/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/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:08:36,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:08:36,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:08:36,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:08:36,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:08:36,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:08:36,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:08:36,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:08:36,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:08:36,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:08:36,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:08:36,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:08:36,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:08:36,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:08:36,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:08:36,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:08:36,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:08:36,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:08:36,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:08:36,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:08:36,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:08:36,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:08:36,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:08:36,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:08:36,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:08:36,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:08:36,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:08:36,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:08:36,265 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 18:08:36,333 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:08:36,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:08:36,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:08:36,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:08:36,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:08:36,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:08:36,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:08:36,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:08:36,342 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:08:36,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:08:36,344 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:08:36,345 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:08:36,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:08:36,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:08:36,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:08:36,346 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:08:36,346 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:08:36,346 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:08:36,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:08:36,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:08:36,347 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:08:36,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:08:36,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:08:36,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:08:36,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:08:36,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:08:36,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:08:36,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:08:36,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:08:36,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:08:36,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:08:36,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:08:36,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:08:36,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:08:36,902 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:08:36,903 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:08:36,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2022-10-15 18:08:37,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e22f2db/fb7f0b8ec1364fb290116b219c1dfe01/FLAG5046cdc1b [2022-10-15 18:08:37,784 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:08:37,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2022-10-15 18:08:37,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e22f2db/fb7f0b8ec1364fb290116b219c1dfe01/FLAG5046cdc1b [2022-10-15 18:08:38,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e22f2db/fb7f0b8ec1364fb290116b219c1dfe01 [2022-10-15 18:08:38,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:08:38,118 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:08:38,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:08:38,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:08:38,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:08:38,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e17492c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38, skipping insertion in model container [2022-10-15 18:08:38,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:08:38,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:08:38,326 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/data_structures_set_multi_proc_trivial_ground.i[838,851] [2022-10-15 18:08:38,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:08:38,374 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:08:38,390 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/data_structures_set_multi_proc_trivial_ground.i[838,851] [2022-10-15 18:08:38,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:08:38,424 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:08:38,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38 WrapperNode [2022-10-15 18:08:38,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:08:38,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:08:38,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:08:38,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:08:38,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,484 INFO L138 Inliner]: procedures = 18, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 158 [2022-10-15 18:08:38,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:08:38,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:08:38,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:08:38,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:08:38,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,527 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:08:38,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:08:38,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:08:38,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:08:38,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (1/1) ... [2022-10-15 18:08:38,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:08:38,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:38,592 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 18:08:38,603 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 18:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:08:38,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-15 18:08:38,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-15 18:08:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:08:38,752 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:08:38,755 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:08:39,261 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:08:39,270 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:08:39,271 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-10-15 18:08:39,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:08:39 BoogieIcfgContainer [2022-10-15 18:08:39,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:08:39,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:08:39,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:08:39,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:08:39,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:08:38" (1/3) ... [2022-10-15 18:08:39,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5bc258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:08:39, skipping insertion in model container [2022-10-15 18:08:39,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:38" (2/3) ... [2022-10-15 18:08:39,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5bc258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:08:39, skipping insertion in model container [2022-10-15 18:08:39,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:08:39" (3/3) ... [2022-10-15 18:08:39,292 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2022-10-15 18:08:39,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:08:39,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-10-15 18:08:39,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:08:39,393 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;@2e1381be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:08:39,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-10-15 18:08:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 85 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 18:08:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:08:39,408 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:39,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:08:39,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:08:39,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:39,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975086711] [2022-10-15 18:08:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:39,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:39,754 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 18:08:39,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:39,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975086711] [2022-10-15 18:08:39,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975086711] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:39,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:08:39,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:08:39,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667750885] [2022-10-15 18:08:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:08:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:08:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:08:39,824 INFO L87 Difference]: Start difference. First operand has 90 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 85 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:39,973 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-10-15 18:08:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:08:39,982 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 18:08:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:39,992 INFO L225 Difference]: With dead ends: 83 [2022-10-15 18:08:39,993 INFO L226 Difference]: Without dead ends: 81 [2022-10-15 18:08:39,996 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 18:08:40,001 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 77 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:40,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 74 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:08:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-15 18:08:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-10-15 18:08:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 76 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 18:08:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-10-15 18:08:40,060 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 4 [2022-10-15 18:08:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:40,061 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-10-15 18:08:40,061 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 18:08:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-10-15 18:08:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:08:40,062 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:40,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:08:40,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:08:40,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:08:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:40,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108234281] [2022-10-15 18:08:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:40,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:40,251 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 18:08:40,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:40,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108234281] [2022-10-15 18:08:40,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108234281] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:40,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:08:40,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:08:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710185069] [2022-10-15 18:08:40,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:08:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:08:40,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:08:40,257 INFO L87 Difference]: Start difference. First operand 81 states and 94 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 18:08:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:40,402 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-10-15 18:08:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:08:40,403 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 18:08:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:40,404 INFO L225 Difference]: With dead ends: 85 [2022-10-15 18:08:40,405 INFO L226 Difference]: Without dead ends: 85 [2022-10-15 18:08:40,405 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 18:08:40,407 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:40,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 140 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:08:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-15 18:08:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-10-15 18:08:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.5) internal successors, (90), 78 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 18:08:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-10-15 18:08:40,421 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 4 [2022-10-15 18:08:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:40,422 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-10-15 18:08:40,422 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 18:08:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-10-15 18:08:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:08:40,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:40,423 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:40,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:08:40,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 18:08:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:40,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59354249] [2022-10-15 18:08:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:40,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:40,681 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 18:08:40,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59354249] [2022-10-15 18:08:40,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59354249] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:08:40,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070881496] [2022-10-15 18:08:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:40,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:40,686 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 18:08:40,716 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 18:08:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:08:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:08:40,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:08:40,970 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 18:08:40,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:08:41,065 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 18:08:41,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070881496] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:08:41,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:08:41,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 18:08:41,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84950695] [2022-10-15 18:08:41,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:08:41,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:08:41,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:41,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:08:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:08:41,070 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:41,776 INFO L93 Difference]: Finished difference Result 326 states and 392 transitions. [2022-10-15 18:08:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:08:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 18:08:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:41,782 INFO L225 Difference]: With dead ends: 326 [2022-10-15 18:08:41,783 INFO L226 Difference]: Without dead ends: 326 [2022-10-15 18:08:41,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 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 18:08:41,785 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:41,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 429 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:08:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-10-15 18:08:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 174. [2022-10-15 18:08:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 143 states have (on average 1.4335664335664335) internal successors, (205), 160 states have internal predecessors, (205), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-15 18:08:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-10-15 18:08:41,812 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 8 [2022-10-15 18:08:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:41,813 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-10-15 18:08:41,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-10-15 18:08:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 18:08:41,814 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:41,815 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:41,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:08:42,029 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 18:08:42,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1143818169, now seen corresponding path program 1 times [2022-10-15 18:08:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:42,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022025857] [2022-10-15 18:08:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-15 18:08:42,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022025857] [2022-10-15 18:08:42,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022025857] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:42,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:08:42,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:08:42,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298121937] [2022-10-15 18:08:42,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:42,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:08:42,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:08:42,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:08:42,139 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:42,178 INFO L93 Difference]: Finished difference Result 171 states and 226 transitions. [2022-10-15 18:08:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:08:42,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 18:08:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:42,181 INFO L225 Difference]: With dead ends: 171 [2022-10-15 18:08:42,181 INFO L226 Difference]: Without dead ends: 171 [2022-10-15 18:08:42,182 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 18:08:42,184 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 56 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:42,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:08:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-10-15 18:08:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-10-15 18:08:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 143 states have (on average 1.4125874125874125) internal successors, (202), 157 states have internal predecessors, (202), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-15 18:08:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 226 transitions. [2022-10-15 18:08:42,209 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 226 transitions. Word has length 24 [2022-10-15 18:08:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:42,209 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 226 transitions. [2022-10-15 18:08:42,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 226 transitions. [2022-10-15 18:08:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 18:08:42,211 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:42,211 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:42,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:08:42,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1143818170, now seen corresponding path program 1 times [2022-10-15 18:08:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:42,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709354031] [2022-10-15 18:08:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:42,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:08:42,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709354031] [2022-10-15 18:08:42,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709354031] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:08:42,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083275765] [2022-10-15 18:08:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:42,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:42,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:42,437 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 18:08:42,444 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 18:08:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:08:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:08:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:08:42,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:08:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:08:42,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083275765] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:08:42,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:08:42,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-15 18:08:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735561945] [2022-10-15 18:08:42,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:08:42,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 18:08:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:42,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 18:08:42,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:08:42,654 INFO L87 Difference]: Start difference. First operand 171 states and 226 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 18:08:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:43,171 INFO L93 Difference]: Finished difference Result 784 states and 948 transitions. [2022-10-15 18:08:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:08:43,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 18:08:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:43,177 INFO L225 Difference]: With dead ends: 784 [2022-10-15 18:08:43,177 INFO L226 Difference]: Without dead ends: 784 [2022-10-15 18:08:43,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 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 18:08:43,179 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1717 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:43,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1747 Valid, 770 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:08:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-10-15 18:08:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 195. [2022-10-15 18:08:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 167 states have (on average 1.3532934131736527) internal successors, (226), 181 states have internal predecessors, (226), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-15 18:08:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 250 transitions. [2022-10-15 18:08:43,207 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 250 transitions. Word has length 24 [2022-10-15 18:08:43,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:43,208 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 250 transitions. [2022-10-15 18:08:43,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 18:08:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 250 transitions. [2022-10-15 18:08:43,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-15 18:08:43,210 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:43,210 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:43,253 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 18:08:43,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:43,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1405730636, now seen corresponding path program 2 times [2022-10-15 18:08:43,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:43,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498222901] [2022-10-15 18:08:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:43,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:08:43,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498222901] [2022-10-15 18:08:43,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498222901] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:08:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140922301] [2022-10-15 18:08:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:08:43,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:43,723 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 18:08:43,731 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 18:08:43,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:08:43,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:08:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 18:08:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:08:43,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:08:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-15 18:08:43,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:08:43,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140922301] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:43,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:08:43,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2022-10-15 18:08:43,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240691174] [2022-10-15 18:08:43,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:43,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:08:43,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:08:43,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:08:43,839 INFO L87 Difference]: Start difference. First operand 195 states and 250 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:43,886 INFO L93 Difference]: Finished difference Result 199 states and 254 transitions. [2022-10-15 18:08:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:08:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-10-15 18:08:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:43,889 INFO L225 Difference]: With dead ends: 199 [2022-10-15 18:08:43,889 INFO L226 Difference]: Without dead ends: 199 [2022-10-15 18:08:43,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 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 18:08:43,893 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:43,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 143 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:08:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-10-15 18:08:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2022-10-15 18:08:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 169 states have (on average 1.349112426035503) internal successors, (228), 183 states have internal predecessors, (228), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-15 18:08:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 252 transitions. [2022-10-15 18:08:43,921 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 252 transitions. Word has length 48 [2022-10-15 18:08:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:43,922 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 252 transitions. [2022-10-15 18:08:43,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 252 transitions. [2022-10-15 18:08:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-15 18:08:43,927 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:43,927 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:43,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-15 18:08:44,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:44,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1405772122, now seen corresponding path program 1 times [2022-10-15 18:08:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:44,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865367820] [2022-10-15 18:08:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-10-15 18:08:44,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:44,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865367820] [2022-10-15 18:08:44,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865367820] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:44,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:08:44,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 18:08:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978934286] [2022-10-15 18:08:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:44,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:08:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:08:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:08:44,275 INFO L87 Difference]: Start difference. First operand 197 states and 252 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:44,336 INFO L93 Difference]: Finished difference Result 190 states and 231 transitions. [2022-10-15 18:08:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:08:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-10-15 18:08:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:44,338 INFO L225 Difference]: With dead ends: 190 [2022-10-15 18:08:44,338 INFO L226 Difference]: Without dead ends: 190 [2022-10-15 18:08:44,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:08:44,340 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 42 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:44,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 165 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:08:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-15 18:08:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2022-10-15 18:08:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 154 states have (on average 1.3311688311688312) internal successors, (205), 166 states have internal predecessors, (205), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 18:08:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 221 transitions. [2022-10-15 18:08:44,348 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 221 transitions. Word has length 48 [2022-10-15 18:08:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:44,348 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 221 transitions. [2022-10-15 18:08:44,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 221 transitions. [2022-10-15 18:08:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-15 18:08:44,350 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:44,350 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:44,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 18:08:44,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:44,351 INFO L85 PathProgramCache]: Analyzing trace with hash -821816881, now seen corresponding path program 1 times [2022-10-15 18:08:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:44,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859112251] [2022-10-15 18:08:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:44,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:08:44,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:44,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859112251] [2022-10-15 18:08:44,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859112251] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:08:44,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917023937] [2022-10-15 18:08:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:44,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:44,669 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 18:08:44,684 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 18:08:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 18:08:44,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:08:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:08:44,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:08:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:08:45,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917023937] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:08:45,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:08:45,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-15 18:08:45,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457403151] [2022-10-15 18:08:45,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:08:45,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 18:08:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 18:08:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:08:45,117 INFO L87 Difference]: Start difference. First operand 176 states and 221 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:46,075 INFO L93 Difference]: Finished difference Result 1272 states and 1525 transitions. [2022-10-15 18:08:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 18:08:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-10-15 18:08:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:46,097 INFO L225 Difference]: With dead ends: 1272 [2022-10-15 18:08:46,097 INFO L226 Difference]: Without dead ends: 1272 [2022-10-15 18:08:46,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 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 18:08:46,102 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 2266 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2310 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:46,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2310 Valid, 1121 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:08:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-10-15 18:08:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 224. [2022-10-15 18:08:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 202 states have (on average 1.2524752475247525) internal successors, (253), 214 states have internal predecessors, (253), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 18:08:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 269 transitions. [2022-10-15 18:08:46,151 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 269 transitions. Word has length 52 [2022-10-15 18:08:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:46,155 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 269 transitions. [2022-10-15 18:08:46,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 269 transitions. [2022-10-15 18:08:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-15 18:08:46,161 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:46,161 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:46,210 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 18:08:46,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:46,362 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:46,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash -587166477, now seen corresponding path program 2 times [2022-10-15 18:08:46,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:46,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130010083] [2022-10-15 18:08:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:46,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:08:47,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:47,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130010083] [2022-10-15 18:08:47,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130010083] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:08:47,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799605953] [2022-10-15 18:08:47,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:08:47,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:47,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:47,372 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 18:08:47,399 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 18:08:47,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:08:47,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:08:47,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 18:08:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:08:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:08:47,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:08:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:08:48,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799605953] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:08:48,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:08:48,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-10-15 18:08:48,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440636321] [2022-10-15 18:08:48,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:08:48,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-15 18:08:48,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:48,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-15 18:08:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:08:48,599 INFO L87 Difference]: Start difference. First operand 224 states and 269 transitions. Second operand has 49 states, 49 states have (on average 3.9591836734693877) internal successors, (194), 49 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 18:08:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:51,654 INFO L93 Difference]: Finished difference Result 2592 states and 3109 transitions. [2022-10-15 18:08:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-15 18:08:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.9591836734693877) internal successors, (194), 49 states have internal predecessors, (194), 0 states have call successors, (0), 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 100 [2022-10-15 18:08:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:51,670 INFO L225 Difference]: With dead ends: 2592 [2022-10-15 18:08:51,670 INFO L226 Difference]: Without dead ends: 2592 [2022-10-15 18:08:51,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:08:51,673 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 5976 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6068 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:51,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6068 Valid, 2230 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-15 18:08:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-10-15 18:08:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 320. [2022-10-15 18:08:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 298 states have (on average 1.1711409395973154) internal successors, (349), 310 states have internal predecessors, (349), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 18:08:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 365 transitions. [2022-10-15 18:08:51,721 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 365 transitions. Word has length 100 [2022-10-15 18:08:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:51,721 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 365 transitions. [2022-10-15 18:08:51,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.9591836734693877) internal successors, (194), 49 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 18:08:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 365 transitions. [2022-10-15 18:08:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-10-15 18:08:51,730 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:51,732 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:51,778 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 18:08:51,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:51,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1995408581, now seen corresponding path program 3 times [2022-10-15 18:08:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907882027] [2022-10-15 18:08:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:51,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4188 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:08:54,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:54,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907882027] [2022-10-15 18:08:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907882027] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:08:54,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742933522] [2022-10-15 18:08:54,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:08:54,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:54,919 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 18:08:54,925 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 18:08:55,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:08:55,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:08:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:08:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:08:55,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:08:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4188 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-10-15 18:08:55,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:08:55,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742933522] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:55,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:08:55,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [49] total 52 [2022-10-15 18:08:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565240952] [2022-10-15 18:08:55,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:55,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 18:08:55,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 18:08:55,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-10-15 18:08:55,182 INFO L87 Difference]: Start difference. First operand 320 states and 365 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:55,286 INFO L93 Difference]: Finished difference Result 382 states and 447 transitions. [2022-10-15 18:08:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:08:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-10-15 18:08:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:55,291 INFO L225 Difference]: With dead ends: 382 [2022-10-15 18:08:55,291 INFO L226 Difference]: Without dead ends: 382 [2022-10-15 18:08:55,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-10-15 18:08:55,294 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 135 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:55,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 123 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:08:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-10-15 18:08:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 329. [2022-10-15 18:08:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 308 states have (on average 1.1785714285714286) internal successors, (363), 319 states have internal predecessors, (363), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-15 18:08:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 379 transitions. [2022-10-15 18:08:55,304 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 379 transitions. Word has length 196 [2022-10-15 18:08:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:55,305 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 379 transitions. [2022-10-15 18:08:55,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 379 transitions. [2022-10-15 18:08:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-10-15 18:08:55,308 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:55,309 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:08:55,349 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 18:08:55,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:55,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2022-10-15 18:08:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2032282617, now seen corresponding path program 1 times [2022-10-15 18:08:55,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:55,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971378947] [2022-10-15 18:08:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:55,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-10-15 18:08:55,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971378947] [2022-10-15 18:08:55,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971378947] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:08:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398677321] [2022-10-15 18:08:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:55,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:08:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:55,810 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 18:08:55,836 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 18:08:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-15 18:08:56,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:08:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:08:57,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:09:00,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398677321] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:00,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:00,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 49, 49] total 98 [2022-10-15 18:09:00,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476598751] [2022-10-15 18:09:00,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:00,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-10-15 18:09:00,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-10-15 18:09:00,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-10-15 18:09:00,488 INFO L87 Difference]: Start difference. First operand 329 states and 379 transitions. Second operand has 98 states, 98 states have (on average 4.061224489795919) internal successors, (398), 98 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)