/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_two_index_09.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:14:41,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:14:41,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:14:41,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 18:14:41,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:14:41,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:14:41,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:14:41,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:14:41,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:14:41,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:14:41,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:14:41,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:14:41,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:14:41,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:14:41,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:14:41,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:14:41,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:14:41,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:14:41,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:14:41,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:14:41,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:14:41,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:14:41,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:14:41,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:14:41,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:14:41,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:14:41,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:14:41,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:14:41,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:14:41,196 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:14:41,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:14:41,197 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:14:41,198 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:14:41,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:14:41,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:14:41,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:14:41,199 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:14:41,199 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:14:41,199 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:14:41,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:14:41,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:14:41,200 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:14:41,200 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:14:41,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:14:41,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:14:41,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:14:41,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:14:41,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:14:41,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:14:41,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:14:41,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:14:41,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:14:41,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:14:41,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:14:41,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:14:41,641 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:14:41,644 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:14:41,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-10-15 18:14:41,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cbfd73f/8ffe1373db9c4f04a6f877c86014247e/FLAG1c09c09c5 [2022-10-15 18:14:42,331 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:14:42,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-10-15 18:14:42,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cbfd73f/8ffe1373db9c4f04a6f877c86014247e/FLAG1c09c09c5 [2022-10-15 18:14:42,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cbfd73f/8ffe1373db9c4f04a6f877c86014247e [2022-10-15 18:14:42,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:14:42,681 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:14:42,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:14:42,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:14:42,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:14:42,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:42,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea9a17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42, skipping insertion in model container [2022-10-15 18:14:42,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:42,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:14:42,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:14:42,887 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-10-15 18:14:42,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:14:42,914 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:14:42,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-10-15 18:14:42,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:14:42,952 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:14:42,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42 WrapperNode [2022-10-15 18:14:42,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:14:42,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:14:42,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:14:42,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:14:42,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:42,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:42,994 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-10-15 18:14:42,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:14:42,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:14:42,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:14:42,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:14:43,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,019 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:14:43,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:14:43,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:14:43,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:14:43,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (1/1) ... [2022-10-15 18:14:43,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:14:43,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:43,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:14:43,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:14:43,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:14:43,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:14:43,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:14:43,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:14:43,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:14:43,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:14:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:14:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:14:43,211 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:14:43,214 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:14:43,422 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:14:43,456 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:14:43,457 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 18:14:43,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:14:43 BoogieIcfgContainer [2022-10-15 18:14:43,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:14:43,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:14:43,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:14:43,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:14:43,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:14:42" (1/3) ... [2022-10-15 18:14:43,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b22b367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:14:43, skipping insertion in model container [2022-10-15 18:14:43,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:42" (2/3) ... [2022-10-15 18:14:43,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b22b367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:14:43, skipping insertion in model container [2022-10-15 18:14:43,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:14:43" (3/3) ... [2022-10-15 18:14:43,493 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2022-10-15 18:14:43,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:14:43,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-10-15 18:14:43,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:14:43,681 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;@f46c680, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:14:43,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-10-15 18:14:43,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 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 18:14:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:14:43,713 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:43,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:14:43,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-15 18:14:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:43,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248573025] [2022-10-15 18:14:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248573025] [2022-10-15 18:14:44,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248573025] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:44,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:14:44,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:14:44,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714479756] [2022-10-15 18:14:44,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:44,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:44,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:44,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:44,185 INFO L87 Difference]: Start difference. First operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:44,282 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-10-15 18:14:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:44,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:14:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:44,299 INFO L225 Difference]: With dead ends: 31 [2022-10-15 18:14:44,299 INFO L226 Difference]: Without dead ends: 29 [2022-10-15 18:14:44,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:44,310 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:44,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-15 18:14:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-15 18:14:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-10-15 18:14:44,346 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 4 [2022-10-15 18:14:44,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:44,347 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-10-15 18:14:44,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-10-15 18:14:44,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:14:44,348 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:44,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:14:44,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:14:44,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-15 18:14:44,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:44,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866440785] [2022-10-15 18:14:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:44,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:44,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866440785] [2022-10-15 18:14:44,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866440785] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:44,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:14:44,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:14:44,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140296446] [2022-10-15 18:14:44,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:44,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:44,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:44,554 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:44,621 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-10-15 18:14:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:14:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:44,624 INFO L225 Difference]: With dead ends: 32 [2022-10-15 18:14:44,624 INFO L226 Difference]: Without dead ends: 32 [2022-10-15 18:14:44,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:44,627 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:44,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-15 18:14:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-10-15 18:14:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-10-15 18:14:44,643 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 4 [2022-10-15 18:14:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:44,644 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-10-15 18:14:44,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-10-15 18:14:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 18:14:44,646 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:44,646 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 18:14:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:14:44,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-15 18:14:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:44,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229076907] [2022-10-15 18:14:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:44,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229076907] [2022-10-15 18:14:44,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229076907] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290016865] [2022-10-15 18:14:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:44,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:44,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:44,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:44,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:14:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:45,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:14:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:45,121 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:14:45,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 18:14:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:45,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:45,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290016865] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:45,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:45,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 18:14:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862214478] [2022-10-15 18:14:45,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:45,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:14:45,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:14:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:14:45,276 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:45,479 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2022-10-15 18:14:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:14:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 18:14:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:45,482 INFO L225 Difference]: With dead ends: 71 [2022-10-15 18:14:45,482 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 18:14:45,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:14:45,485 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:45,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 34 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 18:14:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2022-10-15 18:14:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-10-15 18:14:45,495 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 7 [2022-10-15 18:14:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:45,495 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-10-15 18:14:45,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-10-15 18:14:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 18:14:45,497 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:45,497 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:45,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 18:14:45,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:45,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1447545997, now seen corresponding path program 1 times [2022-10-15 18:14:45,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:45,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002307714] [2022-10-15 18:14:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002307714] [2022-10-15 18:14:45,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002307714] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541663467] [2022-10-15 18:14:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:45,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:45,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:46,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:14:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:46,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:14:46,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:46,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:46,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541663467] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:46,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:46,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-15 18:14:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650547924] [2022-10-15 18:14:46,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 18:14:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:46,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 18:14:46,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:14:46,168 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:46,267 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-10-15 18:14:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:14:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-15 18:14:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:46,270 INFO L225 Difference]: With dead ends: 89 [2022-10-15 18:14:46,270 INFO L226 Difference]: Without dead ends: 89 [2022-10-15 18:14:46,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 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 18:14:46,272 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:46,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 129 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-15 18:14:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-10-15 18:14:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.25) internal successors, (75), 66 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 18:14:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-10-15 18:14:46,281 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 19 [2022-10-15 18:14:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:46,282 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-10-15 18:14:46,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-10-15 18:14:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 18:14:46,284 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:46,284 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:46,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:46,497 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 18:14:46,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:46,500 INFO L85 PathProgramCache]: Analyzing trace with hash -657080717, now seen corresponding path program 2 times [2022-10-15 18:14:46,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:46,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136489271] [2022-10-15 18:14:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:46,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:46,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:46,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136489271] [2022-10-15 18:14:46,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136489271] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:46,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956921289] [2022-10-15 18:14:46,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:46,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:46,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:46,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:46,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:14:46,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:14:46,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:14:46,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:46,944 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-15 18:14:46,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:14:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-10-15 18:14:47,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:14:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956921289] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:47,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:14:47,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2022-10-15 18:14:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279882643] [2022-10-15 18:14:47,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:47,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:14:47,054 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:47,078 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-10-15 18:14:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:47,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-15 18:14:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:47,084 INFO L225 Difference]: With dead ends: 65 [2022-10-15 18:14:47,084 INFO L226 Difference]: Without dead ends: 65 [2022-10-15 18:14:47,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:14:47,090 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:47,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:14:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-15 18:14:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-10-15 18:14:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-10-15 18:14:47,110 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 37 [2022-10-15 18:14:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:47,114 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-10-15 18:14:47,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-10-15 18:14:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 18:14:47,115 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:47,116 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:47,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:47,329 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 18:14:47,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:47,331 INFO L85 PathProgramCache]: Analyzing trace with hash -657080716, now seen corresponding path program 1 times [2022-10-15 18:14:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256280399] [2022-10-15 18:14:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:47,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256280399] [2022-10-15 18:14:47,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256280399] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834203388] [2022-10-15 18:14:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:47,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:47,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:47,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:47,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:14:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 18:14:47,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:47,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:48,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834203388] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:48,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:48,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-15 18:14:48,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518357510] [2022-10-15 18:14:48,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:48,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 18:14:48,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 18:14:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:14:48,090 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:48,291 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-10-15 18:14:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 18:14:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-15 18:14:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:48,293 INFO L225 Difference]: With dead ends: 149 [2022-10-15 18:14:48,294 INFO L226 Difference]: Without dead ends: 149 [2022-10-15 18:14:48,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 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 18:14:48,295 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 211 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:48,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 158 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:14:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-10-15 18:14:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2022-10-15 18:14:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-10-15 18:14:48,305 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 37 [2022-10-15 18:14:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:48,306 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-10-15 18:14:48,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-10-15 18:14:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-15 18:14:48,309 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:48,309 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:48,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:48,522 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 18:14:48,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1573219212, now seen corresponding path program 2 times [2022-10-15 18:14:48,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:48,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163262457] [2022-10-15 18:14:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:48,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:49,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:49,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163262457] [2022-10-15 18:14:49,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163262457] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:49,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782222855] [2022-10-15 18:14:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:49,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:49,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:49,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:49,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:14:49,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:14:49,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:49,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:14:49,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:14:49,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:14:49,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:14:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-10-15 18:14:49,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:14:49,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782222855] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:49,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:14:49,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [25] total 26 [2022-10-15 18:14:49,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180204020] [2022-10-15 18:14:49,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:49,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:49,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:14:49,991 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:50,013 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-10-15 18:14:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:50,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-10-15 18:14:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:50,017 INFO L225 Difference]: With dead ends: 121 [2022-10-15 18:14:50,017 INFO L226 Difference]: Without dead ends: 121 [2022-10-15 18:14:50,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:14:50,018 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:50,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:14:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-15 18:14:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-10-15 18:14:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1551724137931034) internal successors, (134), 120 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-10-15 18:14:50,027 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 73 [2022-10-15 18:14:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:50,027 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-10-15 18:14:50,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-10-15 18:14:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-15 18:14:50,029 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:50,029 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:50,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:50,242 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 18:14:50,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 556228912, now seen corresponding path program 1 times [2022-10-15 18:14:50,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:50,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111117808] [2022-10-15 18:14:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:50,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:51,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111117808] [2022-10-15 18:14:51,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111117808] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230054555] [2022-10-15 18:14:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:51,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:51,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:51,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:14:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 18:14:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:51,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:52,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230054555] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:52,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:52,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-10-15 18:14:52,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311108183] [2022-10-15 18:14:52,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-15 18:14:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-15 18:14:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:14:52,260 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:52,583 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2022-10-15 18:14:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-15 18:14:52,583 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 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 77 [2022-10-15 18:14:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:52,585 INFO L225 Difference]: With dead ends: 250 [2022-10-15 18:14:52,585 INFO L226 Difference]: Without dead ends: 250 [2022-10-15 18:14:52,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:14:52,587 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 444 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:52,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 156 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:14:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-10-15 18:14:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 213. [2022-10-15 18:14:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.125) internal successors, (234), 212 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 234 transitions. [2022-10-15 18:14:52,597 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 234 transitions. Word has length 77 [2022-10-15 18:14:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:52,598 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 234 transitions. [2022-10-15 18:14:52,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 234 transitions. [2022-10-15 18:14:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-10-15 18:14:52,601 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:52,601 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:52,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:52,814 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 18:14:52,815 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash -341701328, now seen corresponding path program 2 times [2022-10-15 18:14:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:52,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926843611] [2022-10-15 18:14:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:52,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:55,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:55,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926843611] [2022-10-15 18:14:55,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926843611] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:55,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885886901] [2022-10-15 18:14:55,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:55,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:55,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:55,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:14:55,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:14:55,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:55,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-15 18:14:55,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:56,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:58,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885886901] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:58,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:58,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-10-15 18:14:58,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875415523] [2022-10-15 18:14:58,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-10-15 18:14:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:58,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-10-15 18:14:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 18:14:58,952 INFO L87 Difference]: Start difference. First operand 213 states and 234 transitions. Second operand has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:59,930 INFO L93 Difference]: Finished difference Result 484 states and 486 transitions. [2022-10-15 18:14:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-10-15 18:14:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 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 149 [2022-10-15 18:14:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:59,936 INFO L225 Difference]: With dead ends: 484 [2022-10-15 18:14:59,937 INFO L226 Difference]: Without dead ends: 484 [2022-10-15 18:14:59,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 18:14:59,940 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 869 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:59,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 382 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 18:14:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-10-15 18:14:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 417. [2022-10-15 18:14:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 412 states have (on average 1.1213592233009708) internal successors, (462), 416 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 462 transitions. [2022-10-15 18:14:59,957 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 462 transitions. Word has length 149 [2022-10-15 18:14:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:59,958 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 462 transitions. [2022-10-15 18:14:59,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 462 transitions. [2022-10-15 18:14:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-10-15 18:14:59,969 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:59,969 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:15:00,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:15:00,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:15:00,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:15:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:15:00,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1405917904, now seen corresponding path program 3 times [2022-10-15 18:15:00,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:15:00,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120042133] [2022-10-15 18:15:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:15:00,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:15:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:15:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:15:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:15:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120042133] [2022-10-15 18:15:09,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120042133] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:15:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332391602] [2022-10-15 18:15:09,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:15:09,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:15:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:15:09,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:15:09,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:15:09,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:15:09,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:15:09,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 18:15:09,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:15:09,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:15:09,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:15:09,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:15:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-10-15 18:15:11,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:15:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-10-15 18:15:13,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332391602] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:15:13,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:15:13,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 3, 3] total 101 [2022-10-15 18:15:13,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083168632] [2022-10-15 18:15:13,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:15:13,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-10-15 18:15:13,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:15:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-10-15 18:15:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5432, Unknown=0, NotChecked=0, Total=10100 [2022-10-15 18:15:13,552 INFO L87 Difference]: Start difference. First operand 417 states and 462 transitions. Second operand has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:15:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:15:21,811 INFO L93 Difference]: Finished difference Result 473 states and 475 transitions. [2022-10-15 18:15:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-10-15 18:15:21,811 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 0 states have call successors, (0), 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 293 [2022-10-15 18:15:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:15:21,814 INFO L225 Difference]: With dead ends: 473 [2022-10-15 18:15:21,814 INFO L226 Difference]: Without dead ends: 473 [2022-10-15 18:15:21,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6151 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=15522, Invalid=27950, Unknown=0, NotChecked=0, Total=43472 [2022-10-15 18:15:21,827 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1037 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 18:15:21,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 302 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 18:15:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-10-15 18:15:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 420. [2022-10-15 18:15:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.1132530120481927) internal successors, (462), 419 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:15:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 462 transitions. [2022-10-15 18:15:21,838 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 462 transitions. Word has length 293 [2022-10-15 18:15:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:15:21,839 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 462 transitions. [2022-10-15 18:15:21,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:15:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 462 transitions. [2022-10-15 18:15:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-10-15 18:15:21,844 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:15:21,845 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-10-15 18:15:21,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:15:22,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 18:15:22,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:15:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:15:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash 711930364, now seen corresponding path program 4 times [2022-10-15 18:15:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:15:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051341699] [2022-10-15 18:15:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:15:22,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:15:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:15:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13526 backedges. 0 proven. 13490 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-15 18:15:30,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:15:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051341699] [2022-10-15 18:15:30,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051341699] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:15:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128755381] [2022-10-15 18:15:30,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 18:15:30,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:15:30,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:15:30,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:15:30,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process