/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 05:23:26,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 05:23:26,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 05:23:26,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 05:23:26,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 05:23:26,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 05:23:26,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 05:23:26,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 05:23:26,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 05:23:26,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 05:23:26,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 05:23:26,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 05:23:26,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 05:23:26,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 05:23:26,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 05:23:26,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 05:23:26,783 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 05:23:26,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 05:23:26,785 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 05:23:26,785 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 05:23:26,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 05:23:26,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 05:23:26,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 05:23:26,786 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 05:23:26,786 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 05:23:26,786 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 05:23:26,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 05:23:26,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 05:23:26,787 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 05:23:26,787 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 05:23:26,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 05:23:26,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 05:23:26,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 05:23:26,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:23:26,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 05:23:26,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 05:23:26,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 05:23:26,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 05:23:26,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 05:23:27,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 05:23:27,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 05:23:27,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 05:23:27,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 05:23:27,199 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 05:23:27,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2022-10-16 05:23:27,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0741a0559/1e33e9a754c34bd492e00c97b6bf8c41/FLAG3db788063 [2022-10-16 05:23:27,878 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 05:23:27,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2022-10-16 05:23:27,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0741a0559/1e33e9a754c34bd492e00c97b6bf8c41/FLAG3db788063 [2022-10-16 05:23:28,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0741a0559/1e33e9a754c34bd492e00c97b6bf8c41 [2022-10-16 05:23:28,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 05:23:28,292 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 05:23:28,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 05:23:28,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 05:23:28,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 05:23:28,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b11a90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28, skipping insertion in model container [2022-10-16 05:23:28,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 05:23:28,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 05:23:28,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2022-10-16 05:23:28,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:23:28,598 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 05:23:28,618 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2022-10-16 05:23:28,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 05:23:28,650 INFO L208 MainTranslator]: Completed translation [2022-10-16 05:23:28,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28 WrapperNode [2022-10-16 05:23:28,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 05:23:28,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 05:23:28,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 05:23:28,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 05:23:28,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,691 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-10-16 05:23:28,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 05:23:28,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 05:23:28,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 05:23:28,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 05:23:28,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,718 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 05:23:28,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 05:23:28,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 05:23:28,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 05:23:28,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (1/1) ... [2022-10-16 05:23:28,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 05:23:28,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:28,760 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) [2022-10-16 05:23:28,774 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 [2022-10-16 05:23:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 05:23:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 05:23:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 05:23:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 05:23:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 05:23:28,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 05:23:28,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 05:23:28,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 05:23:28,902 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 05:23:28,904 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 05:23:29,192 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 05:23:29,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 05:23:29,201 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-16 05:23:29,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:23:29 BoogieIcfgContainer [2022-10-16 05:23:29,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 05:23:29,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 05:23:29,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 05:23:29,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 05:23:29,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:23:28" (1/3) ... [2022-10-16 05:23:29,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16573cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:23:29, skipping insertion in model container [2022-10-16 05:23:29,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:23:28" (2/3) ... [2022-10-16 05:23:29,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16573cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:23:29, skipping insertion in model container [2022-10-16 05:23:29,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:23:29" (3/3) ... [2022-10-16 05:23:29,218 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2022-10-16 05:23:29,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 05:23:29,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-16 05:23:29,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 05:23:29,376 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66eca75a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 05:23:29,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-16 05:23:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:23:29,406 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:29,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:23:29,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-16 05:23:29,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:29,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902674375] [2022-10-16 05:23:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:29,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:29,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:29,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902674375] [2022-10-16 05:23:29,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902674375] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:23:29,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:23:29,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:23:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586634434] [2022-10-16 05:23:29,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:23:29,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:23:29,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:23:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:23:29,878 INFO L87 Difference]: Start difference. First operand has 43 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:29,993 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-10-16 05:23:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:23:29,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 05:23:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:30,005 INFO L225 Difference]: With dead ends: 41 [2022-10-16 05:23:30,006 INFO L226 Difference]: Without dead ends: 39 [2022-10-16 05:23:30,008 INFO L412 NwaCegarLoop]: 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 [2022-10-16 05:23:30,013 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:30,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 32 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:23:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-16 05:23:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-10-16 05:23:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-10-16 05:23:30,052 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 4 [2022-10-16 05:23:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:30,053 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-10-16 05:23:30,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-10-16 05:23:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 05:23:30,054 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:30,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 05:23:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 05:23:30,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-16 05:23:30,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:30,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091211809] [2022-10-16 05:23:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091211809] [2022-10-16 05:23:30,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091211809] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:23:30,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:23:30,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:23:30,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191206422] [2022-10-16 05:23:30,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:23:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:23:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:23:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:23:30,206 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:30,258 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-10-16 05:23:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:23:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 05:23:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:30,260 INFO L225 Difference]: With dead ends: 42 [2022-10-16 05:23:30,260 INFO L226 Difference]: Without dead ends: 42 [2022-10-16 05:23:30,261 INFO L412 NwaCegarLoop]: 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 [2022-10-16 05:23:30,262 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:30,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:23:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-16 05:23:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-10-16 05:23:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 40 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) [2022-10-16 05:23:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-10-16 05:23:30,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 4 [2022-10-16 05:23:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:30,271 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-10-16 05:23:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-10-16 05:23:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 05:23:30,272 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:30,273 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-16 05:23:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 05:23:30,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-16 05:23:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:30,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256646126] [2022-10-16 05:23:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:30,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256646126] [2022-10-16 05:23:30,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256646126] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746666327] [2022-10-16 05:23:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:30,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:30,517 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) [2022-10-16 05:23:30,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 05:23:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-16 05:23:30,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:30,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:23:30,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:23:30,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:23:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:30,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:23:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:30,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746666327] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:23:30,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:23:30,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-16 05:23:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889767834] [2022-10-16 05:23:30,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:23:30,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:23:30,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:23:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 05:23:30,885 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2022-10-16 05:23:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:31,021 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-10-16 05:23:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 05:23:31,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 7 [2022-10-16 05:23:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:31,024 INFO L225 Difference]: With dead ends: 52 [2022-10-16 05:23:31,024 INFO L226 Difference]: Without dead ends: 52 [2022-10-16 05:23:31,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-16 05:23:31,027 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:31,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:23:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-16 05:23:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-10-16 05:23:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-10-16 05:23:31,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 7 [2022-10-16 05:23:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:31,037 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-10-16 05:23:31,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2022-10-16 05:23:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-10-16 05:23:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-16 05:23:31,038 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:31,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:31,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:31,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:31,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash -65957040, now seen corresponding path program 1 times [2022-10-16 05:23:31,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383946496] [2022-10-16 05:23:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:31,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 05:23:31,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:31,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383946496] [2022-10-16 05:23:31,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383946496] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127757131] [2022-10-16 05:23:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:31,373 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) [2022-10-16 05:23:31,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 05:23:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-16 05:23:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:31,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:23:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:31,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127757131] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:23:31,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:23:31,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-10-16 05:23:31,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945923186] [2022-10-16 05:23:31,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:23:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 05:23:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 05:23:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-10-16 05:23:31,530 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2022-10-16 05:23:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:31,846 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2022-10-16 05:23:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 05:23:31,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 12 [2022-10-16 05:23:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:31,849 INFO L225 Difference]: With dead ends: 142 [2022-10-16 05:23:31,849 INFO L226 Difference]: Without dead ends: 142 [2022-10-16 05:23:31,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-10-16 05:23:31,852 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 272 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:31,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 90 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:23:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-10-16 05:23:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2022-10-16 05:23:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 95 states have (on average 1.5263157894736843) internal successors, (145), 106 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 145 transitions. [2022-10-16 05:23:31,865 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 145 transitions. Word has length 12 [2022-10-16 05:23:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:31,866 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 145 transitions. [2022-10-16 05:23:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2022-10-16 05:23:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 145 transitions. [2022-10-16 05:23:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-16 05:23:31,867 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:31,867 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-16 05:23:31,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:32,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-16 05:23:32,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash -278008218, now seen corresponding path program 2 times [2022-10-16 05:23:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:32,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041274415] [2022-10-16 05:23:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:32,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041274415] [2022-10-16 05:23:32,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041274415] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677690885] [2022-10-16 05:23:32,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:23:32,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:32,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:32,427 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) [2022-10-16 05:23:32,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 05:23:32,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:23:32,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:23:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 05:23:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:23:32,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:23:32,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:23:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:32,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:23:32,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677690885] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:23:32,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:23:32,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-16 05:23:32,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121695632] [2022-10-16 05:23:32,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:23:32,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 05:23:32,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:32,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 05:23:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:23:32,732 INFO L87 Difference]: Start difference. First operand 107 states and 145 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:32,932 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2022-10-16 05:23:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 05:23:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-16 05:23:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:32,933 INFO L225 Difference]: With dead ends: 130 [2022-10-16 05:23:32,934 INFO L226 Difference]: Without dead ends: 130 [2022-10-16 05:23:32,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-16 05:23:32,935 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 116 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:32,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 102 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 05:23:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-10-16 05:23:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2022-10-16 05:23:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 95 states have (on average 1.4842105263157894) internal successors, (141), 105 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2022-10-16 05:23:32,945 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 16 [2022-10-16 05:23:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:32,946 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-10-16 05:23:32,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2022-10-16 05:23:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 05:23:32,947 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:32,947 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:32,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:33,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1968650094, now seen corresponding path program 1 times [2022-10-16 05:23:33,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:33,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238983711] [2022-10-16 05:23:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:33,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-16 05:23:33,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238983711] [2022-10-16 05:23:33,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238983711] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:23:33,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 05:23:33,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 05:23:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606684765] [2022-10-16 05:23:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:23:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 05:23:33,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 05:23:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 05:23:33,230 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:33,247 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-10-16 05:23:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 05:23:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-16 05:23:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:33,248 INFO L225 Difference]: With dead ends: 102 [2022-10-16 05:23:33,249 INFO L226 Difference]: Without dead ends: 102 [2022-10-16 05:23:33,249 INFO L412 NwaCegarLoop]: 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 [2022-10-16 05:23:33,250 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:33,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:23:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-10-16 05:23:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-10-16 05:23:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 101 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2022-10-16 05:23:33,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 25 [2022-10-16 05:23:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:33,272 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2022-10-16 05:23:33,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2022-10-16 05:23:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 05:23:33,273 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:33,273 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:33,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 05:23:33,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1968650093, now seen corresponding path program 1 times [2022-10-16 05:23:33,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397719225] [2022-10-16 05:23:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:33,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:33,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397719225] [2022-10-16 05:23:33,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397719225] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295290315] [2022-10-16 05:23:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:33,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:33,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:33,403 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) [2022-10-16 05:23:33,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 05:23:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:23:33,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:33,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:23:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:33,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295290315] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:23:33,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:23:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-16 05:23:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445441636] [2022-10-16 05:23:33,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:23:33,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 05:23:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 05:23:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:23:33,621 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:33,930 INFO L93 Difference]: Finished difference Result 247 states and 250 transitions. [2022-10-16 05:23:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 05:23:33,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-16 05:23:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:33,932 INFO L225 Difference]: With dead ends: 247 [2022-10-16 05:23:33,932 INFO L226 Difference]: Without dead ends: 247 [2022-10-16 05:23:33,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-16 05:23:33,934 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 434 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:33,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 78 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 05:23:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-10-16 05:23:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 206. [2022-10-16 05:23:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.256281407035176) internal successors, (250), 205 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 250 transitions. [2022-10-16 05:23:33,946 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 250 transitions. Word has length 25 [2022-10-16 05:23:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:33,947 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 250 transitions. [2022-10-16 05:23:33,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 250 transitions. [2022-10-16 05:23:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-16 05:23:33,948 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:33,949 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:33,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-10-16 05:23:34,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:34,165 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash 556248211, now seen corresponding path program 2 times [2022-10-16 05:23:34,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:34,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176789768] [2022-10-16 05:23:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 05:23:34,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:34,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176789768] [2022-10-16 05:23:34,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176789768] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:34,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965889939] [2022-10-16 05:23:34,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:23:34,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:34,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:34,503 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) [2022-10-16 05:23:34,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 05:23:34,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:23:34,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:23:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 05:23:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:34,614 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:23:34,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 05:23:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-10-16 05:23:34,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:23:34,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965889939] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:23:34,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:23:34,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2022-10-16 05:23:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326897889] [2022-10-16 05:23:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:23:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 05:23:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 05:23:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-10-16 05:23:34,798 INFO L87 Difference]: Start difference. First operand 206 states and 250 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:34,841 INFO L93 Difference]: Finished difference Result 206 states and 247 transitions. [2022-10-16 05:23:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 05:23:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-10-16 05:23:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:34,843 INFO L225 Difference]: With dead ends: 206 [2022-10-16 05:23:34,843 INFO L226 Difference]: Without dead ends: 206 [2022-10-16 05:23:34,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-10-16 05:23:34,845 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:34,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 05:23:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-10-16 05:23:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-10-16 05:23:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.2412060301507537) internal successors, (247), 205 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 247 transitions. [2022-10-16 05:23:34,854 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 247 transitions. Word has length 49 [2022-10-16 05:23:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:34,855 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 247 transitions. [2022-10-16 05:23:34,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 247 transitions. [2022-10-16 05:23:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-16 05:23:34,857 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:34,857 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:34,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:35,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:35,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:35,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1250100426, now seen corresponding path program 1 times [2022-10-16 05:23:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:35,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010485344] [2022-10-16 05:23:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:23:35,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010485344] [2022-10-16 05:23:35,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010485344] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797885857] [2022-10-16 05:23:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:35,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:35,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:35,411 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) [2022-10-16 05:23:35,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 05:23:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:35,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 05:23:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:23:35,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:23:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:23:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797885857] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:23:35,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:23:35,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-16 05:23:35,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245844690] [2022-10-16 05:23:35,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:23:35,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 05:23:35,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:35,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 05:23:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:23:35,936 INFO L87 Difference]: Start difference. First operand 206 states and 247 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:36,602 INFO L93 Difference]: Finished difference Result 500 states and 503 transitions. [2022-10-16 05:23:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 05:23:36,603 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-10-16 05:23:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:36,606 INFO L225 Difference]: With dead ends: 500 [2022-10-16 05:23:36,606 INFO L226 Difference]: Without dead ends: 500 [2022-10-16 05:23:36,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 05:23:36,607 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 958 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:36,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 150 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-16 05:23:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-10-16 05:23:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 414. [2022-10-16 05:23:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 407 states have (on average 1.2358722358722358) internal successors, (503), 413 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 503 transitions. [2022-10-16 05:23:36,619 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 503 transitions. Word has length 53 [2022-10-16 05:23:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:36,620 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 503 transitions. [2022-10-16 05:23:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 503 transitions. [2022-10-16 05:23:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-16 05:23:36,623 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:36,623 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:36,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:36,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:36,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:36,841 INFO L85 PathProgramCache]: Analyzing trace with hash 605209398, now seen corresponding path program 2 times [2022-10-16 05:23:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:36,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590484919] [2022-10-16 05:23:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:36,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:23:38,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:38,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590484919] [2022-10-16 05:23:38,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590484919] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:38,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849318389] [2022-10-16 05:23:38,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:23:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:38,163 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) [2022-10-16 05:23:38,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 05:23:38,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 05:23:38,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:23:38,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-16 05:23:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:23:38,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:23:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:23:39,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849318389] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:23:39,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:23:39,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-16 05:23:39,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69388550] [2022-10-16 05:23:39,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:23:39,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 05:23:39,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 05:23:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:23:39,837 INFO L87 Difference]: Start difference. First operand 414 states and 503 transitions. Second operand has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 65 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:42,017 INFO L93 Difference]: Finished difference Result 1012 states and 1015 transitions. [2022-10-16 05:23:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-16 05:23:42,018 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 65 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-10-16 05:23:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:42,026 INFO L225 Difference]: With dead ends: 1012 [2022-10-16 05:23:42,026 INFO L226 Difference]: Without dead ends: 1012 [2022-10-16 05:23:42,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-16 05:23:42,029 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2889 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2889 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:42,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2889 Valid, 228 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-16 05:23:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-10-16 05:23:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 830. [2022-10-16 05:23:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 823 states have (on average 1.2332928311057108) internal successors, (1015), 829 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1015 transitions. [2022-10-16 05:23:42,046 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1015 transitions. Word has length 101 [2022-10-16 05:23:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:42,047 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 1015 transitions. [2022-10-16 05:23:42,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 65 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1015 transitions. [2022-10-16 05:23:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-10-16 05:23:42,050 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:42,050 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:42,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:42,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:42,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:42,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2010229962, now seen corresponding path program 3 times [2022-10-16 05:23:42,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:42,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780303503] [2022-10-16 05:23:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:42,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5737 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 05:23:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:46,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780303503] [2022-10-16 05:23:46,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780303503] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:46,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100570300] [2022-10-16 05:23:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 05:23:46,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:46,608 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) [2022-10-16 05:23:46,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 05:23:46,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-16 05:23:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:23:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-16 05:23:46,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 05:23:46,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 05:23:46,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 05:23:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5737 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-16 05:23:47,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 05:23:47,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100570300] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 05:23:47,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 05:23:47,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [65] total 69 [2022-10-16 05:23:47,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759662188] [2022-10-16 05:23:47,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 05:23:47,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 05:23:47,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 05:23:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2094, Invalid=2598, Unknown=0, NotChecked=0, Total=4692 [2022-10-16 05:23:47,505 INFO L87 Difference]: Start difference. First operand 830 states and 1015 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:23:47,569 INFO L93 Difference]: Finished difference Result 829 states and 1012 transitions. [2022-10-16 05:23:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 05:23:47,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-10-16 05:23:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:23:47,574 INFO L225 Difference]: With dead ends: 829 [2022-10-16 05:23:47,575 INFO L226 Difference]: Without dead ends: 829 [2022-10-16 05:23:47,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2094, Invalid=2598, Unknown=0, NotChecked=0, Total=4692 [2022-10-16 05:23:47,580 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 05:23:47,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 05:23:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-10-16 05:23:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-10-16 05:23:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 823 states have (on average 1.2296476306196842) internal successors, (1012), 828 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1012 transitions. [2022-10-16 05:23:47,603 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1012 transitions. Word has length 197 [2022-10-16 05:23:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:23:47,604 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1012 transitions. [2022-10-16 05:23:47,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:23:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1012 transitions. [2022-10-16 05:23:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-10-16 05:23:47,606 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:23:47,607 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:23:47,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 05:23:47,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-16 05:23:47,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:23:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:23:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2107380589, now seen corresponding path program 1 times [2022-10-16 05:23:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:23:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457056491] [2022-10-16 05:23:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:23:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:23:51,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:23:51,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457056491] [2022-10-16 05:23:51,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457056491] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:23:51,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893665345] [2022-10-16 05:23:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:23:51,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:23:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:23:51,350 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) [2022-10-16 05:23:51,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 05:23:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:23:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 05:23:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:23:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:23:51,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:23:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:23:57,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893665345] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:23:57,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:23:57,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-16 05:23:57,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107252165] [2022-10-16 05:23:57,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:23:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-16 05:23:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:23:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-16 05:23:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:23:57,290 INFO L87 Difference]: Start difference. First operand 829 states and 1012 transitions. Second operand has 129 states, 129 states have (on average 3.007751937984496) internal successors, (388), 129 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:24:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:24:11,607 INFO L93 Difference]: Finished difference Result 2033 states and 2036 transitions. [2022-10-16 05:24:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-16 05:24:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.007751937984496) internal successors, (388), 129 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2022-10-16 05:24:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:24:11,616 INFO L225 Difference]: With dead ends: 2033 [2022-10-16 05:24:11,616 INFO L226 Difference]: Without dead ends: 2033 [2022-10-16 05:24:11,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-16 05:24:11,622 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5515 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 1155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5515 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1155 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-16 05:24:11,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5515 Valid, 386 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1155 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-16 05:24:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-10-16 05:24:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1661. [2022-10-16 05:24:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1655 states have (on average 1.2302114803625377) internal successors, (2036), 1660 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:24:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2036 transitions. [2022-10-16 05:24:11,656 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2036 transitions. Word has length 198 [2022-10-16 05:24:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:24:11,657 INFO L495 AbstractCegarLoop]: Abstraction has 1661 states and 2036 transitions. [2022-10-16 05:24:11,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.007751937984496) internal successors, (388), 129 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:24:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2036 transitions. [2022-10-16 05:24:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-10-16 05:24:11,664 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:24:11,664 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:24:11,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 05:24:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:24:11,879 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:24:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:24:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1735855251, now seen corresponding path program 2 times [2022-10-16 05:24:11,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:24:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329855006] [2022-10-16 05:24:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:24:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:24:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:24:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 23754 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 05:24:25,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:24:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329855006] [2022-10-16 05:24:25,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329855006] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:24:25,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375176879] [2022-10-16 05:24:25,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 05:24:25,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:24:25,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:24:25,306 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) [2022-10-16 05:24:25,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 05:24:25,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-16 05:24:25,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 05:24:25,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 05:24:25,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:24:25,487 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 05:24:25,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 05:24:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23754 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 23752 trivial. 0 not checked. [2022-10-16 05:24:27,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:24:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 23754 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23752 trivial. 0 not checked. [2022-10-16 05:24:33,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375176879] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:24:33,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:24:33,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 4, 4] total 135 [2022-10-16 05:24:33,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456018619] [2022-10-16 05:24:33,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:24:33,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-10-16 05:24:33,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:24:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-10-16 05:24:33,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8275, Invalid=9815, Unknown=0, NotChecked=0, Total=18090 [2022-10-16 05:24:33,472 INFO L87 Difference]: Start difference. First operand 1661 states and 2036 transitions. Second operand has 135 states, 135 states have (on average 3.0814814814814815) internal successors, (416), 135 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:24:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 05:24:58,366 INFO L93 Difference]: Finished difference Result 1688 states and 1691 transitions. [2022-10-16 05:24:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-10-16 05:24:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.0814814814814815) internal successors, (416), 135 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2022-10-16 05:24:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 05:24:58,375 INFO L225 Difference]: With dead ends: 1688 [2022-10-16 05:24:58,375 INFO L226 Difference]: Without dead ends: 1688 [2022-10-16 05:24:58,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=25689, Invalid=43743, Unknown=0, NotChecked=0, Total=69432 [2022-10-16 05:24:58,383 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7875 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 2463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7875 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 3954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2463 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-16 05:24:58,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7875 Valid, 381 Invalid, 3954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2463 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-10-16 05:24:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-10-16 05:24:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1686. [2022-10-16 05:24:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1682 states have (on average 1.0041617122473245) internal successors, (1689), 1685 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:24:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 1689 transitions. [2022-10-16 05:24:58,415 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 1689 transitions. Word has length 390 [2022-10-16 05:24:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 05:24:58,416 INFO L495 AbstractCegarLoop]: Abstraction has 1686 states and 1689 transitions. [2022-10-16 05:24:58,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.0814814814814815) internal successors, (416), 135 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 05:24:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 1689 transitions. [2022-10-16 05:24:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1673 [2022-10-16 05:24:58,496 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 05:24:58,497 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 05:24:58,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 05:24:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 05:24:58,706 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-16 05:24:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 05:24:58,708 INFO L85 PathProgramCache]: Analyzing trace with hash -150047969, now seen corresponding path program 1 times [2022-10-16 05:24:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 05:24:58,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316533685] [2022-10-16 05:24:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:24:58,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 05:24:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:25:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 106176 backedges. 0 proven. 24512 refuted. 0 times theorem prover too weak. 81664 trivial. 0 not checked. [2022-10-16 05:25:30,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 05:25:30,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316533685] [2022-10-16 05:25:30,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316533685] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 05:25:30,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396803352] [2022-10-16 05:25:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 05:25:30,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 05:25:30,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 05:25:30,419 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) [2022-10-16 05:25:30,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 05:25:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 05:25:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 6074 conjuncts, 130 conjunts are in the unsatisfiable core [2022-10-16 05:25:31,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 05:25:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 106176 backedges. 0 proven. 24512 refuted. 0 times theorem prover too weak. 81664 trivial. 0 not checked. [2022-10-16 05:25:32,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 05:25:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 106176 backedges. 0 proven. 24512 refuted. 0 times theorem prover too weak. 81664 trivial. 0 not checked. [2022-10-16 05:25:54,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396803352] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 05:25:54,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 05:25:54,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2022-10-16 05:25:54,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124348200] [2022-10-16 05:25:54,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 05:25:54,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-10-16 05:25:54,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 05:25:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-10-16 05:25:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-10-16 05:25:54,951 INFO L87 Difference]: Start difference. First operand 1686 states and 1689 transitions. Second operand has 261 states, 261 states have (on average 3.0306513409961684) internal successors, (791), 261 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)