 18215 transitions. [2022-01-18 06:21:35,732 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 18215 transitions. Word has length 29 [2022-01-18 06:21:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:35,732 INFO L470 AbstractCegarLoop]: Abstraction has 4644 states and 18215 transitions. [2022-01-18 06:21:35,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 18215 transitions. [2022-01-18 06:21:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:21:35,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:35,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:35,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 06:21:35,748 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2075774616, now seen corresponding path program 2 times [2022-01-18 06:21:35,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168563449] [2022-01-18 06:21:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:35,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:35,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168563449] [2022-01-18 06:21:35,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168563449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172452860] [2022-01-18 06:21:35,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:21:35,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:35,789 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 06:21:35,817 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 06:21:35,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:21:35,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:21:35,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:35,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:35,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172452860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:35,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:35,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-01-18 06:21:35,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572235133] [2022-01-18 06:21:35,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:35,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:21:35,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:21:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:21:35,999 INFO L87 Difference]: Start difference. First operand 4644 states and 18215 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 06:21:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:36,366 INFO L93 Difference]: Finished difference Result 11633 states and 43852 transitions. [2022-01-18 06:21:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:21:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-01-18 06:21:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:36,448 INFO L225 Difference]: With dead ends: 11633 [2022-01-18 06:21:36,449 INFO L226 Difference]: Without dead ends: 11535 [2022-01-18 06:21:36,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:21:36,451 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 298 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:36,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 67 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:21:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11535 states. [2022-01-18 06:21:36,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11535 to 5310. [2022-01-18 06:21:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5309 states have (on average 4.09154266340177) internal successors, (21722), 5309 states have internal predecessors, (21722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 21722 transitions. [2022-01-18 06:21:36,635 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 21722 transitions. Word has length 29 [2022-01-18 06:21:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 5310 states and 21722 transitions. [2022-01-18 06:21:36,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 06:21:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 21722 transitions. [2022-01-18 06:21:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 06:21:36,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:36,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:36,679 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 06:21:36,875 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 06:21:36,876 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash 757337576, now seen corresponding path program 3 times [2022-01-18 06:21:36,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:36,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911003804] [2022-01-18 06:21:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:36,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:36,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:36,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911003804] [2022-01-18 06:21:36,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911003804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:36,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998169558] [2022-01-18 06:21:36,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:21:36,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:36,912 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 06:21:36,913 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 06:21:36,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:21:36,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:21:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:37,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:21:37,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998169558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:37,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:37,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-01-18 06:21:37,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255085201] [2022-01-18 06:21:37,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:37,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:21:37,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:21:37,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:21:37,148 INFO L87 Difference]: Start difference. First operand 5310 states and 21722 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 06:21:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:37,631 INFO L93 Difference]: Finished difference Result 13188 states and 49597 transitions. [2022-01-18 06:21:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:21:37,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-01-18 06:21:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:37,685 INFO L225 Difference]: With dead ends: 13188 [2022-01-18 06:21:37,685 INFO L226 Difference]: Without dead ends: 13188 [2022-01-18 06:21:37,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:21:37,686 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 228 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:37,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 131 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:21:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13188 states. [2022-01-18 06:21:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13188 to 5511. [2022-01-18 06:21:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 4.044101633393829) internal successors, (22283), 5510 states have internal predecessors, (22283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 22283 transitions. [2022-01-18 06:21:37,996 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 22283 transitions. Word has length 29 [2022-01-18 06:21:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:37,996 INFO L470 AbstractCegarLoop]: Abstraction has 5511 states and 22283 transitions. [2022-01-18 06:21:37,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 06:21:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 22283 transitions. [2022-01-18 06:21:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 06:21:38,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:38,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:38,037 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 06:21:38,235 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 06:21:38,235 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1984386215, now seen corresponding path program 5 times [2022-01-18 06:21:38,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647055601] [2022-01-18 06:21:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:38,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:38,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:38,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647055601] [2022-01-18 06:21:38,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647055601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:38,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627047457] [2022-01-18 06:21:38,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:21:38,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:38,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:38,327 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 06:21:38,328 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 06:21:38,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:21:38,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:21:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:38,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:38,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627047457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:38,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:38,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-01-18 06:21:38,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858783300] [2022-01-18 06:21:38,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:38,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:21:38,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:21:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:21:38,477 INFO L87 Difference]: Start difference. First operand 5511 states and 22283 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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 06:21:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:38,632 INFO L93 Difference]: Finished difference Result 9064 states and 35970 transitions. [2022-01-18 06:21:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:21:38,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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 31 [2022-01-18 06:21:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:38,663 INFO L225 Difference]: With dead ends: 9064 [2022-01-18 06:21:38,663 INFO L226 Difference]: Without dead ends: 8701 [2022-01-18 06:21:38,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:21:38,664 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:38,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 149 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:21:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8701 states. [2022-01-18 06:21:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8701 to 7382. [2022-01-18 06:21:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 4.085083322043084) internal successors, (30152), 7381 states have internal predecessors, (30152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 30152 transitions. [2022-01-18 06:21:38,891 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 30152 transitions. Word has length 31 [2022-01-18 06:21:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:38,892 INFO L470 AbstractCegarLoop]: Abstraction has 7382 states and 30152 transitions. [2022-01-18 06:21:38,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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 06:21:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 30152 transitions. [2022-01-18 06:21:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:21:38,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:38,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:38,935 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 06:21:39,135 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 06:21:39,136 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash -48538494, now seen corresponding path program 4 times [2022-01-18 06:21:39,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:39,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400717273] [2022-01-18 06:21:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:39,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:39,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:39,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400717273] [2022-01-18 06:21:39,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400717273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:39,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292407258] [2022-01-18 06:21:39,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:21:39,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:39,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:39,169 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 06:21:39,173 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 06:21:39,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:21:39,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:21:39,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:39,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:21:39,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292407258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:39,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:39,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-01-18 06:21:39,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030439199] [2022-01-18 06:21:39,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:39,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:21:39,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:21:39,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:21:39,316 INFO L87 Difference]: Start difference. First operand 7382 states and 30152 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:39,491 INFO L93 Difference]: Finished difference Result 8841 states and 35463 transitions. [2022-01-18 06:21:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:21:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:21:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:39,524 INFO L225 Difference]: With dead ends: 8841 [2022-01-18 06:21:39,524 INFO L226 Difference]: Without dead ends: 8841 [2022-01-18 06:21:39,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:21:39,525 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:39,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 94 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:21:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8841 states. [2022-01-18 06:21:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8841 to 6146. [2022-01-18 06:21:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6145 states have (on average 3.9656631407648493) internal successors, (24369), 6145 states have internal predecessors, (24369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 24369 transitions. [2022-01-18 06:21:39,693 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 24369 transitions. Word has length 32 [2022-01-18 06:21:39,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:39,693 INFO L470 AbstractCegarLoop]: Abstraction has 6146 states and 24369 transitions. [2022-01-18 06:21:39,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 24369 transitions. [2022-01-18 06:21:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:21:39,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:39,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:39,733 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 06:21:39,923 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 06:21:39,923 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:39,924 INFO L85 PathProgramCache]: Analyzing trace with hash -499344603, now seen corresponding path program 6 times [2022-01-18 06:21:39,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:39,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681025078] [2022-01-18 06:21:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:39,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:40,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681025078] [2022-01-18 06:21:40,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681025078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:40,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922354577] [2022-01-18 06:21:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:21:40,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:40,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:40,052 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 06:21:40,078 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 06:21:40,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:21:40,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:40,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:21:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:40,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:40,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:40,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:40,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 86 [2022-01-18 06:21:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:40,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:21:41,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:21:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:41,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:41,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 64 [2022-01-18 06:21:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:41,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922354577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:41,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:41,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-01-18 06:21:41,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333368480] [2022-01-18 06:21:41,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:41,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:21:41,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:21:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:21:41,405 INFO L87 Difference]: Start difference. First operand 6146 states and 24369 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:42,683 INFO L93 Difference]: Finished difference Result 25936 states and 104806 transitions. [2022-01-18 06:21:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:21:42,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:21:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:42,771 INFO L225 Difference]: With dead ends: 25936 [2022-01-18 06:21:42,771 INFO L226 Difference]: Without dead ends: 25312 [2022-01-18 06:21:42,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:21:42,773 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 786 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:42,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1865 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 585 Invalid, 0 Unknown, 707 Unchecked, 0.3s Time] [2022-01-18 06:21:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25312 states. [2022-01-18 06:21:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25312 to 9990. [2022-01-18 06:21:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9990 states, 9989 states have (on average 4.0841926118730605) internal successors, (40797), 9989 states have internal predecessors, (40797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9990 states to 9990 states and 40797 transitions. [2022-01-18 06:21:43,182 INFO L78 Accepts]: Start accepts. Automaton has 9990 states and 40797 transitions. Word has length 34 [2022-01-18 06:21:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:43,183 INFO L470 AbstractCegarLoop]: Abstraction has 9990 states and 40797 transitions. [2022-01-18 06:21:43,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 9990 states and 40797 transitions. [2022-01-18 06:21:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:21:43,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:43,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:43,217 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 06:21:43,402 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 06:21:43,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash 243147073, now seen corresponding path program 7 times [2022-01-18 06:21:43,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:43,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770352416] [2022-01-18 06:21:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:43,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:43,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770352416] [2022-01-18 06:21:43,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770352416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657779381] [2022-01-18 06:21:43,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:21:43,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:43,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:43,567 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 06:21:43,568 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 06:21:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:21:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:43,912 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:21:43,912 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2022-01-18 06:21:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:43,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:44,156 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:21:44,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 103 [2022-01-18 06:21:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:21:44,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657779381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:44,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:44,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-18 06:21:44,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985133553] [2022-01-18 06:21:44,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:44,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:21:44,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:21:44,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:21:44,707 INFO L87 Difference]: Start difference. First operand 9990 states and 40797 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:45,503 INFO L93 Difference]: Finished difference Result 16771 states and 67781 transitions. [2022-01-18 06:21:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 06:21:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:21:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:45,549 INFO L225 Difference]: With dead ends: 16771 [2022-01-18 06:21:45,549 INFO L226 Difference]: Without dead ends: 16611 [2022-01-18 06:21:45,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:21:45,550 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 272 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:45,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1667 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:21:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16611 states. [2022-01-18 06:21:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16611 to 9615. [2022-01-18 06:21:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9615 states, 9614 states have (on average 4.095277719991679) internal successors, (39372), 9614 states have internal predecessors, (39372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9615 states to 9615 states and 39372 transitions. [2022-01-18 06:21:45,832 INFO L78 Accepts]: Start accepts. Automaton has 9615 states and 39372 transitions. Word has length 34 [2022-01-18 06:21:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:45,832 INFO L470 AbstractCegarLoop]: Abstraction has 9615 states and 39372 transitions. [2022-01-18 06:21:45,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9615 states and 39372 transitions. [2022-01-18 06:21:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:21:45,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:45,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:45,867 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 06:21:46,051 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 06:21:46,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1420071612, now seen corresponding path program 5 times [2022-01-18 06:21:46,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:46,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190708830] [2022-01-18 06:21:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:46,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:46,156 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 06:21:46,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:46,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190708830] [2022-01-18 06:21:46,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190708830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:46,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963428618] [2022-01-18 06:21:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:21:46,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:46,157 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 06:21:46,158 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 06:21:46,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:21:46,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:21:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:46,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:46,459 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2022-01-18 06:21:46,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 06:21:46,665 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 06:21:46,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:46,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:46,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:21:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:47,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:47,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 06:21:47,340 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 06:21:47,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963428618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:47,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:47,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 06:21:47,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545130175] [2022-01-18 06:21:47,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:47,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:21:47,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:21:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:21:47,342 INFO L87 Difference]: Start difference. First operand 9615 states and 39372 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:48,454 INFO L93 Difference]: Finished difference Result 30774 states and 123173 transitions. [2022-01-18 06:21:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:21:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:21:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:48,569 INFO L225 Difference]: With dead ends: 30774 [2022-01-18 06:21:48,569 INFO L226 Difference]: Without dead ends: 30699 [2022-01-18 06:21:48,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:21:48,570 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 566 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1095 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:48,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1553 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 927 Invalid, 0 Unknown, 1095 Unchecked, 0.4s Time] [2022-01-18 06:21:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30699 states. [2022-01-18 06:21:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30699 to 12717. [2022-01-18 06:21:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12717 states, 12716 states have (on average 4.13903743315508) internal successors, (52632), 12716 states have internal predecessors, (52632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12717 states to 12717 states and 52632 transitions. [2022-01-18 06:21:49,158 INFO L78 Accepts]: Start accepts. Automaton has 12717 states and 52632 transitions. Word has length 34 [2022-01-18 06:21:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:49,158 INFO L470 AbstractCegarLoop]: Abstraction has 12717 states and 52632 transitions. [2022-01-18 06:21:49,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 12717 states and 52632 transitions. [2022-01-18 06:21:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:21:49,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:49,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:49,271 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 06:21:49,455 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 06:21:49,456 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1441575100, now seen corresponding path program 6 times [2022-01-18 06:21:49,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:49,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329733440] [2022-01-18 06:21:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:49,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:49,560 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 06:21:49,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:49,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329733440] [2022-01-18 06:21:49,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329733440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:49,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854980301] [2022-01-18 06:21:49,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:21:49,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:49,562 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 06:21:49,563 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 06:21:49,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:21:49,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:49,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:21:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:49,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:49,869 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2022-01-18 06:21:50,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 06:21:50,078 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 06:21:50,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:50,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:50,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:21:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:50,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:50,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 06:21:50,777 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 06:21:50,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854980301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:50,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:50,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 06:21:50,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124640475] [2022-01-18 06:21:50,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:50,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:21:50,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:21:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:21:50,779 INFO L87 Difference]: Start difference. First operand 12717 states and 52632 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:52,288 INFO L93 Difference]: Finished difference Result 38760 states and 154787 transitions. [2022-01-18 06:21:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:21:52,289 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:21:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:52,435 INFO L225 Difference]: With dead ends: 38760 [2022-01-18 06:21:52,435 INFO L226 Difference]: Without dead ends: 38685 [2022-01-18 06:21:52,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=1639, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:21:52,436 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 549 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:52,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1857 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1232 Invalid, 0 Unknown, 1105 Unchecked, 0.6s Time] [2022-01-18 06:21:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38685 states. [2022-01-18 06:21:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38685 to 15645. [2022-01-18 06:21:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15645 states, 15644 states have (on average 4.1591025313219125) internal successors, (65065), 15644 states have internal predecessors, (65065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15645 states to 15645 states and 65065 transitions. [2022-01-18 06:21:53,045 INFO L78 Accepts]: Start accepts. Automaton has 15645 states and 65065 transitions. Word has length 34 [2022-01-18 06:21:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:53,046 INFO L470 AbstractCegarLoop]: Abstraction has 15645 states and 65065 transitions. [2022-01-18 06:21:53,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 15645 states and 65065 transitions. [2022-01-18 06:21:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:21:53,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:53,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:53,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 06:21:53,282 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 06:21:53,282 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash -713739942, now seen corresponding path program 7 times [2022-01-18 06:21:53,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:53,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015788732] [2022-01-18 06:21:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:53,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:53,393 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 06:21:53,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015788732] [2022-01-18 06:21:53,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015788732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191196724] [2022-01-18 06:21:53,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:21:53,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:53,395 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 06:21:53,396 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 06:21:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:53,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:21:53,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:53,719 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:21:53,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-01-18 06:21:53,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 06:21:53,790 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 06:21:53,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:53,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:53,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:21:53,968 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:21:53,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:21:54,086 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 06:21:54,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191196724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:54,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:54,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:21:54,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688238675] [2022-01-18 06:21:54,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:54,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:21:54,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:21:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:21:54,087 INFO L87 Difference]: Start difference. First operand 15645 states and 65065 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:54,794 INFO L93 Difference]: Finished difference Result 32084 states and 130117 transitions. [2022-01-18 06:21:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:21:54,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:21:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:55,022 INFO L225 Difference]: With dead ends: 32084 [2022-01-18 06:21:55,022 INFO L226 Difference]: Without dead ends: 32081 [2022-01-18 06:21:55,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:21:55,024 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 248 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:55,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 636 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:21:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32081 states. [2022-01-18 06:21:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32081 to 15169. [2022-01-18 06:21:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15169 states, 15168 states have (on average 4.165414029535865) internal successors, (63181), 15168 states have internal predecessors, (63181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15169 states to 15169 states and 63181 transitions. [2022-01-18 06:21:55,551 INFO L78 Accepts]: Start accepts. Automaton has 15169 states and 63181 transitions. Word has length 34 [2022-01-18 06:21:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:55,551 INFO L470 AbstractCegarLoop]: Abstraction has 15169 states and 63181 transitions. [2022-01-18 06:21:55,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 15169 states and 63181 transitions. [2022-01-18 06:21:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:21:55,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:55,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:55,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-18 06:21:55,793 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 06:21:55,793 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2086034530, now seen corresponding path program 8 times [2022-01-18 06:21:55,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:55,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903633602] [2022-01-18 06:21:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:55,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:55,886 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 06:21:55,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:55,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903633602] [2022-01-18 06:21:55,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903633602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:55,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751589431] [2022-01-18 06:21:55,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:21:55,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:55,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:55,888 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 06:21:55,911 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 06:21:55,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:21:55,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:55,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:21:55,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:56,255 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 32 treesize of output 26 [2022-01-18 06:21:56,284 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:21:56,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:21:56,312 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 06:21:56,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:56,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:56,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:21:56,508 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:21:56,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:21:56,674 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 06:21:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751589431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:56,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:56,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:21:56,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119704674] [2022-01-18 06:21:56,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:56,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:21:56,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:21:56,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:21:56,676 INFO L87 Difference]: Start difference. First operand 15169 states and 63181 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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 06:21:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:21:57,654 INFO L93 Difference]: Finished difference Result 31363 states and 127354 transitions. [2022-01-18 06:21:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:21:57,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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 34 [2022-01-18 06:21:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:21:57,757 INFO L225 Difference]: With dead ends: 31363 [2022-01-18 06:21:57,757 INFO L226 Difference]: Without dead ends: 31208 [2022-01-18 06:21:57,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:21:57,757 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 213 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:21:57,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 794 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:21:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31208 states. [2022-01-18 06:21:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31208 to 15479. [2022-01-18 06:21:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15479 states, 15478 states have (on average 4.165460653831245) internal successors, (64473), 15478 states have internal predecessors, (64473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:21:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15479 states to 15479 states and 64473 transitions. [2022-01-18 06:21:58,320 INFO L78 Accepts]: Start accepts. Automaton has 15479 states and 64473 transitions. Word has length 34 [2022-01-18 06:21:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:21:58,321 INFO L470 AbstractCegarLoop]: Abstraction has 15479 states and 64473 transitions. [2022-01-18 06:21:58,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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 06:21:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 15479 states and 64473 transitions. [2022-01-18 06:21:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:21:58,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:21:58,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:21:58,383 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 06:21:58,579 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 06:21:58,580 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:21:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:21:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash -125437602, now seen corresponding path program 9 times [2022-01-18 06:21:58,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:21:58,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207807731] [2022-01-18 06:21:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:21:58,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:21:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:21:58,677 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 06:21:58,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:21:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207807731] [2022-01-18 06:21:58,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207807731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:21:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156511358] [2022-01-18 06:21:58,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:21:58,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:21:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:21:58,679 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 06:21:58,717 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 06:21:58,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:21:58,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:21:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:21:58,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:21:59,018 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 28 treesize of output 22 [2022-01-18 06:21:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:59,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:59,084 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 37 treesize of output 37 [2022-01-18 06:21:59,168 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 06:21:59,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:21:59,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:59,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:21:59,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:21:59,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:21:59,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:21:59,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:21:59,714 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2022-01-18 06:21:59,824 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 06:21:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156511358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:21:59,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:21:59,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-18 06:21:59,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406047355] [2022-01-18 06:21:59,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:21:59,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:21:59,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:21:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:21:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:21:59,825 INFO L87 Difference]: Start difference. First operand 15479 states and 64473 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:02,153 INFO L93 Difference]: Finished difference Result 54106 states and 217691 transitions. [2022-01-18 06:22:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:22:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:02,339 INFO L225 Difference]: With dead ends: 54106 [2022-01-18 06:22:02,339 INFO L226 Difference]: Without dead ends: 53823 [2022-01-18 06:22:02,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=831, Invalid=3591, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:22:02,341 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1298 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1218 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:02,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 1400 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 614 Invalid, 0 Unknown, 1218 Unchecked, 0.3s Time] [2022-01-18 06:22:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53823 states. [2022-01-18 06:22:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53823 to 19142. [2022-01-18 06:22:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19142 states, 19141 states have (on average 4.184368632777807) internal successors, (80093), 19141 states have internal predecessors, (80093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19142 states to 19142 states and 80093 transitions. [2022-01-18 06:22:03,335 INFO L78 Accepts]: Start accepts. Automaton has 19142 states and 80093 transitions. Word has length 34 [2022-01-18 06:22:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:03,335 INFO L470 AbstractCegarLoop]: Abstraction has 19142 states and 80093 transitions. [2022-01-18 06:22:03,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 19142 states and 80093 transitions. [2022-01-18 06:22:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:03,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:03,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:03,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:22:03,570 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 06:22:03,570 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2074432168, now seen corresponding path program 10 times [2022-01-18 06:22:03,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:03,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113244370] [2022-01-18 06:22:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:03,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:03,656 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 06:22:03,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:03,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113244370] [2022-01-18 06:22:03,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113244370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:03,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56878170] [2022-01-18 06:22:03,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:22:03,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:03,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:03,658 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 06:22:03,660 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 06:22:03,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:22:03,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:03,886 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:03,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-01-18 06:22:03,961 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 26 treesize of output 20 [2022-01-18 06:22:03,983 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 06:22:03,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:04,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:04,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 06:22:04,215 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:04,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:22:04,400 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 06:22:04,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56878170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:04,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:04,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:22:04,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452469001] [2022-01-18 06:22:04,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:04,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:22:04,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:22:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:22:04,402 INFO L87 Difference]: Start difference. First operand 19142 states and 80093 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:05,484 INFO L93 Difference]: Finished difference Result 40329 states and 163141 transitions. [2022-01-18 06:22:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:22:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:05,742 INFO L225 Difference]: With dead ends: 40329 [2022-01-18 06:22:05,742 INFO L226 Difference]: Without dead ends: 40254 [2022-01-18 06:22:05,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:22:05,744 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 315 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:05,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1045 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:22:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40254 states. [2022-01-18 06:22:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40254 to 19256. [2022-01-18 06:22:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19256 states, 19255 states have (on average 4.183484809140483) internal successors, (80553), 19255 states have internal predecessors, (80553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19256 states to 19256 states and 80553 transitions. [2022-01-18 06:22:06,384 INFO L78 Accepts]: Start accepts. Automaton has 19256 states and 80553 transitions. Word has length 34 [2022-01-18 06:22:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:06,384 INFO L470 AbstractCegarLoop]: Abstraction has 19256 states and 80553 transitions. [2022-01-18 06:22:06,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 19256 states and 80553 transitions. [2022-01-18 06:22:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:06,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:06,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:06,436 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 06:22:06,621 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 06:22:06,622 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash 779753696, now seen corresponding path program 11 times [2022-01-18 06:22:06,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:06,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273366911] [2022-01-18 06:22:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:06,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:06,708 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 06:22:06,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:06,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273366911] [2022-01-18 06:22:06,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273366911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:06,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212326158] [2022-01-18 06:22:06,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:22:06,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:06,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:06,710 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 06:22:06,710 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 06:22:06,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:22:06,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:22:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:07,011 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 21 treesize of output 17 [2022-01-18 06:22:07,060 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 06:22:07,063 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 32 [2022-01-18 06:22:07,146 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 06:22:07,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:07,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:07,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 06:22:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:07,945 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 06:22:07,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 37 [2022-01-18 06:22:07,980 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 06:22:07,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212326158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:07,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:07,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-01-18 06:22:07,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903278471] [2022-01-18 06:22:07,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:07,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:22:07,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:22:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:22:07,981 INFO L87 Difference]: Start difference. First operand 19256 states and 80553 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:08,784 INFO L93 Difference]: Finished difference Result 31755 states and 129912 transitions. [2022-01-18 06:22:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 06:22:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:08,958 INFO L225 Difference]: With dead ends: 31755 [2022-01-18 06:22:08,958 INFO L226 Difference]: Without dead ends: 31716 [2022-01-18 06:22:08,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:22:08,959 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 394 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:08,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 764 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 278 Invalid, 0 Unknown, 520 Unchecked, 0.1s Time] [2022-01-18 06:22:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31716 states. [2022-01-18 06:22:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31716 to 20660. [2022-01-18 06:22:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20660 states, 20659 states have (on average 4.182051406166804) internal successors, (86397), 20659 states have internal predecessors, (86397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 86397 transitions. [2022-01-18 06:22:09,789 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 86397 transitions. Word has length 34 [2022-01-18 06:22:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:09,790 INFO L470 AbstractCegarLoop]: Abstraction has 20660 states and 86397 transitions. [2022-01-18 06:22:09,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 86397 transitions. [2022-01-18 06:22:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:09,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:09,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:09,846 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 06:22:10,035 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 06:22:10,035 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash 991522436, now seen corresponding path program 12 times [2022-01-18 06:22:10,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:10,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986178086] [2022-01-18 06:22:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:10,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:10,131 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 06:22:10,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986178086] [2022-01-18 06:22:10,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986178086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113957987] [2022-01-18 06:22:10,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:22:10,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:10,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:10,133 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 06:22:10,135 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 06:22:10,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:22:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:22:10,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:10,410 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 32 treesize of output 26 [2022-01-18 06:22:10,474 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:10,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:22:10,487 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 06:22:10,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:10,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:10,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 06:22:10,663 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:10,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 06:22:10,802 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 06:22:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113957987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:10,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:10,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:22:10,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811955835] [2022-01-18 06:22:10,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:10,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:22:10,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:22:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:22:10,804 INFO L87 Difference]: Start difference. First operand 20660 states and 86397 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:11,535 INFO L93 Difference]: Finished difference Result 36208 states and 148002 transitions. [2022-01-18 06:22:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 06:22:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:11,727 INFO L225 Difference]: With dead ends: 36208 [2022-01-18 06:22:11,728 INFO L226 Difference]: Without dead ends: 36081 [2022-01-18 06:22:11,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:22:11,732 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 270 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:11,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 561 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:22:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36081 states. [2022-01-18 06:22:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36081 to 19626. [2022-01-18 06:22:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19626 states, 19625 states have (on average 4.1831847133757964) internal successors, (82095), 19625 states have internal predecessors, (82095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19626 states to 19626 states and 82095 transitions. [2022-01-18 06:22:12,457 INFO L78 Accepts]: Start accepts. Automaton has 19626 states and 82095 transitions. Word has length 34 [2022-01-18 06:22:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:12,457 INFO L470 AbstractCegarLoop]: Abstraction has 19626 states and 82095 transitions. [2022-01-18 06:22:12,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 19626 states and 82095 transitions. [2022-01-18 06:22:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:12,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:12,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:12,512 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 06:22:12,696 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 06:22:12,697 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1277158268, now seen corresponding path program 13 times [2022-01-18 06:22:12,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:12,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884006083] [2022-01-18 06:22:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:12,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:12,797 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 06:22:12,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884006083] [2022-01-18 06:22:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884006083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280459367] [2022-01-18 06:22:12,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:22:12,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:12,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:12,798 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 06:22:12,803 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 06:22:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:13,049 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:13,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-01-18 06:22:13,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 06:22:13,104 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 06:22:13,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:13,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:13,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:22:13,255 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:13,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:22:13,402 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 06:22:13,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280459367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:13,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:13,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:22:13,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906988315] [2022-01-18 06:22:13,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:13,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:22:13,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:22:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:22:13,404 INFO L87 Difference]: Start difference. First operand 19626 states and 82095 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 06:22:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:14,367 INFO L93 Difference]: Finished difference Result 40662 states and 166270 transitions. [2022-01-18 06:22:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:22:14,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 34 [2022-01-18 06:22:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:14,518 INFO L225 Difference]: With dead ends: 40662 [2022-01-18 06:22:14,518 INFO L226 Difference]: Without dead ends: 40587 [2022-01-18 06:22:14,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:22:14,519 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 309 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:14,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 852 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:22:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40587 states. [2022-01-18 06:22:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40587 to 21472. [2022-01-18 06:22:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21472 states, 21471 states have (on average 4.188533370592893) internal successors, (89932), 21471 states have internal predecessors, (89932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21472 states to 21472 states and 89932 transitions. [2022-01-18 06:22:15,234 INFO L78 Accepts]: Start accepts. Automaton has 21472 states and 89932 transitions. Word has length 34 [2022-01-18 06:22:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:15,234 INFO L470 AbstractCegarLoop]: Abstraction has 21472 states and 89932 transitions. [2022-01-18 06:22:15,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 06:22:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 21472 states and 89932 transitions. [2022-01-18 06:22:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:15,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:15,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:15,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-18 06:22:15,474 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 06:22:15,474 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash 611195350, now seen corresponding path program 14 times [2022-01-18 06:22:15,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:15,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912226581] [2022-01-18 06:22:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:15,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:15,558 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 06:22:15,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912226581] [2022-01-18 06:22:15,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912226581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103412880] [2022-01-18 06:22:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:22:15,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:15,560 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 06:22:15,560 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 06:22:15,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:22:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:15,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:16,014 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 32 treesize of output 26 [2022-01-18 06:22:16,042 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:16,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:22:16,065 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 06:22:16,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:16,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:16,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:22:16,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:16,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:22:16,343 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 06:22:16,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103412880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:16,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:16,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:22:16,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319963546] [2022-01-18 06:22:16,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:16,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:22:16,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:22:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:22:16,345 INFO L87 Difference]: Start difference. First operand 21472 states and 89932 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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 06:22:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:17,146 INFO L93 Difference]: Finished difference Result 35967 states and 147427 transitions. [2022-01-18 06:22:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:22:17,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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 34 [2022-01-18 06:22:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:17,265 INFO L225 Difference]: With dead ends: 35967 [2022-01-18 06:22:17,265 INFO L226 Difference]: Without dead ends: 35852 [2022-01-18 06:22:17,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:22:17,266 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 362 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:17,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 734 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:22:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35852 states. [2022-01-18 06:22:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35852 to 19950. [2022-01-18 06:22:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19950 states, 19949 states have (on average 4.187377813424232) internal successors, (83534), 19949 states have internal predecessors, (83534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19950 states to 19950 states and 83534 transitions. [2022-01-18 06:22:17,935 INFO L78 Accepts]: Start accepts. Automaton has 19950 states and 83534 transitions. Word has length 34 [2022-01-18 06:22:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:17,935 INFO L470 AbstractCegarLoop]: Abstraction has 19950 states and 83534 transitions. [2022-01-18 06:22:17,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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 06:22:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19950 states and 83534 transitions. [2022-01-18 06:22:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:17,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:17,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:17,988 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 06:22:18,173 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 06:22:18,173 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1723175018, now seen corresponding path program 15 times [2022-01-18 06:22:18,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:18,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275218033] [2022-01-18 06:22:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:18,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:18,265 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 06:22:18,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275218033] [2022-01-18 06:22:18,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275218033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530480004] [2022-01-18 06:22:18,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:22:18,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:18,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:18,266 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 06:22:18,267 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 06:22:18,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:22:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:22:18,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:18,528 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 26 treesize of output 20 [2022-01-18 06:22:18,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:18,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:18,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-01-18 06:22:18,671 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 06:22:18,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:19,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:19,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:22:19,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:19,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:19,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:19,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:19,166 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 31 treesize of output 39 [2022-01-18 06:22:19,283 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 06:22:19,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530480004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:19,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:19,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-18 06:22:19,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188542483] [2022-01-18 06:22:19,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:19,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:22:19,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:22:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:22:19,284 INFO L87 Difference]: Start difference. First operand 19950 states and 83534 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:20,272 INFO L93 Difference]: Finished difference Result 33562 states and 137398 transitions. [2022-01-18 06:22:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 06:22:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:20,369 INFO L225 Difference]: With dead ends: 33562 [2022-01-18 06:22:20,369 INFO L226 Difference]: Without dead ends: 33375 [2022-01-18 06:22:20,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:22:20,370 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 642 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:20,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 955 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 432 Invalid, 0 Unknown, 523 Unchecked, 0.2s Time] [2022-01-18 06:22:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33375 states. [2022-01-18 06:22:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33375 to 21342. [2022-01-18 06:22:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21342 states, 21341 states have (on average 4.188135513799728) internal successors, (89379), 21341 states have internal predecessors, (89379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21342 states to 21342 states and 89379 transitions. [2022-01-18 06:22:20,993 INFO L78 Accepts]: Start accepts. Automaton has 21342 states and 89379 transitions. Word has length 34 [2022-01-18 06:22:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:20,993 INFO L470 AbstractCegarLoop]: Abstraction has 21342 states and 89379 transitions. [2022-01-18 06:22:20,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21342 states and 89379 transitions. [2022-01-18 06:22:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:21,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:21,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:21,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 06:22:21,233 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 06:22:21,234 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash 105162736, now seen corresponding path program 16 times [2022-01-18 06:22:21,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730631541] [2022-01-18 06:22:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:21,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:21,333 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 06:22:21,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:21,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730631541] [2022-01-18 06:22:21,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730631541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:21,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006374788] [2022-01-18 06:22:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:22:21,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:21,335 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 06:22:21,336 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 06:22:21,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:22:21,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:21,571 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:21,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-01-18 06:22:21,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 06:22:21,635 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 06:22:21,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:21,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:21,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:22:21,948 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:21,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:22:22,107 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 06:22:22,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006374788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:22,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:22,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:22:22,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120665656] [2022-01-18 06:22:22,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:22:22,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:22:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:22:22,109 INFO L87 Difference]: Start difference. First operand 21342 states and 89379 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 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 06:22:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:23,367 INFO L93 Difference]: Finished difference Result 42875 states and 174962 transitions. [2022-01-18 06:22:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:22:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 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 34 [2022-01-18 06:22:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:23,510 INFO L225 Difference]: With dead ends: 42875 [2022-01-18 06:22:23,511 INFO L226 Difference]: Without dead ends: 42800 [2022-01-18 06:22:23,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:22:23,512 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 488 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:23,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 922 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:22:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42800 states. [2022-01-18 06:22:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42800 to 22274. [2022-01-18 06:22:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22274 states, 22273 states have (on average 4.190724195213936) internal successors, (93340), 22273 states have internal predecessors, (93340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22274 states to 22274 states and 93340 transitions. [2022-01-18 06:22:24,331 INFO L78 Accepts]: Start accepts. Automaton has 22274 states and 93340 transitions. Word has length 34 [2022-01-18 06:22:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:24,332 INFO L470 AbstractCegarLoop]: Abstraction has 22274 states and 93340 transitions. [2022-01-18 06:22:24,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 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 06:22:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22274 states and 93340 transitions. [2022-01-18 06:22:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:24,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:24,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:24,388 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 06:22:24,573 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 06:22:24,574 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash 361818198, now seen corresponding path program 17 times [2022-01-18 06:22:24,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:24,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041989628] [2022-01-18 06:22:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:24,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:24,678 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 06:22:24,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041989628] [2022-01-18 06:22:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041989628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372993009] [2022-01-18 06:22:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:22:24,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:24,680 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 06:22:24,681 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 06:22:24,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:22:24,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:22:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:25,062 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 34 treesize of output 28 [2022-01-18 06:22:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:25,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:25,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 53 [2022-01-18 06:22:25,229 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 06:22:25,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:25,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:25,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 06:22:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:25,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:25,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:25,584 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 06:22:25,618 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 06:22:25,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372993009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:25,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:25,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-18 06:22:25,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728003310] [2022-01-18 06:22:25,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:25,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:22:25,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:22:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:22:25,620 INFO L87 Difference]: Start difference. First operand 22274 states and 93340 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:28,536 INFO L93 Difference]: Finished difference Result 75419 states and 305489 transitions. [2022-01-18 06:22:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:22:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:28,815 INFO L225 Difference]: With dead ends: 75419 [2022-01-18 06:22:28,816 INFO L226 Difference]: Without dead ends: 75064 [2022-01-18 06:22:28,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=903, Invalid=3927, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:22:28,817 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1280 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:28,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1442 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1554 Invalid, 0 Unknown, 246 Unchecked, 0.8s Time] [2022-01-18 06:22:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75064 states. [2022-01-18 06:22:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75064 to 30624. [2022-01-18 06:22:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30624 states, 30623 states have (on average 4.278156940861444) internal successors, (131010), 30623 states have internal predecessors, (131010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30624 states to 30624 states and 131010 transitions. [2022-01-18 06:22:30,334 INFO L78 Accepts]: Start accepts. Automaton has 30624 states and 131010 transitions. Word has length 34 [2022-01-18 06:22:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:30,335 INFO L470 AbstractCegarLoop]: Abstraction has 30624 states and 131010 transitions. [2022-01-18 06:22:30,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30624 states and 131010 transitions. [2022-01-18 06:22:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:30,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:30,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:30,411 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 06:22:30,596 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 06:22:30,596 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1881464134, now seen corresponding path program 18 times [2022-01-18 06:22:30,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:30,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857183951] [2022-01-18 06:22:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:30,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:30,701 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 06:22:30,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857183951] [2022-01-18 06:22:30,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857183951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847796966] [2022-01-18 06:22:30,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:22:30,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:30,702 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 06:22:30,703 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 06:22:30,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:22:30,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:22:30,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:30,904 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 17 treesize of output 13 [2022-01-18 06:22:30,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:30,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:30,984 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 29 treesize of output 33 [2022-01-18 06:22:31,143 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 06:22:31,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:31,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:31,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 06:22:31,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:31,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:31,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:31,747 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 29 treesize of output 37 [2022-01-18 06:22:31,812 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 06:22:31,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847796966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:31,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:31,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-01-18 06:22:31,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124497368] [2022-01-18 06:22:31,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:31,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:22:31,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:22:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:22:31,814 INFO L87 Difference]: Start difference. First operand 30624 states and 131010 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:33,745 INFO L93 Difference]: Finished difference Result 81051 states and 337213 transitions. [2022-01-18 06:22:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:22:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:34,364 INFO L225 Difference]: With dead ends: 81051 [2022-01-18 06:22:34,365 INFO L226 Difference]: Without dead ends: 80896 [2022-01-18 06:22:34,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=613, Invalid=2467, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:22:34,365 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 875 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1324 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:34,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 1145 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 794 Invalid, 0 Unknown, 1324 Unchecked, 0.4s Time] [2022-01-18 06:22:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80896 states. [2022-01-18 06:22:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80896 to 31625. [2022-01-18 06:22:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31625 states, 31624 states have (on average 4.278143182393119) internal successors, (135292), 31624 states have internal predecessors, (135292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31625 states to 31625 states and 135292 transitions. [2022-01-18 06:22:35,729 INFO L78 Accepts]: Start accepts. Automaton has 31625 states and 135292 transitions. Word has length 34 [2022-01-18 06:22:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:35,729 INFO L470 AbstractCegarLoop]: Abstraction has 31625 states and 135292 transitions. [2022-01-18 06:22:35,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 31625 states and 135292 transitions. [2022-01-18 06:22:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:35,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:35,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:35,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 06:22:36,009 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 06:22:36,009 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:36,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1083213802, now seen corresponding path program 19 times [2022-01-18 06:22:36,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:36,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300164284] [2022-01-18 06:22:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:36,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:36,095 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 06:22:36,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:36,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300164284] [2022-01-18 06:22:36,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300164284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:36,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878688052] [2022-01-18 06:22:36,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:22:36,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:36,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:36,097 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 06:22:36,097 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 06:22:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:36,348 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 26 treesize of output 20 [2022-01-18 06:22:36,399 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:36,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:22:36,421 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 06:22:36,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:36,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:36,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:22:36,609 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:36,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:22:36,757 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 06:22:36,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878688052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:36,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:36,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:22:36,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914171561] [2022-01-18 06:22:36,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:36,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:22:36,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:22:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:22:36,759 INFO L87 Difference]: Start difference. First operand 31625 states and 135292 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 06:22:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:38,120 INFO L93 Difference]: Finished difference Result 55806 states and 232842 transitions. [2022-01-18 06:22:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:22:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 34 [2022-01-18 06:22:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:38,313 INFO L225 Difference]: With dead ends: 55806 [2022-01-18 06:22:38,313 INFO L226 Difference]: Without dead ends: 55571 [2022-01-18 06:22:38,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:22:38,314 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 355 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:38,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 980 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:22:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55571 states. [2022-01-18 06:22:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55571 to 30592. [2022-01-18 06:22:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30592 states, 30591 states have (on average 4.281226504527475) internal successors, (130967), 30591 states have internal predecessors, (130967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30592 states to 30592 states and 130967 transitions. [2022-01-18 06:22:39,523 INFO L78 Accepts]: Start accepts. Automaton has 30592 states and 130967 transitions. Word has length 34 [2022-01-18 06:22:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:39,523 INFO L470 AbstractCegarLoop]: Abstraction has 30592 states and 130967 transitions. [2022-01-18 06:22:39,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 06:22:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30592 states and 130967 transitions. [2022-01-18 06:22:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:39,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:39,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:39,904 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 06:22:40,069 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 06:22:40,070 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1008596802, now seen corresponding path program 20 times [2022-01-18 06:22:40,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:40,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523083066] [2022-01-18 06:22:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:40,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:40,172 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 06:22:40,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523083066] [2022-01-18 06:22:40,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523083066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589143911] [2022-01-18 06:22:40,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:22:40,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:40,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:40,174 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 06:22:40,175 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 06:22:40,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:22:40,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:40,356 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 13 treesize of output 9 [2022-01-18 06:22:40,422 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:40,422 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 25 treesize of output 13 [2022-01-18 06:22:40,449 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 06:22:40,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:40,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:40,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:22:40,631 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:40,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 56 [2022-01-18 06:22:40,763 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 06:22:40,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589143911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:40,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:40,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 06:22:40,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635788734] [2022-01-18 06:22:40,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:40,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 06:22:40,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 06:22:40,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 06:22:40,765 INFO L87 Difference]: Start difference. First operand 30592 states and 130967 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 06:22:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:41,852 INFO L93 Difference]: Finished difference Result 51755 states and 215576 transitions. [2022-01-18 06:22:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:22:41,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 34 [2022-01-18 06:22:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:42,031 INFO L225 Difference]: With dead ends: 51755 [2022-01-18 06:22:42,032 INFO L226 Difference]: Without dead ends: 51600 [2022-01-18 06:22:42,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:22:42,033 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 582 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:42,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 686 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:22:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51600 states. [2022-01-18 06:22:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51600 to 30829. [2022-01-18 06:22:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30829 states, 30828 states have (on average 4.280134942260283) internal successors, (131948), 30828 states have internal predecessors, (131948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30829 states to 30829 states and 131948 transitions. [2022-01-18 06:22:43,541 INFO L78 Accepts]: Start accepts. Automaton has 30829 states and 131948 transitions. Word has length 34 [2022-01-18 06:22:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:43,541 INFO L470 AbstractCegarLoop]: Abstraction has 30829 states and 131948 transitions. [2022-01-18 06:22:43,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 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 06:22:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30829 states and 131948 transitions. [2022-01-18 06:22:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:43,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:43,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:43,625 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 06:22:43,810 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 06:22:43,811 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash -273716218, now seen corresponding path program 21 times [2022-01-18 06:22:43,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:43,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477808731] [2022-01-18 06:22:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:43,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:43,904 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 06:22:43,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:43,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477808731] [2022-01-18 06:22:43,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477808731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:43,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109331271] [2022-01-18 06:22:43,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:22:43,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:43,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:43,906 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 06:22:43,908 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 06:22:43,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:22:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:22:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:44,088 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 13 treesize of output 9 [2022-01-18 06:22:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:44,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:44,168 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 37 treesize of output 37 [2022-01-18 06:22:44,257 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 06:22:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:44,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:44,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 06:22:44,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:44,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:44,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:44,590 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 30 treesize of output 36 [2022-01-18 06:22:44,698 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 06:22:44,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109331271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:44,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:44,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-18 06:22:44,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644577899] [2022-01-18 06:22:44,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:44,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:22:44,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:22:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:22:44,699 INFO L87 Difference]: Start difference. First operand 30829 states and 131948 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:45,447 INFO L93 Difference]: Finished difference Result 43107 states and 181657 transitions. [2022-01-18 06:22:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:22:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:45,900 INFO L225 Difference]: With dead ends: 43107 [2022-01-18 06:22:45,900 INFO L226 Difference]: Without dead ends: 42952 [2022-01-18 06:22:45,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:22:45,901 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 678 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:45,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 770 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 370 Invalid, 0 Unknown, 377 Unchecked, 0.2s Time] [2022-01-18 06:22:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42952 states. [2022-01-18 06:22:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42952 to 31184. [2022-01-18 06:22:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31184 states, 31183 states have (on average 4.281339191225989) internal successors, (133505), 31183 states have internal predecessors, (133505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31184 states to 31184 states and 133505 transitions. [2022-01-18 06:22:46,928 INFO L78 Accepts]: Start accepts. Automaton has 31184 states and 133505 transitions. Word has length 34 [2022-01-18 06:22:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:46,929 INFO L470 AbstractCegarLoop]: Abstraction has 31184 states and 133505 transitions. [2022-01-18 06:22:46,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31184 states and 133505 transitions. [2022-01-18 06:22:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:47,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:47,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:47,021 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 06:22:47,207 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 06:22:47,207 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash -713242418, now seen corresponding path program 22 times [2022-01-18 06:22:47,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:47,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370846111] [2022-01-18 06:22:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:47,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:47,301 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 06:22:47,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370846111] [2022-01-18 06:22:47,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370846111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539844] [2022-01-18 06:22:47,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:22:47,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:47,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:47,302 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 06:22:47,303 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 06:22:47,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:22:47,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:47,539 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:47,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2022-01-18 06:22:47,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 06:22:47,594 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 06:22:47,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:47,687 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:47,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 53 [2022-01-18 06:22:47,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:47,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:22:47,846 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 06:22:47,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:47,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:47,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:22:47,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333790057] [2022-01-18 06:22:47,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:47,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:22:47,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:22:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:22:47,848 INFO L87 Difference]: Start difference. First operand 31184 states and 133505 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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 06:22:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:49,087 INFO L93 Difference]: Finished difference Result 51124 states and 214336 transitions. [2022-01-18 06:22:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:22:49,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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 34 [2022-01-18 06:22:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:49,574 INFO L225 Difference]: With dead ends: 51124 [2022-01-18 06:22:49,574 INFO L226 Difference]: Without dead ends: 51049 [2022-01-18 06:22:49,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:22:49,575 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 289 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:49,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1598 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:22:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51049 states. [2022-01-18 06:22:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51049 to 33125. [2022-01-18 06:22:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33125 states, 33124 states have (on average 4.282061345248159) internal successors, (141839), 33124 states have internal predecessors, (141839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33125 states to 33125 states and 141839 transitions. [2022-01-18 06:22:50,846 INFO L78 Accepts]: Start accepts. Automaton has 33125 states and 141839 transitions. Word has length 34 [2022-01-18 06:22:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:50,847 INFO L470 AbstractCegarLoop]: Abstraction has 33125 states and 141839 transitions. [2022-01-18 06:22:50,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 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 06:22:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 33125 states and 141839 transitions. [2022-01-18 06:22:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:50,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:50,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:50,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 06:22:51,128 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 06:22:51,129 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1379205336, now seen corresponding path program 23 times [2022-01-18 06:22:51,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:51,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716391964] [2022-01-18 06:22:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:51,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:51,206 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 06:22:51,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716391964] [2022-01-18 06:22:51,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716391964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201125543] [2022-01-18 06:22:51,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:22:51,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:51,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:51,207 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 06:22:51,208 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 06:22:51,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:22:51,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:22:51,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:51,590 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 23 treesize of output 15 [2022-01-18 06:22:51,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:51,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:51,633 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 18 treesize of output 10 [2022-01-18 06:22:51,654 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 06:22:51,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:51,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:51,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:51,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:51,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-01-18 06:22:51,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:51,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:22:52,016 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 06:22:52,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201125543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:52,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:52,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-18 06:22:52,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933681248] [2022-01-18 06:22:52,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:52,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:22:52,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:22:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:22:52,017 INFO L87 Difference]: Start difference. First operand 33125 states and 141839 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:52,579 INFO L93 Difference]: Finished difference Result 46443 states and 194219 transitions. [2022-01-18 06:22:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:22:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:52,725 INFO L225 Difference]: With dead ends: 46443 [2022-01-18 06:22:52,725 INFO L226 Difference]: Without dead ends: 46334 [2022-01-18 06:22:52,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:22:52,726 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 271 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:52,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 754 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 403 Invalid, 0 Unknown, 474 Unchecked, 0.2s Time] [2022-01-18 06:22:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46334 states. [2022-01-18 06:22:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46334 to 34272. [2022-01-18 06:22:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34272 states, 34271 states have (on average 4.281287385836421) internal successors, (146724), 34271 states have internal predecessors, (146724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34272 states to 34272 states and 146724 transitions. [2022-01-18 06:22:54,040 INFO L78 Accepts]: Start accepts. Automaton has 34272 states and 146724 transitions. Word has length 34 [2022-01-18 06:22:54,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:54,040 INFO L470 AbstractCegarLoop]: Abstraction has 34272 states and 146724 transitions. [2022-01-18 06:22:54,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 34272 states and 146724 transitions. [2022-01-18 06:22:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:54,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:54,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:54,129 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 06:22:54,315 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 06:22:54,315 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1167436596, now seen corresponding path program 24 times [2022-01-18 06:22:54,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263176089] [2022-01-18 06:22:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:54,403 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 06:22:54,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:54,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263176089] [2022-01-18 06:22:54,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263176089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:54,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053031535] [2022-01-18 06:22:54,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:22:54,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:54,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:54,405 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 06:22:54,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:22:54,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:22:54,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:22:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:22:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:54,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-01-18 06:22:54,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:54,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:54,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-01-18 06:22:54,832 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 06:22:54,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:55,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:55,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:22:55,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:22:55,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:55,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2022-01-18 06:22:55,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:55,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-01-18 06:22:55,290 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 06:22:55,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053031535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:55,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:55,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-18 06:22:55,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348552310] [2022-01-18 06:22:55,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:55,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:22:55,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:22:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:22:55,292 INFO L87 Difference]: Start difference. First operand 34272 states and 146724 transitions. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:22:56,712 INFO L93 Difference]: Finished difference Result 60838 states and 255565 transitions. [2022-01-18 06:22:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:22:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:22:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:22:56,971 INFO L225 Difference]: With dead ends: 60838 [2022-01-18 06:22:56,971 INFO L226 Difference]: Without dead ends: 60783 [2022-01-18 06:22:56,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:22:56,972 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 362 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:22:56,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 975 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 636 Invalid, 0 Unknown, 513 Unchecked, 0.3s Time] [2022-01-18 06:22:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60783 states. [2022-01-18 06:22:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60783 to 36380. [2022-01-18 06:22:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36380 states, 36379 states have (on average 4.277055444074878) internal successors, (155595), 36379 states have internal predecessors, (155595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36380 states to 36380 states and 155595 transitions. [2022-01-18 06:22:58,360 INFO L78 Accepts]: Start accepts. Automaton has 36380 states and 155595 transitions. Word has length 34 [2022-01-18 06:22:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:22:58,361 INFO L470 AbstractCegarLoop]: Abstraction has 36380 states and 155595 transitions. [2022-01-18 06:22:58,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:22:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 36380 states and 155595 transitions. [2022-01-18 06:22:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:22:58,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:22:58,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:22:58,460 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 06:22:58,645 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 06:22:58,645 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:22:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:22:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1588245140, now seen corresponding path program 25 times [2022-01-18 06:22:58,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:22:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077991825] [2022-01-18 06:22:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:22:58,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:22:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:58,733 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 06:22:58,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:22:58,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077991825] [2022-01-18 06:22:58,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077991825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:22:58,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881999844] [2022-01-18 06:22:58,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:22:58,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:22:58,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:22:58,735 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 06:22:58,762 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 06:22:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:22:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:22:58,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:22:59,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-01-18 06:22:59,097 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:22:59,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:22:59,123 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 06:22:59,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:22:59,240 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:22:59,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 53 [2022-01-18 06:22:59,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:22:59,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:22:59,401 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 06:22:59,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881999844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:22:59,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:22:59,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:22:59,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434108718] [2022-01-18 06:22:59,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:22:59,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:22:59,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:22:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:22:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:22:59,402 INFO L87 Difference]: Start difference. First operand 36380 states and 155595 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 06:23:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:00,541 INFO L93 Difference]: Finished difference Result 57642 states and 242703 transitions. [2022-01-18 06:23:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 06:23:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 34 [2022-01-18 06:23:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:00,802 INFO L225 Difference]: With dead ends: 57642 [2022-01-18 06:23:00,802 INFO L226 Difference]: Without dead ends: 57349 [2022-01-18 06:23:00,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:23:00,802 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 242 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:00,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 710 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:23:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57349 states. [2022-01-18 06:23:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57349 to 32247. [2022-01-18 06:23:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32247 states, 32246 states have (on average 4.284531414749116) internal successors, (138159), 32246 states have internal predecessors, (138159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32247 states to 32247 states and 138159 transitions. [2022-01-18 06:23:02,013 INFO L78 Accepts]: Start accepts. Automaton has 32247 states and 138159 transitions. Word has length 34 [2022-01-18 06:23:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:02,013 INFO L470 AbstractCegarLoop]: Abstraction has 32247 states and 138159 transitions. [2022-01-18 06:23:02,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 06:23:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 32247 states and 138159 transitions. [2022-01-18 06:23:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:02,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:02,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:02,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 06:23:02,279 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 06:23:02,279 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 581391592, now seen corresponding path program 26 times [2022-01-18 06:23:02,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:02,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784924959] [2022-01-18 06:23:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:02,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:02,383 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 06:23:02,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:02,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784924959] [2022-01-18 06:23:02,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784924959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:02,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380529647] [2022-01-18 06:23:02,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:23:02,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:02,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:02,385 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 06:23:02,411 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 06:23:02,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:23:02,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:02,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:23:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:02,644 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 26 treesize of output 20 [2022-01-18 06:23:02,691 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:23:02,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:23:02,712 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 06:23:02,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:02,807 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:23:02,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 53 [2022-01-18 06:23:02,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:02,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:23:02,961 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 06:23:02,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380529647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:02,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:02,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:23:02,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803561211] [2022-01-18 06:23:02,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:02,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:23:02,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:23:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:23:02,962 INFO L87 Difference]: Start difference. First operand 32247 states and 138159 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 06:23:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:03,770 INFO L93 Difference]: Finished difference Result 56489 states and 237471 transitions. [2022-01-18 06:23:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:23:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 34 [2022-01-18 06:23:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:04,399 INFO L225 Difference]: With dead ends: 56489 [2022-01-18 06:23:04,399 INFO L226 Difference]: Without dead ends: 56254 [2022-01-18 06:23:04,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:23:04,400 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 233 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:04,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 782 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:23:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56254 states. [2022-01-18 06:23:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56254 to 31835. [2022-01-18 06:23:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 4.285637997110008) internal successors, (136429), 31834 states have internal predecessors, (136429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 136429 transitions. [2022-01-18 06:23:05,849 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 136429 transitions. Word has length 34 [2022-01-18 06:23:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:05,850 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 136429 transitions. [2022-01-18 06:23:05,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 06:23:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 136429 transitions. [2022-01-18 06:23:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:05,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:05,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:05,946 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 06:23:06,131 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 06:23:06,132 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash -108936552, now seen corresponding path program 27 times [2022-01-18 06:23:06,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500652997] [2022-01-18 06:23:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:06,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:06,251 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 06:23:06,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:06,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500652997] [2022-01-18 06:23:06,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500652997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:06,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008190869] [2022-01-18 06:23:06,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:23:06,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:06,253 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 06:23:06,254 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 06:23:06,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:23:06,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:23:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:06,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 06:23:06,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:06,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:06,553 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 37 treesize of output 37 [2022-01-18 06:23:06,658 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 06:23:06,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:06,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:23:06,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:23:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:06,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:06,882 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 28 treesize of output 34 [2022-01-18 06:23:06,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:06,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2022-01-18 06:23:07,074 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 06:23:07,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008190869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:07,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:07,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-18 06:23:07,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043792311] [2022-01-18 06:23:07,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:07,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:23:07,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:23:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:23:07,076 INFO L87 Difference]: Start difference. First operand 31835 states and 136429 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:08,198 INFO L93 Difference]: Finished difference Result 54089 states and 227094 transitions. [2022-01-18 06:23:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:23:08,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:23:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:08,407 INFO L225 Difference]: With dead ends: 54089 [2022-01-18 06:23:08,407 INFO L226 Difference]: Without dead ends: 53974 [2022-01-18 06:23:08,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:23:08,408 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 528 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:08,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 978 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 964 Invalid, 0 Unknown, 421 Unchecked, 0.4s Time] [2022-01-18 06:23:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53974 states. [2022-01-18 06:23:09,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53974 to 31835. [2022-01-18 06:23:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 4.285637997110008) internal successors, (136429), 31834 states have internal predecessors, (136429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 136429 transitions. [2022-01-18 06:23:09,552 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 136429 transitions. Word has length 34 [2022-01-18 06:23:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:09,552 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 136429 transitions. [2022-01-18 06:23:09,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 136429 transitions. [2022-01-18 06:23:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:09,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:09,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:09,843 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 06:23:10,028 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 06:23:10,029 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash -981803884, now seen corresponding path program 28 times [2022-01-18 06:23:10,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:10,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433656989] [2022-01-18 06:23:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:10,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:10,130 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 06:23:10,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433656989] [2022-01-18 06:23:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433656989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086845024] [2022-01-18 06:23:10,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:23:10,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:10,131 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 06:23:10,132 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 06:23:10,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:23:10,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:10,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:23:10,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:10,305 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 13 treesize of output 9 [2022-01-18 06:23:10,373 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:23:10,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:23:10,399 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 06:23:10,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:10,526 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:23:10,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 53 [2022-01-18 06:23:10,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:10,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:23:10,699 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 06:23:10,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086845024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:10,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:10,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 06:23:10,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519720071] [2022-01-18 06:23:10,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:10,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 06:23:10,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 06:23:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 06:23:10,700 INFO L87 Difference]: Start difference. First operand 31835 states and 136429 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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 06:23:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:11,787 INFO L93 Difference]: Finished difference Result 54606 states and 227432 transitions. [2022-01-18 06:23:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 06:23:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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 34 [2022-01-18 06:23:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:12,018 INFO L225 Difference]: With dead ends: 54606 [2022-01-18 06:23:12,018 INFO L226 Difference]: Without dead ends: 54451 [2022-01-18 06:23:12,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:23:12,019 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 446 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:12,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 910 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:23:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54451 states. [2022-01-18 06:23:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54451 to 31835. [2022-01-18 06:23:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 4.285637997110008) internal successors, (136429), 31834 states have internal predecessors, (136429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 136429 transitions. [2022-01-18 06:23:13,327 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 136429 transitions. Word has length 34 [2022-01-18 06:23:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:13,327 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 136429 transitions. [2022-01-18 06:23:13,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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 06:23:13,328 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 136429 transitions. [2022-01-18 06:23:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:13,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:13,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:13,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 06:23:13,593 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 06:23:13,593 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:13,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2030850392, now seen corresponding path program 29 times [2022-01-18 06:23:13,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:13,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795106317] [2022-01-18 06:23:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:13,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:13,694 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 06:23:13,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795106317] [2022-01-18 06:23:13,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795106317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343472241] [2022-01-18 06:23:13,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:23:13,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:13,696 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 06:23:13,698 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 06:23:13,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:23:13,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:23:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:13,888 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 13 treesize of output 9 [2022-01-18 06:23:14,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:14,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 06:23:14,320 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 06:23:14,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:14,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:14,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:14,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 42 [2022-01-18 06:23:14,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:14,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:23:14,758 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 06:23:14,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343472241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:14,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:14,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-01-18 06:23:14,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680190975] [2022-01-18 06:23:14,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:14,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:23:14,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:23:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:23:14,760 INFO L87 Difference]: Start difference. First operand 31835 states and 136429 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 06:23:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:16,132 INFO L93 Difference]: Finished difference Result 69131 states and 291724 transitions. [2022-01-18 06:23:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:23:16,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 34 [2022-01-18 06:23:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:16,436 INFO L225 Difference]: With dead ends: 69131 [2022-01-18 06:23:16,436 INFO L226 Difference]: Without dead ends: 68953 [2022-01-18 06:23:16,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=339, Invalid=1731, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:23:16,437 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 642 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:16,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1205 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 760 Invalid, 0 Unknown, 468 Unchecked, 0.3s Time] [2022-01-18 06:23:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68953 states. [2022-01-18 06:23:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68953 to 32599. [2022-01-18 06:23:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32599 states, 32598 states have (on average 4.282870114730965) internal successors, (139613), 32598 states have internal predecessors, (139613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32599 states to 32599 states and 139613 transitions. [2022-01-18 06:23:17,774 INFO L78 Accepts]: Start accepts. Automaton has 32599 states and 139613 transitions. Word has length 34 [2022-01-18 06:23:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:17,774 INFO L470 AbstractCegarLoop]: Abstraction has 32599 states and 139613 transitions. [2022-01-18 06:23:17,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 06:23:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32599 states and 139613 transitions. [2022-01-18 06:23:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:18,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:18,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:18,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 06:23:18,263 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 06:23:18,263 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -436137612, now seen corresponding path program 30 times [2022-01-18 06:23:18,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:18,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272236345] [2022-01-18 06:23:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:18,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:18,346 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 06:23:18,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:18,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272236345] [2022-01-18 06:23:18,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272236345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:18,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186172324] [2022-01-18 06:23:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:23:18,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:18,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:18,348 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 06:23:18,348 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 06:23:18,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:23:18,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:18,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:23:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:18,499 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 13 treesize of output 9 [2022-01-18 06:23:18,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:18,579 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 13 treesize of output 17 [2022-01-18 06:23:18,635 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 06:23:18,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:18,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:18,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 42 [2022-01-18 06:23:19,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:19,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:23:19,116 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 06:23:19,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186172324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:19,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:19,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-01-18 06:23:19,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550949978] [2022-01-18 06:23:19,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:19,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:23:19,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:23:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:23:19,117 INFO L87 Difference]: Start difference. First operand 32599 states and 139613 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:20,531 INFO L93 Difference]: Finished difference Result 68380 states and 286635 transitions. [2022-01-18 06:23:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:23:20,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-18 06:23:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:20,788 INFO L225 Difference]: With dead ends: 68380 [2022-01-18 06:23:20,789 INFO L226 Difference]: Without dead ends: 68170 [2022-01-18 06:23:20,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:23:20,789 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 616 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:20,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1221 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1055 Invalid, 0 Unknown, 364 Unchecked, 0.4s Time] [2022-01-18 06:23:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68170 states. [2022-01-18 06:23:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68170 to 32345. [2022-01-18 06:23:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32345 states, 32344 states have (on average 4.285091516200841) internal successors, (138597), 32344 states have internal predecessors, (138597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32345 states to 32345 states and 138597 transitions. [2022-01-18 06:23:22,445 INFO L78 Accepts]: Start accepts. Automaton has 32345 states and 138597 transitions. Word has length 34 [2022-01-18 06:23:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:22,446 INFO L470 AbstractCegarLoop]: Abstraction has 32345 states and 138597 transitions. [2022-01-18 06:23:22,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 32345 states and 138597 transitions. [2022-01-18 06:23:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:22,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:22,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:22,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 06:23:22,716 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 06:23:22,717 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash 105520768, now seen corresponding path program 31 times [2022-01-18 06:23:22,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:22,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367797425] [2022-01-18 06:23:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:22,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:22,812 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 06:23:22,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367797425] [2022-01-18 06:23:22,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367797425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721956618] [2022-01-18 06:23:22,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:23:22,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:22,814 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 06:23:22,816 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 06:23:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:23:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:22,986 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 13 treesize of output 9 [2022-01-18 06:23:23,083 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:23:23,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:23:23,110 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 06:23:23,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:23,206 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:23:23,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 50 [2022-01-18 06:23:23,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:23,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:23:23,365 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 06:23:23,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721956618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:23,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:23,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:23:23,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685344217] [2022-01-18 06:23:23,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:23,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:23:23,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:23:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:23:23,366 INFO L87 Difference]: Start difference. First operand 32345 states and 138597 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 06:23:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:24,057 INFO L93 Difference]: Finished difference Result 50853 states and 213215 transitions. [2022-01-18 06:23:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:23:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 34 [2022-01-18 06:23:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:24,257 INFO L225 Difference]: With dead ends: 50853 [2022-01-18 06:23:24,258 INFO L226 Difference]: Without dead ends: 50698 [2022-01-18 06:23:24,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:23:24,258 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 427 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:24,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 512 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:23:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2022-01-18 06:23:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 32365. [2022-01-18 06:23:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32365 states, 32364 states have (on average 4.284977135088369) internal successors, (138679), 32364 states have internal predecessors, (138679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32365 states to 32365 states and 138679 transitions. [2022-01-18 06:23:25,489 INFO L78 Accepts]: Start accepts. Automaton has 32365 states and 138679 transitions. Word has length 34 [2022-01-18 06:23:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:25,489 INFO L470 AbstractCegarLoop]: Abstraction has 32365 states and 138679 transitions. [2022-01-18 06:23:25,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 06:23:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 32365 states and 138679 transitions. [2022-01-18 06:23:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-18 06:23:25,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:25,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:25,574 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 06:23:25,760 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 06:23:25,760 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1298836420, now seen corresponding path program 32 times [2022-01-18 06:23:25,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:25,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878985577] [2022-01-18 06:23:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:25,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:25,847 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 06:23:25,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:25,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878985577] [2022-01-18 06:23:25,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878985577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:25,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509064946] [2022-01-18 06:23:25,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:23:25,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:25,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:25,849 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 06:23:25,851 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 06:23:25,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:23:25,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:23:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:25,977 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 13 treesize of output 9 [2022-01-18 06:23:26,073 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:23:26,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 06:23:26,100 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 06:23:26,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:26,180 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:23:26,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 50 [2022-01-18 06:23:26,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:26,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 06:23:26,345 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 06:23:26,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509064946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:26,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:26,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:23:26,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085271309] [2022-01-18 06:23:26,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:26,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:23:26,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:26,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:23:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:23:26,346 INFO L87 Difference]: Start difference. First operand 32365 states and 138679 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 06:23:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:27,231 INFO L93 Difference]: Finished difference Result 51295 states and 215180 transitions. [2022-01-18 06:23:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:23:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 34 [2022-01-18 06:23:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:27,416 INFO L225 Difference]: With dead ends: 51295 [2022-01-18 06:23:27,416 INFO L226 Difference]: Without dead ends: 51140 [2022-01-18 06:23:27,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:23:27,417 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 422 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:27,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 602 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:23:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51140 states. [2022-01-18 06:23:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51140 to 32602. [2022-01-18 06:23:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32602 states, 32601 states have (on average 4.283917671237079) internal successors, (139660), 32601 states have internal predecessors, (139660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32602 states to 32602 states and 139660 transitions. [2022-01-18 06:23:28,602 INFO L78 Accepts]: Start accepts. Automaton has 32602 states and 139660 transitions. Word has length 34 [2022-01-18 06:23:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:28,602 INFO L470 AbstractCegarLoop]: Abstraction has 32602 states and 139660 transitions. [2022-01-18 06:23:28,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 06:23:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 32602 states and 139660 transitions. [2022-01-18 06:23:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 06:23:28,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:28,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:28,693 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 06:23:28,878 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 06:23:28,878 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:28,879 INFO L85 PathProgramCache]: Analyzing trace with hash -119249945, now seen corresponding path program 8 times [2022-01-18 06:23:28,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:28,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794553601] [2022-01-18 06:23:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:28,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:23:28,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:28,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794553601] [2022-01-18 06:23:28,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794553601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:28,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091764469] [2022-01-18 06:23:28,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:23:28,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:28,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:28,952 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 06:23:28,953 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 06:23:28,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:23:28,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 06:23:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:23:29,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:23:29,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091764469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:29,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:29,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 10 [2022-01-18 06:23:29,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306408545] [2022-01-18 06:23:29,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:29,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:23:29,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:23:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:23:29,089 INFO L87 Difference]: Start difference. First operand 32602 states and 139660 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 06:23:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:29,508 INFO L93 Difference]: Finished difference Result 51748 states and 220299 transitions. [2022-01-18 06:23:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:23:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 36 [2022-01-18 06:23:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:29,705 INFO L225 Difference]: With dead ends: 51748 [2022-01-18 06:23:29,705 INFO L226 Difference]: Without dead ends: 50880 [2022-01-18 06:23:29,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:23:29,706 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 189 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:29,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 178 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:23:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50880 states. [2022-01-18 06:23:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50880 to 45321. [2022-01-18 06:23:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 4.279435127978817) internal successors, (193944), 45320 states have internal predecessors, (193944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 193944 transitions. [2022-01-18 06:23:31,565 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 193944 transitions. Word has length 36 [2022-01-18 06:23:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:31,565 INFO L470 AbstractCegarLoop]: Abstraction has 45321 states and 193944 transitions. [2022-01-18 06:23:31,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 06:23:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 193944 transitions. [2022-01-18 06:23:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 06:23:31,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:31,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:31,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 06:23:31,868 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 06:23:31,868 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1081167290, now seen corresponding path program 33 times [2022-01-18 06:23:31,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:31,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459978919] [2022-01-18 06:23:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:31,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 06:23:31,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:31,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459978919] [2022-01-18 06:23:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459978919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:23:31,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:23:31,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:23:31,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140851936] [2022-01-18 06:23:31,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:23:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:23:31,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:23:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:23:31,892 INFO L87 Difference]: Start difference. First operand 45321 states and 193944 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:32,378 INFO L93 Difference]: Finished difference Result 73910 states and 314768 transitions. [2022-01-18 06:23:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:23:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-18 06:23:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:32,642 INFO L225 Difference]: With dead ends: 73910 [2022-01-18 06:23:32,642 INFO L226 Difference]: Without dead ends: 73204 [2022-01-18 06:23:32,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:23:32,643 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:32,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 63 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:23:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73204 states. [2022-01-18 06:23:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73204 to 69123. [2022-01-18 06:23:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69123 states, 69122 states have (on average 4.292772199878476) internal successors, (296725), 69122 states have internal predecessors, (296725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69123 states to 69123 states and 296725 transitions. [2022-01-18 06:23:35,087 INFO L78 Accepts]: Start accepts. Automaton has 69123 states and 296725 transitions. Word has length 36 [2022-01-18 06:23:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:35,087 INFO L470 AbstractCegarLoop]: Abstraction has 69123 states and 296725 transitions. [2022-01-18 06:23:35,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 69123 states and 296725 transitions. [2022-01-18 06:23:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:23:35,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:35,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:35,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-18 06:23:35,252 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1079184829, now seen corresponding path program 34 times [2022-01-18 06:23:35,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30544787] [2022-01-18 06:23:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:35,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:35,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:35,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30544787] [2022-01-18 06:23:35,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30544787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:35,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420111086] [2022-01-18 06:23:35,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:23:35,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:35,287 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 06:23:35,288 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 06:23:35,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:23:35,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 06:23:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:35,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:35,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420111086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:35,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:35,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 06:23:35,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462468066] [2022-01-18 06:23:35,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:35,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:23:35,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:23:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:23:35,520 INFO L87 Difference]: Start difference. First operand 69123 states and 296725 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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 06:23:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:37,585 INFO L93 Difference]: Finished difference Result 172974 states and 716270 transitions. [2022-01-18 06:23:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:23:37,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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 37 [2022-01-18 06:23:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:39,039 INFO L225 Difference]: With dead ends: 172974 [2022-01-18 06:23:39,040 INFO L226 Difference]: Without dead ends: 172103 [2022-01-18 06:23:39,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:23:39,040 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 620 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:39,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 114 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:23:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172103 states. [2022-01-18 06:23:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172103 to 94089. [2022-01-18 06:23:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94089 states, 94088 states have (on average 4.412868803673157) internal successors, (415198), 94088 states have internal predecessors, (415198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94089 states to 94089 states and 415198 transitions. [2022-01-18 06:23:43,774 INFO L78 Accepts]: Start accepts. Automaton has 94089 states and 415198 transitions. Word has length 37 [2022-01-18 06:23:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:43,774 INFO L470 AbstractCegarLoop]: Abstraction has 94089 states and 415198 transitions. [2022-01-18 06:23:43,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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 06:23:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 94089 states and 415198 transitions. [2022-01-18 06:23:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 06:23:44,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:44,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:44,059 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 06:23:44,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:44,245 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1583758297, now seen corresponding path program 35 times [2022-01-18 06:23:44,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:44,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761874773] [2022-01-18 06:23:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:44,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:44,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761874773] [2022-01-18 06:23:44,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761874773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103407857] [2022-01-18 06:23:44,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:23:44,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:44,281 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 06:23:44,283 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 06:23:44,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:23:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:44,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 06:23:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:44,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:23:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:23:44,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103407857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:23:44,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:23:44,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-01-18 06:23:44,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230423948] [2022-01-18 06:23:44,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:23:44,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:23:44,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:23:44,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:23:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:23:44,579 INFO L87 Difference]: Start difference. First operand 94089 states and 415198 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:23:48,541 INFO L93 Difference]: Finished difference Result 276005 states and 1136802 transitions. [2022-01-18 06:23:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:23:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 06:23:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:23:51,789 INFO L225 Difference]: With dead ends: 276005 [2022-01-18 06:23:51,789 INFO L226 Difference]: Without dead ends: 264729 [2022-01-18 06:23:51,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=988, Invalid=1982, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 06:23:51,790 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 635 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:23:51,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 187 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:23:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264729 states. [2022-01-18 06:23:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264729 to 119750. [2022-01-18 06:23:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119750 states, 119749 states have (on average 4.421732123023991) internal successors, (529498), 119749 states have internal predecessors, (529498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119750 states to 119750 states and 529498 transitions. [2022-01-18 06:23:58,399 INFO L78 Accepts]: Start accepts. Automaton has 119750 states and 529498 transitions. Word has length 37 [2022-01-18 06:23:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:23:58,399 INFO L470 AbstractCegarLoop]: Abstraction has 119750 states and 529498 transitions. [2022-01-18 06:23:58,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:23:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 119750 states and 529498 transitions. [2022-01-18 06:23:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:23:58,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:23:58,748 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:23:58,763 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 06:23:58,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:58,949 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:23:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:23:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash 903309197, now seen corresponding path program 9 times [2022-01-18 06:23:58,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:23:58,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138673825] [2022-01-18 06:23:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:23:58,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:23:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:23:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:23:59,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:23:59,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138673825] [2022-01-18 06:23:59,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138673825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:23:59,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498372925] [2022-01-18 06:23:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:23:59,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:23:59,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:23:59,087 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 06:23:59,089 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 06:23:59,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:23:59,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:23:59,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:23:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:23:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:23:59,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:23:59,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 96 [2022-01-18 06:24:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:00,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:24:00,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:00,674 INFO L353 Elim1Store]: treesize reduction 20, result has 78.9 percent of original size [2022-01-18 06:24:00,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 51 treesize of output 99 [2022-01-18 06:24:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:01,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498372925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:24:01,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:24:01,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-01-18 06:24:01,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967806740] [2022-01-18 06:24:01,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:24:01,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:24:01,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:24:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:24:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:24:01,877 INFO L87 Difference]: Start difference. First operand 119750 states and 529498 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:24:08,064 INFO L93 Difference]: Finished difference Result 349634 states and 1529888 transitions. [2022-01-18 06:24:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 06:24:08,065 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:24:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:24:11,022 INFO L225 Difference]: With dead ends: 349634 [2022-01-18 06:24:11,023 INFO L226 Difference]: Without dead ends: 348133 [2022-01-18 06:24:11,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1087, Invalid=5719, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 06:24:11,023 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 1077 mSDsluCounter, 5399 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 4628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2828 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:24:11,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 3522 Invalid, 4628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1744 Invalid, 0 Unknown, 2828 Unchecked, 0.8s Time] [2022-01-18 06:24:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348133 states. [2022-01-18 06:24:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348133 to 176430. [2022-01-18 06:24:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176430 states, 176429 states have (on average 4.476004511729931) internal successors, (789697), 176429 states have internal predecessors, (789697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176430 states to 176430 states and 789697 transitions. [2022-01-18 06:24:21,730 INFO L78 Accepts]: Start accepts. Automaton has 176430 states and 789697 transitions. Word has length 39 [2022-01-18 06:24:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:24:21,730 INFO L470 AbstractCegarLoop]: Abstraction has 176430 states and 789697 transitions. [2022-01-18 06:24:21,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 176430 states and 789697 transitions. [2022-01-18 06:24:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:24:22,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:24:22,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:24:22,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 06:24:23,171 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,SelfDestructingSolverStorable46 [2022-01-18 06:24:23,172 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:24:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:24:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash 293793132, now seen corresponding path program 36 times [2022-01-18 06:24:23,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:24:23,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287799959] [2022-01-18 06:24:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:24:23,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:24:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:24:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:23,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:24:23,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287799959] [2022-01-18 06:24:23,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287799959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:24:23,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215383099] [2022-01-18 06:24:23,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:24:23,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:24:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:24:23,302 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 06:24:23,303 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 06:24:23,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:24:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:24:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:24:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:24:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:23,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:23,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:23,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:24:23,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2022-01-18 06:24:23,880 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 30 treesize of output 26 [2022-01-18 06:24:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:23,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:24:24,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:24:24,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 06:24:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:24:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:24:24,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:24:24,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 54 [2022-01-18 06:24:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:24:24,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215383099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:24:24,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:24:24,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-01-18 06:24:24,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613916244] [2022-01-18 06:24:24,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:24:24,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:24:24,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:24:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:24:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:24:24,462 INFO L87 Difference]: Start difference. First operand 176430 states and 789697 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:24:39,220 INFO L93 Difference]: Finished difference Result 528289 states and 2262222 transitions. [2022-01-18 06:24:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-18 06:24:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:24:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:24:44,667 INFO L225 Difference]: With dead ends: 528289 [2022-01-18 06:24:44,668 INFO L226 Difference]: Without dead ends: 526688 [2022-01-18 06:24:44,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10702 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3918, Invalid=25838, Unknown=0, NotChecked=0, Total=29756 [2022-01-18 06:24:44,699 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 1843 mSDsluCounter, 6947 mSDsCounter, 0 mSdLazyCounter, 5912 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 5363 SdHoareTripleChecker+Invalid, 6800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 5912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:24:44,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1843 Valid, 5363 Invalid, 6800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 5912 Invalid, 0 Unknown, 658 Unchecked, 3.0s Time] [2022-01-18 06:24:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526688 states. [2022-01-18 06:24:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526688 to 201404. [2022-01-18 06:24:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201404 states, 201403 states have (on average 4.490662999061583) internal successors, (904433), 201403 states have internal predecessors, (904433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201404 states to 201404 states and 904433 transitions. [2022-01-18 06:24:58,791 INFO L78 Accepts]: Start accepts. Automaton has 201404 states and 904433 transitions. Word has length 39 [2022-01-18 06:24:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:24:58,791 INFO L470 AbstractCegarLoop]: Abstraction has 201404 states and 904433 transitions. [2022-01-18 06:24:58,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:24:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 201404 states and 904433 transitions. [2022-01-18 06:25:00,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:25:00,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:25:00,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:25:00,162 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 06:25:00,351 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,SelfDestructingSolverStorable47 [2022-01-18 06:25:00,351 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:25:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:25:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash -551841914, now seen corresponding path program 37 times [2022-01-18 06:25:00,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:25:00,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746780077] [2022-01-18 06:25:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:25:00,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:25:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:25:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:00,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:25:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746780077] [2022-01-18 06:25:00,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746780077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:25:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208556102] [2022-01-18 06:25:00,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:25:00,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:25:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:25:00,489 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 06:25:00,519 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 06:25:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:25:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:25:00,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:25:00,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-01-18 06:25:01,033 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:25:01,033 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2022-01-18 06:25:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:01,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:25:01,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:25:01,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 06:25:01,356 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:25:01,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:25:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:02,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208556102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:25:02,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:25:02,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:25:02,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835218120] [2022-01-18 06:25:02,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:25:02,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:25:02,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:25:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:25:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:25:02,109 INFO L87 Difference]: Start difference. First operand 201404 states and 904433 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:25:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:25:08,154 INFO L93 Difference]: Finished difference Result 367260 states and 1605104 transitions. [2022-01-18 06:25:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:25:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:25:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:25:10,613 INFO L225 Difference]: With dead ends: 367260 [2022-01-18 06:25:10,613 INFO L226 Difference]: Without dead ends: 366722 [2022-01-18 06:25:10,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=318, Invalid=1938, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 06:25:10,614 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 326 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:25:10,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 2421 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2870 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 06:25:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366722 states. [2022-01-18 06:25:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366722 to 197212. [2022-01-18 06:25:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197212 states, 197211 states have (on average 4.495327339752854) internal successors, (886528), 197211 states have internal predecessors, (886528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:25:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197212 states to 197212 states and 886528 transitions. [2022-01-18 06:25:21,358 INFO L78 Accepts]: Start accepts. Automaton has 197212 states and 886528 transitions. Word has length 39 [2022-01-18 06:25:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:25:21,358 INFO L470 AbstractCegarLoop]: Abstraction has 197212 states and 886528 transitions. [2022-01-18 06:25:21,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:25:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 197212 states and 886528 transitions. [2022-01-18 06:25:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:25:22,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:25:22,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:25:22,671 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 06:25:22,856 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,SelfDestructingSolverStorable48 [2022-01-18 06:25:22,856 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:25:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:25:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1408755014, now seen corresponding path program 38 times [2022-01-18 06:25:22,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:25:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476937164] [2022-01-18 06:25:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:25:22,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:25:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:25:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:23,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:25:23,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476937164] [2022-01-18 06:25:23,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476937164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:25:23,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833759340] [2022-01-18 06:25:23,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:25:23,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:25:23,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:25:23,005 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 06:25:23,006 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 06:25:23,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:25:23,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:25:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:25:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:25:23,472 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 43 treesize of output 35 [2022-01-18 06:25:23,548 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:25:23,548 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2022-01-18 06:25:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:23,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:25:23,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:25:23,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 06:25:23,869 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:25:23,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:25:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:24,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833759340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:25:24,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:25:24,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 06:25:24,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492519778] [2022-01-18 06:25:24,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:25:24,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:25:24,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:25:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:25:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:25:24,306 INFO L87 Difference]: Start difference. First operand 197212 states and 886528 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:25:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:25:30,480 INFO L93 Difference]: Finished difference Result 381935 states and 1670099 transitions. [2022-01-18 06:25:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 06:25:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:25:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:25:33,707 INFO L225 Difference]: With dead ends: 381935 [2022-01-18 06:25:33,707 INFO L226 Difference]: Without dead ends: 381480 [2022-01-18 06:25:33,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=364, Invalid=2086, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 06:25:33,707 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 480 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:25:33,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 1710 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:25:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381480 states. [2022-01-18 06:25:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381480 to 187169. [2022-01-18 06:25:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187169 states, 187168 states have (on average 4.503392673961361) internal successors, (842891), 187168 states have internal predecessors, (842891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:25:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187169 states to 187169 states and 842891 transitions. [2022-01-18 06:25:44,367 INFO L78 Accepts]: Start accepts. Automaton has 187169 states and 842891 transitions. Word has length 39 [2022-01-18 06:25:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:25:44,368 INFO L470 AbstractCegarLoop]: Abstraction has 187169 states and 842891 transitions. [2022-01-18 06:25:44,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:25:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 187169 states and 842891 transitions. [2022-01-18 06:25:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:25:44,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:25:44,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:25:44,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 06:25:45,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:25:45,049 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:25:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:25:45,050 INFO L85 PathProgramCache]: Analyzing trace with hash 51759878, now seen corresponding path program 39 times [2022-01-18 06:25:45,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:25:45,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553357308] [2022-01-18 06:25:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:25:45,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:25:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:25:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:45,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:25:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553357308] [2022-01-18 06:25:45,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553357308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:25:45,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476257321] [2022-01-18 06:25:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:25:45,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:25:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:25:45,189 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 06:25:45,191 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 06:25:45,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 06:25:45,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:25:45,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:25:45,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:25:45,599 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 37 treesize of output 29 [2022-01-18 06:25:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:25:45,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:25:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:25:45,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:25:45,735 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 66 treesize of output 58 [2022-01-18 06:25:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:45,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:25:46,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:25:46,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-01-18 06:25:46,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:25:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:25:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:25:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:25:46,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:25:46,444 INFO L353 Elim1Store]: treesize reduction 14, result has 79.7 percent of original size [2022-01-18 06:25:46,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 80 [2022-01-18 06:25:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:25:46,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476257321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:25:46,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:25:46,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-01-18 06:25:46,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913340261] [2022-01-18 06:25:46,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:25:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:25:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:25:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:25:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:25:46,923 INFO L87 Difference]: Start difference. First operand 187169 states and 842891 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:25:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:25:51,415 INFO L93 Difference]: Finished difference Result 296811 states and 1308102 transitions. [2022-01-18 06:25:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:25:51,416 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:25:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:25:54,033 INFO L225 Difference]: With dead ends: 296811 [2022-01-18 06:25:54,034 INFO L226 Difference]: Without dead ends: 296310 [2022-01-18 06:25:54,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=566, Invalid=3724, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:25:54,034 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1072 mSDsluCounter, 2739 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1380 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:25:54,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 2005 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 991 Invalid, 0 Unknown, 1380 Unchecked, 0.5s Time] [2022-01-18 06:25:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296310 states. [2022-01-18 06:26:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296310 to 196027. [2022-01-18 06:26:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196027 states, 196026 states have (on average 4.501341658759553) internal successors, (882380), 196026 states have internal predecessors, (882380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196027 states to 196027 states and 882380 transitions. [2022-01-18 06:26:04,450 INFO L78 Accepts]: Start accepts. Automaton has 196027 states and 882380 transitions. Word has length 39 [2022-01-18 06:26:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:04,450 INFO L470 AbstractCegarLoop]: Abstraction has 196027 states and 882380 transitions. [2022-01-18 06:26:04,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 196027 states and 882380 transitions. [2022-01-18 06:26:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:26:04,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:04,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:26:04,958 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 06:26:05,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:05,143 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:26:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash 178460348, now seen corresponding path program 40 times [2022-01-18 06:26:05,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:05,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014268877] [2022-01-18 06:26:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:05,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:05,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:05,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014268877] [2022-01-18 06:26:05,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014268877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:05,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661138529] [2022-01-18 06:26:05,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:26:05,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:05,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:05,296 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 06:26:05,296 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 06:26:05,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:26:05,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:26:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:26:05,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:05,657 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:26:05,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2022-01-18 06:26:05,737 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 26 treesize of output 20 [2022-01-18 06:26:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:05,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:05,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:26:05,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 06:26:06,142 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:26:06,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:26:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:07,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661138529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:07,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:07,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:26:07,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136354566] [2022-01-18 06:26:07,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:07,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:26:07,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:26:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:26:07,316 INFO L87 Difference]: Start difference. First operand 196027 states and 882380 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:10,781 INFO L93 Difference]: Finished difference Result 275640 states and 1210739 transitions. [2022-01-18 06:26:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:26:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:26:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:13,150 INFO L225 Difference]: With dead ends: 275640 [2022-01-18 06:26:13,150 INFO L226 Difference]: Without dead ends: 275302 [2022-01-18 06:26:13,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:26:13,150 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 591 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:13,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 1561 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:26:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275302 states. [2022-01-18 06:26:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275302 to 196043. [2022-01-18 06:26:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196043 states, 196042 states have (on average 4.501428265371706) internal successors, (882469), 196042 states have internal predecessors, (882469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196043 states to 196043 states and 882469 transitions. [2022-01-18 06:26:21,822 INFO L78 Accepts]: Start accepts. Automaton has 196043 states and 882469 transitions. Word has length 39 [2022-01-18 06:26:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:21,822 INFO L470 AbstractCegarLoop]: Abstraction has 196043 states and 882469 transitions. [2022-01-18 06:26:21,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 196043 states and 882469 transitions. [2022-01-18 06:26:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:26:23,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:23,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:26:23,101 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 06:26:23,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:23,286 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:26:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:26:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash -596358166, now seen corresponding path program 41 times [2022-01-18 06:26:23,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:26:23,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570393074] [2022-01-18 06:26:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:26:23,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:26:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:26:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:23,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:26:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570393074] [2022-01-18 06:26:23,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570393074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:26:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824035348] [2022-01-18 06:26:23,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:26:23,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:26:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:26:23,426 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 06:26:23,426 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 06:26:23,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:26:23,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:26:23,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:26:23,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:26:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:23,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:26:23,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 103 [2022-01-18 06:26:23,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:26:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:24,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:26:24,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:26:24,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 06:26:24,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:26:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:26:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:26:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:26:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:26:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:26:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:26:24,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2022-01-18 06:26:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:26:24,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824035348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:26:24,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:26:24,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-18 06:26:24,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384530286] [2022-01-18 06:26:24,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:26:24,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:26:24,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:26:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:26:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:26:24,642 INFO L87 Difference]: Start difference. First operand 196043 states and 882469 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:26:37,645 INFO L93 Difference]: Finished difference Result 521919 states and 2213171 transitions. [2022-01-18 06:26:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 06:26:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:26:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:26:42,039 INFO L225 Difference]: With dead ends: 521919 [2022-01-18 06:26:42,039 INFO L226 Difference]: Without dead ends: 521163 [2022-01-18 06:26:42,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7241 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2873, Invalid=18589, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 06:26:42,040 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 1689 mSDsluCounter, 5797 mSDsCounter, 0 mSdLazyCounter, 4483 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 4386 SdHoareTripleChecker+Invalid, 5825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 4483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1155 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:26:42,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 4386 Invalid, 5825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 4483 Invalid, 0 Unknown, 1155 Unchecked, 2.4s Time] [2022-01-18 06:26:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521163 states. [2022-01-18 06:26:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521163 to 222826. [2022-01-18 06:26:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222826 states, 222825 states have (on average 4.510651856838326) internal successors, (1005086), 222825 states have internal predecessors, (1005086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222826 states to 222826 states and 1005086 transitions. [2022-01-18 06:26:59,347 INFO L78 Accepts]: Start accepts. Automaton has 222826 states and 1005086 transitions. Word has length 39 [2022-01-18 06:26:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:26:59,347 INFO L470 AbstractCegarLoop]: Abstraction has 222826 states and 1005086 transitions. [2022-01-18 06:26:59,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:26:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 222826 states and 1005086 transitions. [2022-01-18 06:26:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:26:59,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:26:59,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:26:59,947 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 06:27:00,131 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,SelfDestructingSolverStorable52 [2022-01-18 06:27:00,131 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:27:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:27:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1262321084, now seen corresponding path program 42 times [2022-01-18 06:27:00,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:27:00,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593319244] [2022-01-18 06:27:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:27:00,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:27:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:27:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:00,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:27:00,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593319244] [2022-01-18 06:27:00,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593319244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:27:00,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964310266] [2022-01-18 06:27:00,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:27:00,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:27:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:27:00,288 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 06:27:00,290 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 06:27:00,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:27:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:27:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 06:27:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:27:00,713 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 30 treesize of output 26 [2022-01-18 06:27:00,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:00,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:00,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:27:00,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2022-01-18 06:27:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:00,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:27:00,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:27:00,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 06:27:01,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:01,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:01,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:01,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:01,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:01,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:27:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:27:01,850 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-01-18 06:27:01,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 34 [2022-01-18 06:27:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:01,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964310266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:27:01,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:27:01,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-01-18 06:27:01,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651848973] [2022-01-18 06:27:01,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:27:01,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:27:01,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:27:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:27:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:27:01,893 INFO L87 Difference]: Start difference. First operand 222826 states and 1005086 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:27:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:27:13,745 INFO L93 Difference]: Finished difference Result 600174 states and 2578725 transitions. [2022-01-18 06:27:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 06:27:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:27:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:27:18,790 INFO L225 Difference]: With dead ends: 600174 [2022-01-18 06:27:18,791 INFO L226 Difference]: Without dead ends: 599362 [2022-01-18 06:27:18,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4701 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2112, Invalid=11694, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 06:27:18,791 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 1659 mSDsluCounter, 3628 mSDsCounter, 0 mSdLazyCounter, 2982 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 3401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:27:18,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 2825 Invalid, 3401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2982 Invalid, 0 Unknown, 156 Unchecked, 1.6s Time] [2022-01-18 06:27:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599362 states. [2022-01-18 06:27:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599362 to 256130. [2022-01-18 06:27:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256130 states, 256129 states have (on average 4.509840744312436) internal successors, (1155101), 256129 states have internal predecessors, (1155101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:27:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256130 states to 256130 states and 1155101 transitions. [2022-01-18 06:27:35,764 INFO L78 Accepts]: Start accepts. Automaton has 256130 states and 1155101 transitions. Word has length 39 [2022-01-18 06:27:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:27:35,765 INFO L470 AbstractCegarLoop]: Abstraction has 256130 states and 1155101 transitions. [2022-01-18 06:27:35,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:27:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 256130 states and 1155101 transitions. [2022-01-18 06:27:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:27:37,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:27:37,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:27:37,191 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 06:27:37,373 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,SelfDestructingSolverStorable53 [2022-01-18 06:27:37,373 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:27:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:27:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash 396606536, now seen corresponding path program 43 times [2022-01-18 06:27:37,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:27:37,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325632729] [2022-01-18 06:27:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:27:37,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:27:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:27:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:37,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:27:37,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325632729] [2022-01-18 06:27:37,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325632729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:27:37,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700633386] [2022-01-18 06:27:37,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:27:37,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:27:37,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:27:37,502 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 06:27:37,502 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 06:27:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:27:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:27:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:27:37,955 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 48 treesize of output 40 [2022-01-18 06:27:37,990 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:27:37,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2022-01-18 06:27:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:38,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:27:38,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:27:38,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:27:38,319 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:27:38,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:27:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:27:38,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700633386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:27:38,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:27:38,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:27:38,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914124435] [2022-01-18 06:27:38,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:27:38,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:27:38,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:27:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:27:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:27:38,986 INFO L87 Difference]: Start difference. First operand 256130 states and 1155101 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:27:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:27:45,457 INFO L93 Difference]: Finished difference Result 423447 states and 1861975 transitions. [2022-01-18 06:27:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:27:45,458 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:27:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:27:49,089 INFO L225 Difference]: With dead ends: 423447 [2022-01-18 06:27:49,089 INFO L226 Difference]: Without dead ends: 423182 [2022-01-18 06:27:49,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:27:49,090 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 441 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:27:49,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 1713 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:27:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423182 states. [2022-01-18 06:28:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423182 to 255148. [2022-01-18 06:28:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255148 states, 255147 states have (on average 4.513061098112069) internal successors, (1151494), 255147 states have internal predecessors, (1151494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255148 states to 255148 states and 1151494 transitions. [2022-01-18 06:28:04,067 INFO L78 Accepts]: Start accepts. Automaton has 255148 states and 1151494 transitions. Word has length 39 [2022-01-18 06:28:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:28:04,067 INFO L470 AbstractCegarLoop]: Abstraction has 255148 states and 1151494 transitions. [2022-01-18 06:28:04,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 255148 states and 1151494 transitions. [2022-01-18 06:28:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:28:05,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:28:05,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:28:05,291 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 06:28:05,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:05,488 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:28:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:28:05,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1937763832, now seen corresponding path program 44 times [2022-01-18 06:28:05,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:28:05,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366820095] [2022-01-18 06:28:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:28:05,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:28:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:05,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:28:05,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366820095] [2022-01-18 06:28:05,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366820095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:28:05,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633708036] [2022-01-18 06:28:05,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:28:05,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:05,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:28:05,686 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 06:28:05,687 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 06:28:05,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:28:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:28:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:28:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:28:06,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-18 06:28:06,319 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:28:06,319 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2022-01-18 06:28:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:06,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:28:06,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:28:06,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 06:28:07,421 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:28:07,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:28:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:08,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633708036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:28:08,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:28:08,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 06:28:08,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966813640] [2022-01-18 06:28:08,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:28:08,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:28:08,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:28:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:28:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:28:08,075 INFO L87 Difference]: Start difference. First operand 255148 states and 1151494 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:28:14,390 INFO L93 Difference]: Finished difference Result 422590 states and 1861215 transitions. [2022-01-18 06:28:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:28:14,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:28:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:28:18,012 INFO L225 Difference]: With dead ends: 422590 [2022-01-18 06:28:18,012 INFO L226 Difference]: Without dead ends: 422309 [2022-01-18 06:28:18,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:28:18,012 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 531 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:28:18,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 1668 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:28:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422309 states. [2022-01-18 06:28:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422309 to 255364. [2022-01-18 06:28:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255364 states, 255363 states have (on average 4.512517475123648) internal successors, (1152330), 255363 states have internal predecessors, (1152330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255364 states to 255364 states and 1152330 transitions. [2022-01-18 06:28:32,038 INFO L78 Accepts]: Start accepts. Automaton has 255364 states and 1152330 transitions. Word has length 39 [2022-01-18 06:28:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:28:32,039 INFO L470 AbstractCegarLoop]: Abstraction has 255364 states and 1152330 transitions. [2022-01-18 06:28:32,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 255364 states and 1152330 transitions. [2022-01-18 06:28:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:28:32,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:28:32,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:28:32,841 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 06:28:33,025 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,SelfDestructingSolverStorable55 [2022-01-18 06:28:33,025 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:28:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:28:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2008211100, now seen corresponding path program 45 times [2022-01-18 06:28:33,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:28:33,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778615920] [2022-01-18 06:28:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:28:33,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:28:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:28:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:33,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:28:33,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778615920] [2022-01-18 06:28:33,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778615920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:28:33,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766985638] [2022-01-18 06:28:33,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:28:33,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:28:33,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:28:33,175 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 06:28:33,176 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 06:28:33,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:28:33,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:28:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:28:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:28:33,624 INFO L353 Elim1Store]: treesize reduction 14, result has 77.0 percent of original size [2022-01-18 06:28:33,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 83 [2022-01-18 06:28:33,856 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 17 treesize of output 13 [2022-01-18 06:28:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:33,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:28:34,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:28:34,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-01-18 06:28:35,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:28:35,148 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-01-18 06:28:35,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 42 treesize of output 98 [2022-01-18 06:28:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:28:35,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766985638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:28:35,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:28:35,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-18 06:28:35,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648980126] [2022-01-18 06:28:35,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:28:35,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:28:35,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:28:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:28:35,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:28:35,353 INFO L87 Difference]: Start difference. First operand 255364 states and 1152330 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:28:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:28:43,239 INFO L93 Difference]: Finished difference Result 467878 states and 2082044 transitions. [2022-01-18 06:28:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 06:28:43,240 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:28:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:28:47,337 INFO L225 Difference]: With dead ends: 467878 [2022-01-18 06:28:47,337 INFO L226 Difference]: Without dead ends: 467781 [2022-01-18 06:28:47,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=692, Invalid=5160, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:28:47,338 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 730 mSDsluCounter, 3880 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 3736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1707 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:28:47,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 3396 Invalid, 3736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1972 Invalid, 0 Unknown, 1707 Unchecked, 0.9s Time] [2022-01-18 06:28:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467781 states. [2022-01-18 06:28:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467781 to 299195. [2022-01-18 06:29:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299195 states, 299194 states have (on average 4.533647065114942) internal successors, (1356440), 299194 states have internal predecessors, (1356440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299195 states to 299195 states and 1356440 transitions. [2022-01-18 06:29:05,099 INFO L78 Accepts]: Start accepts. Automaton has 299195 states and 1356440 transitions. Word has length 39 [2022-01-18 06:29:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:29:05,115 INFO L470 AbstractCegarLoop]: Abstraction has 299195 states and 1356440 transitions. [2022-01-18 06:29:05,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 299195 states and 1356440 transitions. [2022-01-18 06:29:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:29:06,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:29:06,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:29:06,752 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 06:29:06,947 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,SelfDestructingSolverStorable56 [2022-01-18 06:29:06,947 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:29:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:29:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash 981146016, now seen corresponding path program 46 times [2022-01-18 06:29:06,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:29:06,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510608951] [2022-01-18 06:29:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:29:06,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:29:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:29:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:07,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:29:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510608951] [2022-01-18 06:29:07,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510608951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:29:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904118251] [2022-01-18 06:29:07,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:29:07,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:07,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:29:07,116 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 06:29:07,179 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 06:29:07,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:29:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:29:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:29:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:29:07,731 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:29:07,732 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2022-01-18 06:29:07,775 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 17 treesize of output 13 [2022-01-18 06:29:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:07,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:29:07,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:07,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 06:29:08,161 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:29:08,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:29:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:08,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904118251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:29:08,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:29:08,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:29:08,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886892699] [2022-01-18 06:29:08,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:29:08,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:29:08,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:29:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:29:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:29:08,725 INFO L87 Difference]: Start difference. First operand 299195 states and 1356440 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:29:16,761 INFO L93 Difference]: Finished difference Result 462447 states and 2052343 transitions. [2022-01-18 06:29:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:29:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:29:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:29:20,050 INFO L225 Difference]: With dead ends: 462447 [2022-01-18 06:29:20,050 INFO L226 Difference]: Without dead ends: 462218 [2022-01-18 06:29:20,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:29:20,051 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 423 mSDsluCounter, 3716 mSDsCounter, 0 mSdLazyCounter, 3436 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:29:20,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 2908 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3436 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 06:29:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462218 states. [2022-01-18 06:29:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462218 to 285184. [2022-01-18 06:29:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285184 states, 285183 states have (on average 4.522201533752012) internal successors, (1289655), 285183 states have internal predecessors, (1289655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285184 states to 285184 states and 1289655 transitions. [2022-01-18 06:29:36,285 INFO L78 Accepts]: Start accepts. Automaton has 285184 states and 1289655 transitions. Word has length 39 [2022-01-18 06:29:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:29:36,285 INFO L470 AbstractCegarLoop]: Abstraction has 285184 states and 1289655 transitions. [2022-01-18 06:29:36,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 285184 states and 1289655 transitions. [2022-01-18 06:29:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:29:37,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:29:37,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:29:37,849 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 06:29:38,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:38,048 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:29:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:29:38,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1620793278, now seen corresponding path program 47 times [2022-01-18 06:29:38,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:29:38,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259407334] [2022-01-18 06:29:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:29:38,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:29:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:29:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:38,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:29:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259407334] [2022-01-18 06:29:38,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259407334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:29:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924873164] [2022-01-18 06:29:38,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:29:38,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:29:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:29:38,203 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 06:29:38,204 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 06:29:38,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:29:38,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:29:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:29:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:29:38,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-01-18 06:29:38,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:29:38,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:29:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:29:38,946 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2022-01-18 06:29:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:38,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:29:39,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:39,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-01-18 06:29:39,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:39,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:39,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:39,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:39,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:39,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:39,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:29:39,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:29:39,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 100 [2022-01-18 06:29:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:29:39,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924873164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:29:39,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:29:39,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 06:29:39,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60272802] [2022-01-18 06:29:39,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:29:39,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:29:39,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:29:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:29:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:29:39,773 INFO L87 Difference]: Start difference. First operand 285184 states and 1289655 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:29:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:29:43,873 INFO L93 Difference]: Finished difference Result 321032 states and 1436979 transitions. [2022-01-18 06:29:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:29:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:29:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:29:46,653 INFO L225 Difference]: With dead ends: 321032 [2022-01-18 06:29:46,654 INFO L226 Difference]: Without dead ends: 320951 [2022-01-18 06:29:46,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:29:46,654 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 505 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:29:46,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 1456 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 666 Invalid, 0 Unknown, 1216 Unchecked, 0.3s Time] [2022-01-18 06:29:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320951 states. [2022-01-18 06:29:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320951 to 289377. [2022-01-18 06:29:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289377 states, 289376 states have (on average 4.521843553024439) internal successors, (1308513), 289376 states have internal predecessors, (1308513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289377 states to 289377 states and 1308513 transitions. [2022-01-18 06:30:03,608 INFO L78 Accepts]: Start accepts. Automaton has 289377 states and 1308513 transitions. Word has length 39 [2022-01-18 06:30:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:30:03,608 INFO L470 AbstractCegarLoop]: Abstraction has 289377 states and 1308513 transitions. [2022-01-18 06:30:03,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 289377 states and 1308513 transitions. [2022-01-18 06:30:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:30:04,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:30:04,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:30:04,891 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 06:30:05,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:05,069 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:30:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:30:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1832562018, now seen corresponding path program 48 times [2022-01-18 06:30:05,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:30:05,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70469723] [2022-01-18 06:30:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:30:05,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:30:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:30:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:30:05,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:30:05,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70469723] [2022-01-18 06:30:05,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70469723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:30:05,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679004774] [2022-01-18 06:30:05,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:30:05,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:05,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:30:05,201 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 06:30:05,201 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 06:30:05,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:30:05,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:30:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:30:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:30:05,656 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 46 treesize of output 38 [2022-01-18 06:30:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:30:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:30:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:30:05,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:05,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-01-18 06:30:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:30:05,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:30:06,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:06,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-01-18 06:30:06,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:30:06,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:30:06,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:30:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:30:06,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:06,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 42 treesize of output 70 [2022-01-18 06:30:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:30:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679004774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:30:06,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:30:06,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-01-18 06:30:06,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600546399] [2022-01-18 06:30:06,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:30:06,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:30:06,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:30:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:30:06,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:30:06,816 INFO L87 Difference]: Start difference. First operand 289377 states and 1308513 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:30:19,113 INFO L93 Difference]: Finished difference Result 571579 states and 2504703 transitions. [2022-01-18 06:30:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 06:30:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:30:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:30:24,512 INFO L225 Difference]: With dead ends: 571579 [2022-01-18 06:30:24,512 INFO L226 Difference]: Without dead ends: 571050 [2022-01-18 06:30:24,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4478 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2231, Invalid=11341, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 06:30:24,513 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1123 mSDsluCounter, 5553 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 3903 SdHoareTripleChecker+Invalid, 6711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4162 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:30:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 3903 Invalid, 6711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2423 Invalid, 0 Unknown, 4162 Unchecked, 1.4s Time] [2022-01-18 06:30:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571050 states. [2022-01-18 06:30:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571050 to 317313. [2022-01-18 06:30:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317313 states, 317312 states have (on average 4.52333350141186) internal successors, (1435308), 317312 states have internal predecessors, (1435308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317313 states to 317313 states and 1435308 transitions. [2022-01-18 06:30:43,880 INFO L78 Accepts]: Start accepts. Automaton has 317313 states and 1435308 transitions. Word has length 39 [2022-01-18 06:30:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:30:43,881 INFO L470 AbstractCegarLoop]: Abstraction has 317313 states and 1435308 transitions. [2022-01-18 06:30:43,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 29 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 317313 states and 1435308 transitions. [2022-01-18 06:30:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:30:45,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:30:45,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:30:45,584 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 06:30:45,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 06:30:45,769 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:30:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:30:45,769 INFO L85 PathProgramCache]: Analyzing trace with hash -713577090, now seen corresponding path program 49 times [2022-01-18 06:30:45,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:30:45,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626028286] [2022-01-18 06:30:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:30:45,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:30:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:30:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:30:45,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:30:45,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626028286] [2022-01-18 06:30:45,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626028286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:30:45,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912577752] [2022-01-18 06:30:45,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:30:45,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:30:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:30:45,897 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 06:30:45,897 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 06:30:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:30:45,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:30:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:30:46,324 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 43 treesize of output 35 [2022-01-18 06:30:46,400 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:30:46,400 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2022-01-18 06:30:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:30:46,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:30:46,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:30:46,537 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 28 treesize of output 32 [2022-01-18 06:30:46,709 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:30:46,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:30:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:30:47,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912577752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:30:47,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:30:47,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 06:30:47,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935601107] [2022-01-18 06:30:47,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:30:47,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:30:47,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:30:47,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:30:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:30:47,276 INFO L87 Difference]: Start difference. First operand 317313 states and 1435308 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:30:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:30:55,451 INFO L93 Difference]: Finished difference Result 462502 states and 2044141 transitions. [2022-01-18 06:30:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 06:30:55,451 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 06:30:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:31:02,664 INFO L225 Difference]: With dead ends: 462502 [2022-01-18 06:31:02,664 INFO L226 Difference]: Without dead ends: 462253 [2022-01-18 06:31:02,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=2534, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 06:31:02,665 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 579 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:02,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 1968 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:31:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462253 states. [2022-01-18 06:31:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462253 to 314065. [2022-01-18 06:31:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314065 states, 314064 states have (on average 4.524565056803709) internal successors, (1421003), 314064 states have internal predecessors, (1421003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314065 states to 314065 states and 1421003 transitions. [2022-01-18 06:31:19,952 INFO L78 Accepts]: Start accepts. Automaton has 314065 states and 1421003 transitions. Word has length 39 [2022-01-18 06:31:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:31:19,952 INFO L470 AbstractCegarLoop]: Abstraction has 314065 states and 1421003 transitions. [2022-01-18 06:31:19,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:31:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 314065 states and 1421003 transitions. [2022-01-18 06:31:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 06:31:21,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:31:21,523 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 06:31:21,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 06:31:21,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:21,739 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 06:31:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:31:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash 603433210, now seen corresponding path program 50 times [2022-01-18 06:31:21,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:31:21,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829136207] [2022-01-18 06:31:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:31:21,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:31:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:31:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:21,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:31:21,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829136207] [2022-01-18 06:31:21,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829136207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:31:21,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406652211] [2022-01-18 06:31:21,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:31:21,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:31:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:31:21,868 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 06:31:21,869 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 06:31:21,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:31:21,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:31:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:31:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:31:22,370 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 48 treesize of output 40 [2022-01-18 06:31:22,405 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-18 06:31:22,405 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 25 [2022-01-18 06:31:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:22,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:31:22,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:31:22,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-18 06:31:22,700 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-01-18 06:31:22,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 45 treesize of output 109 [2022-01-18 06:31:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:31:23,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406652211] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:31:23,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:31:23,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:31:23,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976032926] [2022-01-18 06:31:23,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:31:23,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:31:23,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:31:23,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:31:23,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:31:23,141 INFO L87 Difference]: Start difference. First operand 314065 states and 1421003 transitions. Second operand has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 06:31:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:31:25,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=2311, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:31:25,679 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 434 mSDsluCounter, 2740 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:31:25,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 2275 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:31:25,680 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-01-18 06:31:25,690 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 06:31:25,697 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 06:31:25,712 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:31:25,881 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,SelfDestructingSolverStorable61 [2022-01-18 06:31:25,883 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (314065states) and FLOYD_HOARE automaton (currently 37 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (111046 states constructed, input type IntersectNwa). [2022-01-18 06:31:25,884 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-01-18 06:31:25,885 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-01-18 06:31:25,885 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-01-18 06:31:25,885 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-01-18 06:31:25,890 INFO L732 BasicCegarLoop]: Path program histogram: [50, 9, 1, 1, 1] [2022-01-18 06:31:25,902 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:31:25,902 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:31:25,903 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:31:25 BasicIcfg [2022-01-18 06:31:25,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:31:25,904 INFO L158 Benchmark]: Toolchain (without parser) took 597460.20ms. Allocated memory was 367.0MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 329.5MB in the beginning and 11.2GB in the end (delta: -10.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2022-01-18 06:31:25,904 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 367.0MB. Free memory was 330.8MB in the beginning and 330.6MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:31:25,904 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.39ms. Allocated memory is still 367.0MB. Free memory was 329.4MB in the beginning and 328.0MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 06:31:25,904 INFO L158 Benchmark]: Boogie Preprocessor took 12.43ms. Allocated memory is still 367.0MB. Free memory was 328.0MB in the beginning and 326.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:31:25,904 INFO L158 Benchmark]: RCFGBuilder took 249.06ms. Allocated memory is still 367.0MB. Free memory was 326.8MB in the beginning and 316.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 06:31:25,904 INFO L158 Benchmark]: TraceAbstraction took 597155.57ms. Allocated memory was 367.0MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 316.2MB in the beginning and 11.2GB in the end (delta: -10.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2022-01-18 06:31:25,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 367.0MB. Free memory was 330.8MB in the beginning and 330.6MB in the end (delta: 162.3kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.39ms. Allocated memory is still 367.0MB. Free memory was 329.4MB in the beginning and 328.0MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 12.43ms. Allocated memory is still 367.0MB. Free memory was 328.0MB in the beginning and 326.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 249.06ms. Allocated memory is still 367.0MB. Free memory was 326.8MB in the beginning and 316.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 597155.57ms. Allocated memory was 367.0MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 316.2MB in the beginning and 11.2GB in the end (delta: -10.9GB). Peak memory consumption was 4.7GB. 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: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (314065states) and FLOYD_HOARE automaton (currently 37 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (111046 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (314065states) and FLOYD_HOARE automaton (currently 37 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (111046 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (314065states) and FLOYD_HOARE automaton (currently 37 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (111046 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (314065states) and FLOYD_HOARE automaton (currently 37 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (111046 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (314065states) and FLOYD_HOARE automaton (currently 37 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (111046 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 597.0s, OverallIterations: 62, TraceHistogramMax: 4, PathProgramHistogramMax: 50, EmptinessCheckTime: 21.2s, AutomataDifference: 237.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31680 SdHoareTripleChecker+Valid, 33.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31680 mSDsluCounter, 76515 SdHoareTripleChecker+Invalid, 27.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 22816 IncrementalHoareTripleChecker+Unchecked, 99465 mSDsCounter, 2525 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 70388 IncrementalHoareTripleChecker+Invalid, 95729 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2525 mSolverCounterUnsat, 6605 mSDtfsCounter, 70388 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5971 GetRequests, 3345 SyntacticMatches, 179 SemanticMatches, 2447 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 46980 ImplicationChecksByTransitivity, 55.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=317313occurred in iteration=60, InterpolantAutomatonStates: 1918, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 263.8s AutomataMinimizationTime, 61 MinimizatonAttempts, 3711712 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 59.1s InterpolantComputationTime, 4120 NumberOfCodeBlocks, 4120 NumberOfCodeBlocksAsserted, 207 NumberOfCheckSat, 5926 ConstructedInterpolants, 381 QuantifiedInterpolants, 84077 SizeOfPredicates, 385 NumberOfNonLiveVariables, 6233 ConjunctsInSsa, 1137 ConjunctsInUnsatCore, 177 InterpolantComputations, 5 PerfectInterpolantSequences, 309/2561 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