/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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:09:05,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:09:05,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:09:05,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 18:09:05,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:09:05,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:09:05,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:09:05,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:09:05,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:09:05,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:09:05,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:09:05,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:09:05,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:09:05,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:09:05,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:09:05,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:09:05,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:09:06,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:09:06,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:09:06,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:09:06,007 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 [2022-10-15 18:09:06,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:09:06,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:09:06,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:09:06,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:09:06,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:09:06,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:09:06,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:09:06,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:09:06,037 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:09:06,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:09:06,038 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:09:06,038 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:09:06,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:09:06,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:09:06,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:09:06,039 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:09:06,039 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:09:06,039 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:09:06,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:09:06,039 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:09:06,040 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:09:06,040 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:09:06,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:09:06,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:09:06,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:09:06,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:09:06,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:09:06,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:09:06,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:09:06,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:09:06,042 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:09:06,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:09:06,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:09:06,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:09:06,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:09:06,473 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:09:06,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-10-15 18:09:06,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97b9f6a99/e1d104c1b55a40cb97812f3b19f86724/FLAG918296122 [2022-10-15 18:09:07,100 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:09:07,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-10-15 18:09:07,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97b9f6a99/e1d104c1b55a40cb97812f3b19f86724/FLAG918296122 [2022-10-15 18:09:07,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97b9f6a99/e1d104c1b55a40cb97812f3b19f86724 [2022-10-15 18:09:07,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:09:07,467 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:09:07,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:09:07,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:09:07,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:09:07,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3263f80b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07, skipping insertion in model container [2022-10-15 18:09:07,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:09:07,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:09:07,653 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/sorting_selectionsort_2_ground.i[823,836] [2022-10-15 18:09:07,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:09:07,688 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:09:07,703 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/sorting_selectionsort_2_ground.i[823,836] [2022-10-15 18:09:07,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:09:07,736 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:09:07,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07 WrapperNode [2022-10-15 18:09:07,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:09:07,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:09:07,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:09:07,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:09:07,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,789 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-10-15 18:09:07,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:09:07,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:09:07,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:09:07,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:09:07,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,820 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:09:07,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:09:07,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:09:07,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:09:07,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (1/1) ... [2022-10-15 18:09:07,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:09:07,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:07,864 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) [2022-10-15 18:09:07,884 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 [2022-10-15 18:09:07,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:09:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:09:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:09:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:09:07,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:09:07,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:09:07,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:09:07,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-15 18:09:07,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-15 18:09:07,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:09:08,008 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:09:08,011 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:09:08,466 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:09:08,485 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:09:08,485 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-10-15 18:09:08,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:09:08 BoogieIcfgContainer [2022-10-15 18:09:08,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:09:08,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:09:08,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:09:08,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:09:08,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:09:07" (1/3) ... [2022-10-15 18:09:08,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb2abbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:09:08, skipping insertion in model container [2022-10-15 18:09:08,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:09:07" (2/3) ... [2022-10-15 18:09:08,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb2abbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:09:08, skipping insertion in model container [2022-10-15 18:09:08,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:09:08" (3/3) ... [2022-10-15 18:09:08,506 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2022-10-15 18:09:08,531 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:09:08,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-10-15 18:09:08,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:09:08,643 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;@4463a9ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:09:08,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2022-10-15 18:09:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 50 states have (on average 1.94) internal successors, (97), 78 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 18:09:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:09:08,678 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:08,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:09:08,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:09:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:08,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189722661] [2022-10-15 18:09:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:08,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:08,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189722661] [2022-10-15 18:09:08,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189722661] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:08,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:09:08,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:09:08,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104750399] [2022-10-15 18:09:08,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:09:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:09:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:09:09,031 INFO L87 Difference]: Start difference. First operand has 83 states, 50 states have (on average 1.94) internal successors, (97), 78 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-10-15 18:09:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:09,151 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2022-10-15 18:09:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:09:09,154 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 [2022-10-15 18:09:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:09,165 INFO L225 Difference]: With dead ends: 70 [2022-10-15 18:09:09,165 INFO L226 Difference]: Without dead ends: 68 [2022-10-15 18:09:09,167 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 [2022-10-15 18:09:09,172 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:09,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-15 18:09:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-10-15 18:09:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.489795918367347) internal successors, (73), 63 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 18:09:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-10-15 18:09:09,262 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 4 [2022-10-15 18:09:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:09,262 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-10-15 18:09:09,263 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) [2022-10-15 18:09:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-10-15 18:09:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:09:09,263 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:09,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:09:09,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:09:09,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:09:09,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:09,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965318066] [2022-10-15 18:09:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:09,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:09,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965318066] [2022-10-15 18:09:09,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965318066] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:09,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:09:09,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:09:09,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404751329] [2022-10-15 18:09:09,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:09,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:09:09,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:09:09,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:09:09,397 INFO L87 Difference]: Start difference. First operand 68 states and 79 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) [2022-10-15 18:09:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:09,485 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-10-15 18:09:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:09:09,486 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 [2022-10-15 18:09:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:09,487 INFO L225 Difference]: With dead ends: 72 [2022-10-15 18:09:09,488 INFO L226 Difference]: Without dead ends: 72 [2022-10-15 18:09:09,488 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 [2022-10-15 18:09:09,490 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:09,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-15 18:09:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-10-15 18:09:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 65 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 18:09:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-10-15 18:09:09,504 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 4 [2022-10-15 18:09:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:09,505 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-10-15 18:09:09,505 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) [2022-10-15 18:09:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-10-15 18:09:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:09:09,506 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:09,506 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:09,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:09:09,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:09,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:09,507 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 18:09:09,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:09,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055469089] [2022-10-15 18:09:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:09,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:09,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055469089] [2022-10-15 18:09:09,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055469089] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:09,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141988199] [2022-10-15 18:09:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:09,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:09,769 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) [2022-10-15 18:09:09,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:09:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:09:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:09,964 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:09:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:10,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:10,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141988199] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:10,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:10,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:09:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717960544] [2022-10-15 18:09:10,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:09:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:09:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:09:10,111 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:10,315 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2022-10-15 18:09:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:09:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 18:09:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:10,319 INFO L225 Difference]: With dead ends: 100 [2022-10-15 18:09:10,319 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 18:09:10,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:09:10,322 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:10,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 149 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:09:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 18:09:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2022-10-15 18:09:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 88 states have internal predecessors, (106), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:09:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2022-10-15 18:09:10,336 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 8 [2022-10-15 18:09:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:10,337 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2022-10-15 18:09:10,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2022-10-15 18:09:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 18:09:10,338 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:10,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:10,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:10,554 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 [2022-10-15 18:09:10,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:10,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:10,556 INFO L85 PathProgramCache]: Analyzing trace with hash -169937429, now seen corresponding path program 1 times [2022-10-15 18:09:10,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:10,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80248698] [2022-10-15 18:09:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:10,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 18:09:10,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:10,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80248698] [2022-10-15 18:09:10,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80248698] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:10,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:09:10,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 18:09:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057559896] [2022-10-15 18:09:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:10,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 18:09:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 18:09:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:09:10,871 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:11,076 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2022-10-15 18:09:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:09:11,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 18:09:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:11,079 INFO L225 Difference]: With dead ends: 150 [2022-10-15 18:09:11,079 INFO L226 Difference]: Without dead ends: 150 [2022-10-15 18:09:11,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-15 18:09:11,081 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:11,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 105 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:09:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-10-15 18:09:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2022-10-15 18:09:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 100 states have internal predecessors, (124), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 18:09:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2022-10-15 18:09:11,097 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 15 [2022-10-15 18:09:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:11,097 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2022-10-15 18:09:11,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2022-10-15 18:09:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 18:09:11,098 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:11,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:11,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:09:11,099 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash -973093021, now seen corresponding path program 1 times [2022-10-15 18:09:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689881339] [2022-10-15 18:09:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:11,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:11,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689881339] [2022-10-15 18:09:11,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689881339] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:11,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66939854] [2022-10-15 18:09:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:11,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:11,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:11,205 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) [2022-10-15 18:09:11,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:09:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:09:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:11,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:11,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66939854] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:11,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:11,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 18:09:11,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741699239] [2022-10-15 18:09:11,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:11,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:09:11,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:11,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:09:11,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:09:11,361 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2022-10-15 18:09:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:11,566 INFO L93 Difference]: Finished difference Result 350 states and 436 transitions. [2022-10-15 18:09:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:09:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 16 [2022-10-15 18:09:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:11,572 INFO L225 Difference]: With dead ends: 350 [2022-10-15 18:09:11,573 INFO L226 Difference]: Without dead ends: 350 [2022-10-15 18:09:11,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:09:11,579 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 428 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:11,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 298 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:09:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-10-15 18:09:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 306. [2022-10-15 18:09:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 273 states have (on average 1.465201465201465) internal successors, (400), 286 states have internal predecessors, (400), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-10-15 18:09:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 436 transitions. [2022-10-15 18:09:11,632 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 436 transitions. Word has length 16 [2022-10-15 18:09:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:11,632 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 436 transitions. [2022-10-15 18:09:11,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2022-10-15 18:09:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 436 transitions. [2022-10-15 18:09:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 18:09:11,633 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:11,633 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:09:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:11,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:11,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-15 18:09:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610552734] [2022-10-15 18:09:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:12,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:12,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610552734] [2022-10-15 18:09:12,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610552734] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586426002] [2022-10-15 18:09:12,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:09:12,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:12,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:12,103 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) [2022-10-15 18:09:12,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:09:12,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:09:12,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:12,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:09:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:12,184 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:09:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:12,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:09:12,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586426002] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:12,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:09:12,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-15 18:09:12,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001523437] [2022-10-15 18:09:12,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:12,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:09:12,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:12,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:09:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:09:12,373 INFO L87 Difference]: Start difference. First operand 306 states and 436 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:12,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:12,735 INFO L93 Difference]: Finished difference Result 333 states and 430 transitions. [2022-10-15 18:09:12,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:09:12,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 18:09:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:12,738 INFO L225 Difference]: With dead ends: 333 [2022-10-15 18:09:12,738 INFO L226 Difference]: Without dead ends: 333 [2022-10-15 18:09:12,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:09:12,739 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 296 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:12,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 207 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:09:12,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-10-15 18:09:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 279. [2022-10-15 18:09:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 249 states have (on average 1.4377510040160641) internal successors, (358), 261 states have internal predecessors, (358), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-10-15 18:09:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 390 transitions. [2022-10-15 18:09:12,755 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 390 transitions. Word has length 20 [2022-10-15 18:09:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:12,755 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 390 transitions. [2022-10-15 18:09:12,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 390 transitions. [2022-10-15 18:09:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 18:09:12,757 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:12,757 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:12,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:12,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:12,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:12,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1934549393, now seen corresponding path program 2 times [2022-10-15 18:09:12,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:12,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064861788] [2022-10-15 18:09:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:12,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:13,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:13,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064861788] [2022-10-15 18:09:13,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064861788] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:13,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196322757] [2022-10-15 18:09:13,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:09:13,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:13,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:13,158 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) [2022-10-15 18:09:13,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:09:13,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:09:13,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:09:13,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:13,245 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:09:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 18:09:13,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:09:13,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196322757] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:13,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:09:13,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2022-10-15 18:09:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409363814] [2022-10-15 18:09:13,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:13,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 18:09:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:13,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 18:09:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:09:13,400 INFO L87 Difference]: Start difference. First operand 279 states and 390 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:13,572 INFO L93 Difference]: Finished difference Result 320 states and 431 transitions. [2022-10-15 18:09:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:09:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-10-15 18:09:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:13,575 INFO L225 Difference]: With dead ends: 320 [2022-10-15 18:09:13,575 INFO L226 Difference]: Without dead ends: 320 [2022-10-15 18:09:13,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:09:13,577 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 147 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:13,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 124 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:09:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-10-15 18:09:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 289. [2022-10-15 18:09:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 259 states have (on average 1.4324324324324325) internal successors, (371), 271 states have internal predecessors, (371), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-10-15 18:09:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2022-10-15 18:09:13,588 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 32 [2022-10-15 18:09:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:13,589 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2022-10-15 18:09:13,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2022-10-15 18:09:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-15 18:09:13,590 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:13,590 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:13,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:13,805 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 [2022-10-15 18:09:13,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2030643794, now seen corresponding path program 1 times [2022-10-15 18:09:13,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:13,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690636242] [2022-10-15 18:09:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:13,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:13,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690636242] [2022-10-15 18:09:13,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690636242] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410465262] [2022-10-15 18:09:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:13,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:13,937 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) [2022-10-15 18:09:13,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:09:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:09:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:14,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:14,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410465262] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:14,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:14,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:09:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955329187] [2022-10-15 18:09:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:09:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:09:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:09:14,180 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:14,681 INFO L93 Difference]: Finished difference Result 656 states and 795 transitions. [2022-10-15 18:09:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:09:14,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-15 18:09:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:14,686 INFO L225 Difference]: With dead ends: 656 [2022-10-15 18:09:14,686 INFO L226 Difference]: Without dead ends: 656 [2022-10-15 18:09:14,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:09:14,688 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1308 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:14,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 586 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:09:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-10-15 18:09:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 561. [2022-10-15 18:09:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 515 states have (on average 1.4194174757281552) internal successors, (731), 527 states have internal predecessors, (731), 32 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-10-15 18:09:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 795 transitions. [2022-10-15 18:09:14,707 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 795 transitions. Word has length 36 [2022-10-15 18:09:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:14,708 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 795 transitions. [2022-10-15 18:09:14,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 795 transitions. [2022-10-15 18:09:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-15 18:09:14,710 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:14,710 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:14,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:14,925 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 [2022-10-15 18:09:14,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:14,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2033957782, now seen corresponding path program 2 times [2022-10-15 18:09:14,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:14,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172559490] [2022-10-15 18:09:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:14,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:15,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:15,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172559490] [2022-10-15 18:09:15,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172559490] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715710922] [2022-10-15 18:09:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:09:15,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:15,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:15,312 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) [2022-10-15 18:09:15,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:09:15,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:09:15,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:09:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:15,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:15,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715710922] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:15,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:15,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:09:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498967381] [2022-10-15 18:09:15,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:09:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:09:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:09:15,908 INFO L87 Difference]: Start difference. First operand 561 states and 795 transitions. Second operand has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:17,343 INFO L93 Difference]: Finished difference Result 1312 states and 1579 transitions. [2022-10-15 18:09:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:09:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-10-15 18:09:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:17,352 INFO L225 Difference]: With dead ends: 1312 [2022-10-15 18:09:17,352 INFO L226 Difference]: Without dead ends: 1312 [2022-10-15 18:09:17,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:09:17,354 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 3143 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3203 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:17,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3203 Valid, 1166 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 18:09:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-10-15 18:09:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1105. [2022-10-15 18:09:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1027 states have (on average 1.4128529698149952) internal successors, (1451), 1039 states have internal predecessors, (1451), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-10-15 18:09:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1579 transitions. [2022-10-15 18:09:17,389 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1579 transitions. Word has length 68 [2022-10-15 18:09:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:17,390 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1579 transitions. [2022-10-15 18:09:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1579 transitions. [2022-10-15 18:09:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-10-15 18:09:17,392 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:17,392 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:17,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:17,606 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 [2022-10-15 18:09:17,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash 263149722, now seen corresponding path program 3 times [2022-10-15 18:09:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:17,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301517043] [2022-10-15 18:09:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:19,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301517043] [2022-10-15 18:09:19,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301517043] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:19,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834405960] [2022-10-15 18:09:19,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:09:19,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:19,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:19,275 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) [2022-10-15 18:09:19,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:09:19,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:09:19,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:09:19,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:19,364 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:09:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-10-15 18:09:19,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:09:19,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834405960] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:19,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:09:19,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [33] total 38 [2022-10-15 18:09:19,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684577686] [2022-10-15 18:09:19,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:19,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:09:19,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:09:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2022-10-15 18:09:19,982 INFO L87 Difference]: Start difference. First operand 1105 states and 1579 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-10-15 18:09:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:20,209 INFO L93 Difference]: Finished difference Result 1255 states and 1814 transitions. [2022-10-15 18:09:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:09:20,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 132 [2022-10-15 18:09:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:20,221 INFO L225 Difference]: With dead ends: 1255 [2022-10-15 18:09:20,221 INFO L226 Difference]: Without dead ends: 1255 [2022-10-15 18:09:20,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=566, Invalid=1074, Unknown=0, NotChecked=0, Total=1640 [2022-10-15 18:09:20,224 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 164 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:20,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 76 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-10-15 18:09:20,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1162. [2022-10-15 18:09:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1084 states have (on average 1.4160516605166051) internal successors, (1535), 1096 states have internal predecessors, (1535), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-10-15 18:09:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1663 transitions. [2022-10-15 18:09:20,305 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1663 transitions. Word has length 132 [2022-10-15 18:09:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:20,306 INFO L495 AbstractCegarLoop]: Abstraction has 1162 states and 1663 transitions. [2022-10-15 18:09:20,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-10-15 18:09:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1663 transitions. [2022-10-15 18:09:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-10-15 18:09:20,317 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:20,317 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:20,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:20,518 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 [2022-10-15 18:09:20,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -434141618, now seen corresponding path program 1 times [2022-10-15 18:09:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234952950] [2022-10-15 18:09:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:20,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-10-15 18:09:20,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234952950] [2022-10-15 18:09:20,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234952950] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198720443] [2022-10-15 18:09:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:20,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:20,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:20,685 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) [2022-10-15 18:09:20,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:09:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:20,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:09:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:09:21,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:09:22,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198720443] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:22,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:22,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 33, 33] total 66 [2022-10-15 18:09:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797104120] [2022-10-15 18:09:22,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:22,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-10-15 18:09:22,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-10-15 18:09:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2022-10-15 18:09:22,960 INFO L87 Difference]: Start difference. First operand 1162 states and 1663 transitions. Second operand has 66 states, 66 states have (on average 4.090909090909091) internal successors, (270), 66 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:42,779 INFO L93 Difference]: Finished difference Result 4698 states and 5701 transitions. [2022-10-15 18:09:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2022-10-15 18:09:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.090909090909091) internal successors, (270), 66 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-10-15 18:09:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:42,803 INFO L225 Difference]: With dead ends: 4698 [2022-10-15 18:09:42,803 INFO L226 Difference]: Without dead ends: 4698 [2022-10-15 18:09:42,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20339 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=18078, Invalid=45174, Unknown=0, NotChecked=0, Total=63252 [2022-10-15 18:09:42,822 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 14599 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 1601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14723 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1601 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:42,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14723 Valid, 2487 Invalid, 4694 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1601 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-10-15 18:09:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2022-10-15 18:09:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 2811. [2022-10-15 18:09:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 2669 states have (on average 1.4297489696515548) internal successors, (3816), 2681 states have internal predecessors, (3816), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2022-10-15 18:09:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4072 transitions. [2022-10-15 18:09:42,919 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4072 transitions. Word has length 133 [2022-10-15 18:09:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:42,919 INFO L495 AbstractCegarLoop]: Abstraction has 2811 states and 4072 transitions. [2022-10-15 18:09:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.090909090909091) internal successors, (270), 66 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4072 transitions. [2022-10-15 18:09:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-10-15 18:09:42,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:42,924 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:42,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:43,137 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 [2022-10-15 18:09:43,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-10-15 18:09:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1772810034, now seen corresponding path program 1 times [2022-10-15 18:09:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:43,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523920237] [2022-10-15 18:09:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2022-10-15 18:09:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523920237] [2022-10-15 18:09:43,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523920237] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419460849] [2022-10-15 18:09:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:43,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:43,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:43,917 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) [2022-10-15 18:09:43,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 18:09:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:44,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-15 18:09:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:09:46,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:09:52,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419460849] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:52,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:52,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 65, 65] total 133 [2022-10-15 18:09:52,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77434064] [2022-10-15 18:09:52,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:52,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-10-15 18:09:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-10-15 18:09:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8394, Invalid=9162, Unknown=0, NotChecked=0, Total=17556 [2022-10-15 18:09:52,273 INFO L87 Difference]: Start difference. First operand 2811 states and 4072 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)