/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/sanfoundry_43_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:08:56,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:08:56,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:08:56,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:08:56,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:08:56,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:08:56,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:08:56,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:08:56,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:08:56,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:08:56,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:08:56,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:08:56,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:08:56,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:08:56,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:08:56,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:08:56,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:08:56,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:08:56,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:08:56,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:08:56,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:08:56,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:08:56,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:08:56,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:08:56,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:08:56,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:08:56,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:08:56,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:08:56,169 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 18:08:56,205 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:08:56,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:08:56,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:08:56,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:08:56,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:08:56,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:08:56,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:08:56,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:08:56,210 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:08:56,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:08:56,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:08:56,211 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:08:56,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:08:56,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:08:56,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:08:56,212 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:08:56,212 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:08:56,212 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:08:56,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:08:56,213 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:08:56,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:08:56,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:08:56,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:08:56,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:08:56,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:08:56,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:08:56,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:08:56,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:08:56,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:08:56,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:08:56,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:08:56,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:08:56,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:08:56,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:08:56,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:08:56,669 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:08:56,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_43_ground.i [2022-10-15 18:08:56,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdb1dc2e2/f8fe5baf20984b048d5b3ff19916aeb6/FLAG50f59c4d5 [2022-10-15 18:08:57,488 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:08:57,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_43_ground.i [2022-10-15 18:08:57,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdb1dc2e2/f8fe5baf20984b048d5b3ff19916aeb6/FLAG50f59c4d5 [2022-10-15 18:08:57,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdb1dc2e2/f8fe5baf20984b048d5b3ff19916aeb6 [2022-10-15 18:08:57,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:08:57,847 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:08:57,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:08:57,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:08:57,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:08:57,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:08:57" (1/1) ... [2022-10-15 18:08:57,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc3a077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:57, skipping insertion in model container [2022-10-15 18:08:57,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:08:57" (1/1) ... [2022-10-15 18:08:57,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:08:57,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:08:58,072 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/sanfoundry_43_ground.i[813,826] [2022-10-15 18:08:58,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:08:58,106 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:08:58,122 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/sanfoundry_43_ground.i[813,826] [2022-10-15 18:08:58,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:08:58,150 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:08:58,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58 WrapperNode [2022-10-15 18:08:58,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:08:58,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:08:58,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:08:58,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:08:58,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,198 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-10-15 18:08:58,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:08:58,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:08:58,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:08:58,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:08:58,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:08:58,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:08:58,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:08:58,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:08:58,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (1/1) ... [2022-10-15 18:08:58,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:08:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:08:58,286 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 18:08:58,303 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 18:08:58,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:08:58,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:08:58,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:08:58,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:08:58,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:08:58,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:08:58,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:08:58,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:08:58,442 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:08:58,445 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:08:58,741 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:08:58,753 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:08:58,754 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 18:08:58,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:08:58 BoogieIcfgContainer [2022-10-15 18:08:58,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:08:58,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:08:58,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:08:58,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:08:58,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:08:57" (1/3) ... [2022-10-15 18:08:58,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab9a4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:08:58, skipping insertion in model container [2022-10-15 18:08:58,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:08:58" (2/3) ... [2022-10-15 18:08:58,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab9a4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:08:58, skipping insertion in model container [2022-10-15 18:08:58,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:08:58" (3/3) ... [2022-10-15 18:08:58,785 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_43_ground.i [2022-10-15 18:08:58,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:08:58,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-10-15 18:08:58,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:08:58,935 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;@d30f2e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:08:58,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-10-15 18:08:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:08:58,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:58,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:08:58,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:08:58,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:08:58,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:59,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685090136] [2022-10-15 18:08:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:59,464 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 18:08:59,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685090136] [2022-10-15 18:08:59,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685090136] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:59,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:08:59,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:08:59,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292383918] [2022-10-15 18:08:59,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:59,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:08:59,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:08:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:08:59,524 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 18:08:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:08:59,601 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-10-15 18:08:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:08:59,605 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 18:08:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:08:59,618 INFO L225 Difference]: With dead ends: 31 [2022-10-15 18:08:59,618 INFO L226 Difference]: Without dead ends: 29 [2022-10-15 18:08:59,621 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 18:08:59,627 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:08:59,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:08:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-15 18:08:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-15 18:08:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:08:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-10-15 18:08:59,697 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 4 [2022-10-15 18:08:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:08:59,699 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-10-15 18:08:59,699 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 18:08:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-10-15 18:08:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:08:59,700 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:08:59,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:08:59,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:08:59,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:08:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:08:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:08:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:08:59,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169479973] [2022-10-15 18:08:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:08:59,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:08:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:08:59,946 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 18:08:59,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:08:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169479973] [2022-10-15 18:08:59,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169479973] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:08:59,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:08:59,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:08:59,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460777218] [2022-10-15 18:08:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:08:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:08:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:08:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:08:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:08:59,961 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:00,025 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-10-15 18:09:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:09:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:09:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:00,028 INFO L225 Difference]: With dead ends: 33 [2022-10-15 18:09:00,028 INFO L226 Difference]: Without dead ends: 33 [2022-10-15 18:09:00,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:09:00,031 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:00,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-15 18:09:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-10-15 18:09:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-10-15 18:09:00,040 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 4 [2022-10-15 18:09:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:00,041 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-10-15 18:09:00,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-10-15 18:09:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:09:00,042 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:00,043 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:00,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:09:00,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 18:09:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:00,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491039231] [2022-10-15 18:09:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:00,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:00,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491039231] [2022-10-15 18:09:00,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491039231] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:00,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240896133] [2022-10-15 18:09:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:00,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:00,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:00,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:00,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:09:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 18:09:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:09:00,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:09:00,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:09:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:00,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:00,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240896133] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:00,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:00,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:09:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956159302] [2022-10-15 18:09:00,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:09:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:09:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:09:00,739 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:00,909 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-10-15 18:09:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:09:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-15 18:09:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:00,912 INFO L225 Difference]: With dead ends: 83 [2022-10-15 18:09:00,912 INFO L226 Difference]: Without dead ends: 83 [2022-10-15 18:09:00,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:09:00,914 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:00,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 71 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-10-15 18:09:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 43. [2022-10-15 18:09:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 42 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 18:09:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-10-15 18:09:00,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 8 [2022-10-15 18:09:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:00,925 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-10-15 18:09:00,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-10-15 18:09:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 18:09:00,926 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:00,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:00,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:01,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash -144029225, now seen corresponding path program 1 times [2022-10-15 18:09:01,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:01,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679782390] [2022-10-15 18:09:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:09:01,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:01,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679782390] [2022-10-15 18:09:01,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679782390] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:01,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:09:01,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:09:01,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422246425] [2022-10-15 18:09:01,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:01,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:09:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:09:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:09:01,219 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 4 states, 3 states have (on average 4.0) 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 18:09:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:01,253 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-10-15 18:09:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:09:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) 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 14 [2022-10-15 18:09:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:01,255 INFO L225 Difference]: With dead ends: 42 [2022-10-15 18:09:01,255 INFO L226 Difference]: Without dead ends: 42 [2022-10-15 18:09:01,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:09:01,257 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:01,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:09:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-15 18:09:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-10-15 18:09:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-10-15 18:09:01,265 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 14 [2022-10-15 18:09:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-10-15 18:09:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) 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 18:09:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-10-15 18:09:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 18:09:01,267 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:01,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:01,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:09:01,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -144029224, now seen corresponding path program 1 times [2022-10-15 18:09:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319745169] [2022-10-15 18:09:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:01,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:01,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319745169] [2022-10-15 18:09:01,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319745169] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:01,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432009734] [2022-10-15 18:09:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:01,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:01,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:01,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:01,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:09:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:01,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:09:01,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:01,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:01,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432009734] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:01,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:01,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 18:09:01,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586963025] [2022-10-15 18:09:01,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:01,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:09:01,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:01,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:09:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:09:01,501 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:01,547 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-10-15 18:09:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:09:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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 14 [2022-10-15 18:09:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:01,549 INFO L225 Difference]: With dead ends: 50 [2022-10-15 18:09:01,550 INFO L226 Difference]: Without dead ends: 50 [2022-10-15 18:09:01,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:09:01,552 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:01,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 147 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:09:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-15 18:09:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-10-15 18:09:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-10-15 18:09:01,559 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 14 [2022-10-15 18:09:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:01,560 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-10-15 18:09:01,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-10-15 18:09:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 18:09:01,561 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:01,561 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:09:01,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:01,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-15 18:09:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:01,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272883293] [2022-10-15 18:09:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:01,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:02,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:02,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272883293] [2022-10-15 18:09:02,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272883293] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656836455] [2022-10-15 18:09:02,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:09:02,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:02,058 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:02,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:09:02,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:09:02,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:02,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 18:09:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:02,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:09:02,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:09:02,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:09:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:02,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:09:02,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656836455] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:02,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:09:02,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:09:02,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388318640] [2022-10-15 18:09:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:09:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:09:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:09:02,464 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:02,544 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-10-15 18:09:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:09:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 18:09:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:02,546 INFO L225 Difference]: With dead ends: 48 [2022-10-15 18:09:02,547 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 18:09:02,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:09:02,549 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:02,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 36 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 18:09:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-15 18:09:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-10-15 18:09:02,557 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 20 [2022-10-15 18:09:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:02,558 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-10-15 18:09:02,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-10-15 18:09:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 18:09:02,560 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:02,560 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:02,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:02,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:02,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 744354788, now seen corresponding path program 2 times [2022-10-15 18:09:02,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921640876] [2022-10-15 18:09:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:09:02,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921640876] [2022-10-15 18:09:02,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921640876] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933258884] [2022-10-15 18:09:02,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:09:02,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:02,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:02,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:02,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:09:03,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:09:03,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 18:09:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:03,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:09:03,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:09:03,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:09:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 18:09:03,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:09:03,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933258884] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:03,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:09:03,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-10-15 18:09:03,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106245806] [2022-10-15 18:09:03,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:03,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:09:03,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:09:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:09:03,201 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:03,255 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-10-15 18:09:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:09:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-10-15 18:09:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:03,257 INFO L225 Difference]: With dead ends: 55 [2022-10-15 18:09:03,257 INFO L226 Difference]: Without dead ends: 55 [2022-10-15 18:09:03,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:09:03,259 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:03,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:09:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-15 18:09:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-10-15 18:09:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-10-15 18:09:03,265 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 30 [2022-10-15 18:09:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:03,266 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-10-15 18:09:03,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-10-15 18:09:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 18:09:03,267 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:03,268 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:03,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:03,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:03,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:03,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1600161919, now seen corresponding path program 1 times [2022-10-15 18:09:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591340677] [2022-10-15 18:09:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 18:09:03,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:03,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591340677] [2022-10-15 18:09:03,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591340677] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:03,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:09:03,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:09:03,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390694701] [2022-10-15 18:09:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:03,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:09:03,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:09:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:09:03,732 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:03,774 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-10-15 18:09:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:09:03,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-15 18:09:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:03,778 INFO L225 Difference]: With dead ends: 48 [2022-10-15 18:09:03,779 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 18:09:03,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:09:03,781 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:03,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:09:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 18:09:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-15 18:09:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-10-15 18:09:03,802 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 31 [2022-10-15 18:09:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:03,803 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-10-15 18:09:03,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-10-15 18:09:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 18:09:03,804 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:03,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:03,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-15 18:09:03,805 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1600161920, now seen corresponding path program 1 times [2022-10-15 18:09:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:03,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405564806] [2022-10-15 18:09:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 18:09:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405564806] [2022-10-15 18:09:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405564806] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:04,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:09:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:09:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015383518] [2022-10-15 18:09:04,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:04,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:09:04,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:09:04,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:09:04,035 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:04,080 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-10-15 18:09:04,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:09:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-15 18:09:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:04,085 INFO L225 Difference]: With dead ends: 51 [2022-10-15 18:09:04,086 INFO L226 Difference]: Without dead ends: 51 [2022-10-15 18:09:04,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:09:04,090 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:04,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:09:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-15 18:09:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-10-15 18:09:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-10-15 18:09:04,110 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 31 [2022-10-15 18:09:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:04,110 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-10-15 18:09:04,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-10-15 18:09:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-15 18:09:04,113 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:04,113 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:04,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 18:09:04,116 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash 853315811, now seen corresponding path program 1 times [2022-10-15 18:09:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:04,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139382899] [2022-10-15 18:09:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:04,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:04,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139382899] [2022-10-15 18:09:04,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139382899] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:04,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404060600] [2022-10-15 18:09:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:04,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:04,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:04,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:09:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:04,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:09:04,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:04,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:04,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404060600] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:04,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:04,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:09:04,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064010204] [2022-10-15 18:09:04,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:04,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:09:04,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:09:04,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:09:04,648 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:04,736 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-10-15 18:09:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:09:04,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 35 [2022-10-15 18:09:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:04,739 INFO L225 Difference]: With dead ends: 81 [2022-10-15 18:09:04,739 INFO L226 Difference]: Without dead ends: 81 [2022-10-15 18:09:04,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:09:04,741 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:04,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 100 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:04,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-15 18:09:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-10-15 18:09:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-10-15 18:09:04,759 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 35 [2022-10-15 18:09:04,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:04,760 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-10-15 18:09:04,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-10-15 18:09:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-15 18:09:04,770 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:04,770 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:04,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:04,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 18:09:04,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 583652299, now seen corresponding path program 2 times [2022-10-15 18:09:04,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:04,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899800852] [2022-10-15 18:09:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:04,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:05,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899800852] [2022-10-15 18:09:05,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899800852] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735039552] [2022-10-15 18:09:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:09:05,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:05,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:05,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:05,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:09:05,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:09:05,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:09:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:05,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:06,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735039552] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:06,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:06,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:09:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434418714] [2022-10-15 18:09:06,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:09:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:09:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:09:06,137 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:06,308 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2022-10-15 18:09:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:09:06,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 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 67 [2022-10-15 18:09:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:06,311 INFO L225 Difference]: With dead ends: 145 [2022-10-15 18:09:06,311 INFO L226 Difference]: Without dead ends: 145 [2022-10-15 18:09:06,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:09:06,313 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:06,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 138 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:09:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-10-15 18:09:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-10-15 18:09:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.05) internal successors, (147), 144 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-10-15 18:09:06,320 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 67 [2022-10-15 18:09:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:06,320 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-10-15 18:09:06,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-10-15 18:09:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-10-15 18:09:06,322 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:06,323 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:06,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:06,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:06,537 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1559004773, now seen corresponding path program 3 times [2022-10-15 18:09:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:06,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130479839] [2022-10-15 18:09:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:09:08,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:08,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130479839] [2022-10-15 18:09:08,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130479839] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:08,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565439797] [2022-10-15 18:09:08,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:09:08,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:08,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:08,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:08,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:09:08,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:09:08,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-15 18:09:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:09:08,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:09:08,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:09:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-10-15 18:09:08,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:09:08,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565439797] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:09:08,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:09:08,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [33] total 37 [2022-10-15 18:09:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341760949] [2022-10-15 18:09:08,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:09:08,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:09:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:08,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:09:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=793, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 18:09:08,976 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:09,133 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-10-15 18:09:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:09:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 131 [2022-10-15 18:09:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:09,136 INFO L225 Difference]: With dead ends: 146 [2022-10-15 18:09:09,136 INFO L226 Difference]: Without dead ends: 146 [2022-10-15 18:09:09,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2022-10-15 18:09:09,138 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:09,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:09:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-10-15 18:09:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-10-15 18:09:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.042857142857143) internal successors, (146), 143 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-10-15 18:09:09,144 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 131 [2022-10-15 18:09:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:09,144 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-10-15 18:09:09,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-10-15 18:09:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-10-15 18:09:09,146 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:09,146 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:09,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:09,361 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1084507735, now seen corresponding path program 1 times [2022-10-15 18:09:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:09,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416343292] [2022-10-15 18:09:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:09,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:09:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416343292] [2022-10-15 18:09:10,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416343292] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:10,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173102198] [2022-10-15 18:09:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:10,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:10,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:10,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:09:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:09:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:09:11,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:09:12,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173102198] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:12,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:12,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:09:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882623527] [2022-10-15 18:09:12,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:09:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:09:12,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:09:12,930 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:13,309 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2022-10-15 18:09:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:09:13,310 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-10-15 18:09:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:13,311 INFO L225 Difference]: With dead ends: 272 [2022-10-15 18:09:13,312 INFO L226 Difference]: Without dead ends: 272 [2022-10-15 18:09:13,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:09:13,315 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 279 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:13,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 224 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:09:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-10-15 18:09:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-10-15 18:09:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 268 states have (on average 1.0223880597014925) internal successors, (274), 271 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2022-10-15 18:09:13,322 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 132 [2022-10-15 18:09:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:13,323 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2022-10-15 18:09:13,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2022-10-15 18:09:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-10-15 18:09:13,326 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:13,326 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:13,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:13,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-15 18:09:13,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:13,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1896178185, now seen corresponding path program 2 times [2022-10-15 18:09:13,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:13,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689198363] [2022-10-15 18:09:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:13,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:09:18,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689198363] [2022-10-15 18:09:18,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689198363] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036296299] [2022-10-15 18:09:18,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:09:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:18,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:18,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 18:09:18,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:09:18,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:09:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 18:09:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:18,670 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:09:18,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 18:09:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7627 trivial. 0 not checked. [2022-10-15 18:09:20,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7627 trivial. 0 not checked. [2022-10-15 18:09:23,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036296299] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:23,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:23,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 73 [2022-10-15 18:09:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469806322] [2022-10-15 18:09:23,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:23,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-10-15 18:09:23,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-10-15 18:09:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2104, Invalid=3152, Unknown=0, NotChecked=0, Total=5256 [2022-10-15 18:09:23,697 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 73 states, 73 states have (on average 3.9452054794520546) internal successors, (288), 73 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:27,417 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2022-10-15 18:09:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-10-15 18:09:27,418 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9452054794520546) internal successors, (288), 73 states have internal predecessors, (288), 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 260 [2022-10-15 18:09:27,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:27,421 INFO L225 Difference]: With dead ends: 278 [2022-10-15 18:09:27,421 INFO L226 Difference]: Without dead ends: 278 [2022-10-15 18:09:27,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6352, Invalid=12830, Unknown=0, NotChecked=0, Total=19182 [2022-10-15 18:09:27,429 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 231 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:27,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 116 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:09:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-10-15 18:09:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2022-10-15 18:09:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 270 states have (on average 1.0185185185185186) internal successors, (275), 272 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2022-10-15 18:09:27,437 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 260 [2022-10-15 18:09:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:27,438 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2022-10-15 18:09:27,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9452054794520546) internal successors, (288), 73 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2022-10-15 18:09:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-10-15 18:09:27,442 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:27,443 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:27,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-10-15 18:09:27,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-15 18:09:27,657 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1772700345, now seen corresponding path program 1 times [2022-10-15 18:09:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:27,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981637605] [2022-10-15 18:09:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:27,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7876 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2022-10-15 18:09:28,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:09:28,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981637605] [2022-10-15 18:09:28,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981637605] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:09:28,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632131964] [2022-10-15 18:09:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:28,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:09:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:09:28,054 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:09:28,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 18:09:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:09:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-15 18:09:28,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:09:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7876 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:09:30,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:09:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7876 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:09:36,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632131964] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:09:36,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:09:36,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 66, 66] total 132 [2022-10-15 18:09:36,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848208811] [2022-10-15 18:09:36,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:09:36,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-10-15 18:09:36,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:09:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-10-15 18:09:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8390, Invalid=8902, Unknown=0, NotChecked=0, Total=17292 [2022-10-15 18:09:36,667 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 132 states, 132 states have (on average 4.03030303030303) internal successors, (532), 132 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:09:37,610 INFO L93 Difference]: Finished difference Result 542 states and 544 transitions. [2022-10-15 18:09:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-10-15 18:09:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 4.03030303030303) internal successors, (532), 132 states have internal predecessors, (532), 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 265 [2022-10-15 18:09:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:09:37,614 INFO L225 Difference]: With dead ends: 542 [2022-10-15 18:09:37,614 INFO L226 Difference]: Without dead ends: 542 [2022-10-15 18:09:37,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8390, Invalid=8902, Unknown=0, NotChecked=0, Total=17292 [2022-10-15 18:09:37,620 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 392 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:09:37,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 282 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 18:09:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-10-15 18:09:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 538. [2022-10-15 18:09:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 535 states have (on average 1.0093457943925233) internal successors, (540), 537 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 540 transitions. [2022-10-15 18:09:37,633 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 540 transitions. Word has length 265 [2022-10-15 18:09:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:09:37,633 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 540 transitions. [2022-10-15 18:09:37,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 4.03030303030303) internal successors, (532), 132 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:09:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 540 transitions. [2022-10-15 18:09:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-10-15 18:09:37,645 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:09:37,646 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 128, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:09:37,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 18:09:37,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 18:09:37,862 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-15 18:09:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:09:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash -413617759, now seen corresponding path program 2 times [2022-10-15 18:09:37,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:09:37,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624716188] [2022-10-15 18:09:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:09:37,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:09:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat