/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-lopstr16/partial_lesser_bound.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:22:15,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:22:15,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:22:15,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 16:22:15,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:22:15,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:22:15,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:22:15,953 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 16:22:16,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:22:16,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:22:16,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:22:16,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:22:16,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:22:16,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:22:16,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:22:16,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:22:16,016 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:22:16,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:22:16,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:22:16,018 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:22:16,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:22:16,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:22:16,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:22:16,019 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:22:16,019 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:22:16,019 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:22:16,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:22:16,020 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:22:16,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:22:16,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:22:16,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:22:16,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:22:16,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:22:16,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:22:16,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:22:16,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:22:16,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:22:16,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:22:16,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:22:16,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:22:16,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:22:16,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:22:16,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:22:16,480 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:22:16,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2022-10-15 16:22:16,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e98cb5a/8e02533066d54ec8a064253e2f338429/FLAG5bf27db4a [2022-10-15 16:22:17,174 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:22:17,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2022-10-15 16:22:17,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e98cb5a/8e02533066d54ec8a064253e2f338429/FLAG5bf27db4a [2022-10-15 16:22:17,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e98cb5a/8e02533066d54ec8a064253e2f338429 [2022-10-15 16:22:17,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:22:17,527 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:22:17,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:22:17,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:22:17,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:22:17,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559c4916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17, skipping insertion in model container [2022-10-15 16:22:17,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:22:17,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:22:17,790 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-lopstr16/partial_lesser_bound.i[813,826] [2022-10-15 16:22:17,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:22:17,821 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:22:17,836 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-lopstr16/partial_lesser_bound.i[813,826] [2022-10-15 16:22:17,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:22:17,859 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:22:17,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17 WrapperNode [2022-10-15 16:22:17,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:22:17,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:22:17,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:22:17,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:22:17,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,904 INFO L138 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-10-15 16:22:17,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:22:17,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:22:17,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:22:17,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:22:17,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,931 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:22:17,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:22:17,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:22:17,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:22:17,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (1/1) ... [2022-10-15 16:22:17,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:22:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:17,977 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 16:22:18,002 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 16:22:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-15 16:22:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:22:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:22:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-15 16:22:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-15 16:22:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:22:18,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:22:18,137 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:22:18,140 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:22:18,391 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:22:18,400 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:22:18,400 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 16:22:18,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:22:18 BoogieIcfgContainer [2022-10-15 16:22:18,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:22:18,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:22:18,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:22:18,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:22:18,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:22:17" (1/3) ... [2022-10-15 16:22:18,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b59753d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:22:18, skipping insertion in model container [2022-10-15 16:22:18,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:22:17" (2/3) ... [2022-10-15 16:22:18,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b59753d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:22:18, skipping insertion in model container [2022-10-15 16:22:18,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:22:18" (3/3) ... [2022-10-15 16:22:18,414 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound.i [2022-10-15 16:22:18,438 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:22:18,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-10-15 16:22:18,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:22:18,510 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;@60a24c85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:22:18,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-10-15 16:22:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:22:18,524 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:18,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:22:18,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 16:22:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:18,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040934178] [2022-10-15 16:22:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:18,911 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 16:22:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040934178] [2022-10-15 16:22:18,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040934178] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:18,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:18,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 16:22:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506057546] [2022-10-15 16:22:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:18,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:22:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:22:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:22:18,992 INFO L87 Difference]: Start difference. First operand has 30 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 16:22:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:19,082 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-10-15 16:22:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:22:19,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 16:22:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:19,096 INFO L225 Difference]: With dead ends: 27 [2022-10-15 16:22:19,097 INFO L226 Difference]: Without dead ends: 25 [2022-10-15 16:22:19,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 16:22:19,108 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:19,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-15 16:22:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-15 16:22:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-10-15 16:22:19,155 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 4 [2022-10-15 16:22:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:19,156 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-10-15 16:22:19,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 16:22:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-10-15 16:22:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 16:22:19,158 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:19,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 16:22:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 16:22:19,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 16:22:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573461229] [2022-10-15 16:22:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:19,399 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 16:22:19,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:19,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573461229] [2022-10-15 16:22:19,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573461229] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:19,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:22:19,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:22:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281134063] [2022-10-15 16:22:19,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:22:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:22:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:19,409 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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 16:22:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:19,484 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-10-15 16:22:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:22:19,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 16:22:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:19,487 INFO L225 Difference]: With dead ends: 29 [2022-10-15 16:22:19,487 INFO L226 Difference]: Without dead ends: 29 [2022-10-15 16:22:19,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:22:19,490 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:19,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-15 16:22:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-10-15 16:22:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-10-15 16:22:19,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2022-10-15 16:22:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:19,507 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-10-15 16:22:19,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 16:22:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-10-15 16:22:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 16:22:19,509 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:19,509 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 16:22:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 16:22:19,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2022-10-15 16:22:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:19,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403352179] [2022-10-15 16:22:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:19,843 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 16:22:19,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:19,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403352179] [2022-10-15 16:22:19,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403352179] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:19,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212139496] [2022-10-15 16:22:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:19,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:19,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:19,850 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 16:22:19,858 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 16:22:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 16:22:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:20,050 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 16:22:20,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:20,155 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 16:22:20,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212139496] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:20,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:20,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-10-15 16:22:20,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510382088] [2022-10-15 16:22:20,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:20,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:22:20,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:22:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:22:20,159 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:20,425 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-10-15 16:22:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:22:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 16:22:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:20,427 INFO L225 Difference]: With dead ends: 38 [2022-10-15 16:22:20,427 INFO L226 Difference]: Without dead ends: 38 [2022-10-15 16:22:20,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-10-15 16:22:20,430 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:20,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 57 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-15 16:22:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-15 16:22:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-10-15 16:22:20,438 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 7 [2022-10-15 16:22:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:20,439 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-10-15 16:22:20,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-10-15 16:22:20,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 16:22:20,440 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:20,440 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-10-15 16:22:20,482 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 16:22:20,654 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 16:22:20,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash -116849082, now seen corresponding path program 2 times [2022-10-15 16:22:20,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:20,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478761345] [2022-10-15 16:22:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:21,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:21,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478761345] [2022-10-15 16:22:21,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478761345] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980426267] [2022-10-15 16:22:21,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:22:21,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:21,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:21,267 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 16:22:21,293 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 16:22:21,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:22:21,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:21,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 16:22:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:22:21,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:22:21,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980426267] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:22:21,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:22:21,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2022-10-15 16:22:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487471598] [2022-10-15 16:22:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:22:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 16:22:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 16:22:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-10-15 16:22:21,625 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:21,694 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-10-15 16:22:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:22:21,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-15 16:22:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:21,696 INFO L225 Difference]: With dead ends: 38 [2022-10-15 16:22:21,696 INFO L226 Difference]: Without dead ends: 38 [2022-10-15 16:22:21,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-10-15 16:22:21,698 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:21,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-15 16:22:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-10-15 16:22:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-10-15 16:22:21,704 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2022-10-15 16:22:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:21,705 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-10-15 16:22:21,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-10-15 16:22:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 16:22:21,706 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:21,706 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:21,741 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 16:22:21,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-15 16:22:21,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -940587724, now seen corresponding path program 1 times [2022-10-15 16:22:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:21,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862106867] [2022-10-15 16:22:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:21,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:22:22,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862106867] [2022-10-15 16:22:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862106867] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39127042] [2022-10-15 16:22:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:22,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:22,051 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 16:22:22,053 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 16:22:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:22,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:22:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:22:22,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:22:22,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39127042] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:22,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:22,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-15 16:22:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053279334] [2022-10-15 16:22:22,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:22,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 16:22:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 16:22:22,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:22:22,214 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:22,387 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2022-10-15 16:22:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 16:22:22,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-15 16:22:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:22,389 INFO L225 Difference]: With dead ends: 127 [2022-10-15 16:22:22,389 INFO L226 Difference]: Without dead ends: 127 [2022-10-15 16:22:22,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:22:22,391 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 285 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:22,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 59 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:22:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-10-15 16:22:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2022-10-15 16:22:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2022-10-15 16:22:22,402 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 22 [2022-10-15 16:22:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:22,402 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2022-10-15 16:22:22,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2022-10-15 16:22:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-15 16:22:22,404 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:22,404 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:22,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-15 16:22:22,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:22,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2146729524, now seen corresponding path program 2 times [2022-10-15 16:22:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:22,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866835763] [2022-10-15 16:22:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:22,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:22:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866835763] [2022-10-15 16:22:22,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866835763] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880149662] [2022-10-15 16:22:22,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:22:22,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:22,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:22,936 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 16:22:22,960 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 16:22:23,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:22:23,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 16:22:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:22:23,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:22:23,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880149662] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:23,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:23,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-15 16:22:23,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750532040] [2022-10-15 16:22:23,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:23,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 16:22:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:23,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 16:22:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 16:22:23,332 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:23,783 INFO L93 Difference]: Finished difference Result 247 states and 250 transitions. [2022-10-15 16:22:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 16:22:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-10-15 16:22:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:23,793 INFO L225 Difference]: With dead ends: 247 [2022-10-15 16:22:23,793 INFO L226 Difference]: Without dead ends: 247 [2022-10-15 16:22:23,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 16:22:23,796 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 760 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:23,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 93 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:22:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-10-15 16:22:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 190. [2022-10-15 16:22:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.1881720430107527) internal successors, (221), 189 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 16:22:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2022-10-15 16:22:23,840 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 40 [2022-10-15 16:22:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:23,840 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2022-10-15 16:22:23,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2022-10-15 16:22:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-15 16:22:23,846 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:23,846 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:23,883 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 16:22:24,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:24,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 762916916, now seen corresponding path program 3 times [2022-10-15 16:22:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:24,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052588273] [2022-10-15 16:22:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:22:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:25,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052588273] [2022-10-15 16:22:25,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052588273] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:25,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954919331] [2022-10-15 16:22:25,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:22:25,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:25,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:25,036 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 16:22:25,055 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 16:22:25,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:22:25,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:22:25,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 16:22:25,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:25,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-15 16:22:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:22:25,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-15 16:22:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-10-15 16:22:25,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:32,053 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-15 16:22:36,215 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 16:22:36,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-10-15 16:22:42,639 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-15 16:22:44,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-10-15 16:22:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-10-15 16:22:47,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954919331] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:47,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:47,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8, 8] total 41 [2022-10-15 16:22:47,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243506146] [2022-10-15 16:22:47,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:47,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-15 16:22:47,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-15 16:22:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=1118, Unknown=1, NotChecked=0, Total=1640 [2022-10-15 16:22:47,547 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:54,990 INFO L93 Difference]: Finished difference Result 386 states and 389 transitions. [2022-10-15 16:22:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-10-15 16:22:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-10-15 16:22:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:54,992 INFO L225 Difference]: With dead ends: 386 [2022-10-15 16:22:54,993 INFO L226 Difference]: Without dead ends: 386 [2022-10-15 16:22:55,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 156 SyntacticMatches, 39 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7466 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=4716, Invalid=12313, Unknown=1, NotChecked=0, Total=17030 [2022-10-15 16:22:55,001 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1345 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:55,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 225 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 289 Invalid, 0 Unknown, 344 Unchecked, 0.6s Time] [2022-10-15 16:22:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-10-15 16:22:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 310. [2022-10-15 16:22:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.1666666666666667) internal successors, (357), 309 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 16:22:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 357 transitions. [2022-10-15 16:22:55,020 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 357 transitions. Word has length 76 [2022-10-15 16:22:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:55,021 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 357 transitions. [2022-10-15 16:22:55,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 16:22:55,022 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 357 transitions. [2022-10-15 16:22:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-10-15 16:22:55,024 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:55,025 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:22:55,063 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 16:22:55,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:55,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash 179173924, now seen corresponding path program 1 times [2022-10-15 16:22:55,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:55,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288677350] [2022-10-15 16:22:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:55,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-10-15 16:22:57,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:22:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288677350] [2022-10-15 16:22:57,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288677350] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:22:57,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533986495] [2022-10-15 16:22:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:57,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:57,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:22:57,201 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 16:22:57,209 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 16:22:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:22:57,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 16:22:57,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:22:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-10-15 16:22:57,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:22:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-10-15 16:22:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533986495] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:22:58,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 16:22:58,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-10-15 16:22:58,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386900454] [2022-10-15 16:22:58,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 16:22:58,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-10-15 16:22:58,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:22:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-10-15 16:22:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-10-15 16:22:58,566 INFO L87 Difference]: Start difference. First operand 310 states and 357 transitions. Second operand has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 16:22:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:22:59,459 INFO L93 Difference]: Finished difference Result 486 states and 489 transitions. [2022-10-15 16:22:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-10-15 16:22:59,464 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-10-15 16:22:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:22:59,467 INFO L225 Difference]: With dead ends: 486 [2022-10-15 16:22:59,467 INFO L226 Difference]: Without dead ends: 486 [2022-10-15 16:22:59,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2022-10-15 16:22:59,470 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 944 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 16:22:59,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 175 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 16:22:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-10-15 16:22:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 398. [2022-10-15 16:22:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 394 states have (on average 1.134517766497462) internal successors, (447), 397 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 16:22:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 447 transitions. [2022-10-15 16:22:59,499 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 447 transitions. Word has length 161 [2022-10-15 16:22:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:22:59,500 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 447 transitions. [2022-10-15 16:22:59,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 16:22:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 447 transitions. [2022-10-15 16:22:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-10-15 16:22:59,509 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:22:59,509 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2022-10-15 16:22:59,546 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 16:22:59,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:22:59,711 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 16:22:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:22:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash 30735667, now seen corresponding path program 4 times [2022-10-15 16:22:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:22:59,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505829647] [2022-10-15 16:22:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:22:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:22:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4400 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-10-15 16:23:03,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:03,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505829647] [2022-10-15 16:23:03,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505829647] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:23:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913885098] [2022-10-15 16:23:03,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 16:23:03,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:03,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:03,914 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 16:23:03,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process