/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:10:08,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:10:08,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:10:08,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:10:08,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:10:08,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:10:08,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:10:08,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:10:08,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:10:08,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:10:08,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:10:08,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:10:08,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:10:08,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:10:08,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:10:08,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:10:08,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:10:08,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:10:08,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:10:08,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:10:08,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:10:08,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:10:08,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:10:08,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:10:08,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:10:08,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:10:08,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:10:08,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:10:08,685 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 18:10:08,739 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:10:08,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:10:08,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:10:08,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:10:08,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:10:08,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:10:08,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:10:08,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:10:08,745 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:10:08,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:10:08,746 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:10:08,746 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:10:08,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:10:08,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:10:08,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:10:08,747 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:10:08,747 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:10:08,747 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:10:08,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:10:08,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:10:08,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:10:08,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:10:08,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:10:08,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:10:08,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:10:08,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:10:08,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:10:08,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:10:08,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:10:08,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:10:08,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:10:09,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:10:09,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:10:09,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:10:09,143 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:10:09,145 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:10:09,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-10-15 18:10:09,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6c5bdd06/bfbd4c4f9edf4e26849c47a47fc10975/FLAG8bc0a8341 [2022-10-15 18:10:09,836 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:10:09,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-10-15 18:10:09,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6c5bdd06/bfbd4c4f9edf4e26849c47a47fc10975/FLAG8bc0a8341 [2022-10-15 18:10:10,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6c5bdd06/bfbd4c4f9edf4e26849c47a47fc10975 [2022-10-15 18:10:10,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:10:10,180 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:10:10,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:10:10,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:10:10,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:10:10,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e71f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10, skipping insertion in model container [2022-10-15 18:10:10,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:10:10,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:10:10,365 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2022-10-15 18:10:10,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:10:10,400 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:10:10,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2022-10-15 18:10:10,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:10:10,453 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:10:10,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10 WrapperNode [2022-10-15 18:10:10,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:10:10,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:10:10,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:10:10,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:10:10,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,504 INFO L138 Inliner]: procedures = 16, calls = 44, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2022-10-15 18:10:10,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:10:10,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:10:10,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:10:10,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:10:10,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,536 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:10:10,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:10:10,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:10:10,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:10:10,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (1/1) ... [2022-10-15 18:10:10,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:10:10,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:10,585 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 18:10:10,604 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 18:10:10,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:10:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:10:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:10:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:10:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:10:10,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:10:10,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:10:10,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:10:10,753 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:10:10,756 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:10:11,279 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:10:11,290 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:10:11,290 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-10-15 18:10:11,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:10:11 BoogieIcfgContainer [2022-10-15 18:10:11,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:10:11,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:10:11,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:10:11,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:10:11,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:10:10" (1/3) ... [2022-10-15 18:10:11,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cf56a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:10:11, skipping insertion in model container [2022-10-15 18:10:11,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:10:10" (2/3) ... [2022-10-15 18:10:11,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cf56a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:10:11, skipping insertion in model container [2022-10-15 18:10:11,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:10:11" (3/3) ... [2022-10-15 18:10:11,302 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2022-10-15 18:10:11,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:10:11,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-10-15 18:10:11,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:10:11,395 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;@470542be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:10:11,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-10-15 18:10:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 90 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:10:11,409 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:11,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:10:11,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:10:11,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420540777] [2022-10-15 18:10:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:12,794 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 18:10:12,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:12,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420540777] [2022-10-15 18:10:12,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420540777] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:12,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:12,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:12,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145368174] [2022-10-15 18:10:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:12,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:12,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:12,845 INFO L87 Difference]: Start difference. First operand has 91 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 90 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 18:10:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:12,957 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-10-15 18:10:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:12,960 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 18:10:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:12,970 INFO L225 Difference]: With dead ends: 88 [2022-10-15 18:10:12,971 INFO L226 Difference]: Without dead ends: 86 [2022-10-15 18:10:12,973 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 18:10:12,977 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 88 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:12,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 63 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-15 18:10:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-10-15 18:10:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.690909090909091) internal successors, (93), 85 states have internal predecessors, (93), 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 18:10:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-10-15 18:10:13,023 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 4 [2022-10-15 18:10:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:13,024 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-10-15 18:10:13,024 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 18:10:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-10-15 18:10:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:10:13,025 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:13,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:10:13,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:10:13,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:10:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:13,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361322401] [2022-10-15 18:10:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:13,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:13,762 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 18:10:13,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:13,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361322401] [2022-10-15 18:10:13,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361322401] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:13,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:13,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:13,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385107371] [2022-10-15 18:10:13,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:13,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:13,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:13,773 INFO L87 Difference]: Start difference. First operand 86 states and 93 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 18:10:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:13,899 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-10-15 18:10:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:13,903 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 18:10:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:13,905 INFO L225 Difference]: With dead ends: 94 [2022-10-15 18:10:13,905 INFO L226 Difference]: Without dead ends: 94 [2022-10-15 18:10:13,906 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 18:10:13,908 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:13,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 143 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-15 18:10:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2022-10-15 18:10:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 87 states have internal predecessors, (95), 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 18:10:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-10-15 18:10:13,920 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 4 [2022-10-15 18:10:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:13,921 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-10-15 18:10:13,921 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 18:10:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-10-15 18:10:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 18:10:13,922 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:13,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 18:10:13,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:10:13,922 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash 889659654, now seen corresponding path program 1 times [2022-10-15 18:10:13,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070261645] [2022-10-15 18:10:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:14,020 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 18:10:14,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:14,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070261645] [2022-10-15 18:10:14,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070261645] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:14,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:14,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:14,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909668315] [2022-10-15 18:10:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:14,039 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:10:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:14,097 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-10-15 18:10:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-15 18:10:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:14,099 INFO L225 Difference]: With dead ends: 86 [2022-10-15 18:10:14,100 INFO L226 Difference]: Without dead ends: 86 [2022-10-15 18:10:14,100 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 18:10:14,102 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:14,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-15 18:10:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-10-15 18:10:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.631578947368421) internal successors, (93), 85 states have internal predecessors, (93), 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 18:10:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-10-15 18:10:14,111 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 6 [2022-10-15 18:10:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:14,111 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-10-15 18:10:14,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:10:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-10-15 18:10:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 18:10:14,112 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:14,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 18:10:14,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 18:10:14,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:14,114 INFO L85 PathProgramCache]: Analyzing trace with hash 889659655, now seen corresponding path program 1 times [2022-10-15 18:10:14,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:14,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72107806] [2022-10-15 18:10:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:14,348 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 18:10:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72107806] [2022-10-15 18:10:14,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72107806] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:14,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:10:14,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:10:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899819606] [2022-10-15 18:10:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:10:14,351 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:10:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:14,426 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-10-15 18:10:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-15 18:10:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:14,428 INFO L225 Difference]: With dead ends: 90 [2022-10-15 18:10:14,428 INFO L226 Difference]: Without dead ends: 90 [2022-10-15 18:10:14,428 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 18:10:14,430 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:14,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 140 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-15 18:10:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-10-15 18:10:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 87 states have internal predecessors, (95), 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 18:10:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-10-15 18:10:14,440 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 6 [2022-10-15 18:10:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:14,440 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-10-15 18:10:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:10:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-10-15 18:10:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-15 18:10:14,441 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:14,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:14,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:10:14,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:14,443 INFO L85 PathProgramCache]: Analyzing trace with hash 719163786, now seen corresponding path program 1 times [2022-10-15 18:10:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:14,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696356375] [2022-10-15 18:10:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:15,129 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 18:10:15,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:15,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696356375] [2022-10-15 18:10:15,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696356375] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:15,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992900092] [2022-10-15 18:10:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:15,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:15,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:15,134 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 18:10:15,159 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 18:10:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:15,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-15 18:10:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:15,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:15,575 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-10-15 18:10:15,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 56 [2022-10-15 18:10:15,629 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-10-15 18:10:15,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 80 [2022-10-15 18:10:15,846 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 18:10:15,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:16,083 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 18:10:16,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992900092] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:16,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:16,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-10-15 18:10:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262486662] [2022-10-15 18:10:16,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:16,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:10:16,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:10:16,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:10:16,101 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:16,443 INFO L93 Difference]: Finished difference Result 250 states and 273 transitions. [2022-10-15 18:10:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:10:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-15 18:10:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:16,446 INFO L225 Difference]: With dead ends: 250 [2022-10-15 18:10:16,447 INFO L226 Difference]: Without dead ends: 250 [2022-10-15 18:10:16,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:10:16,449 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 264 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:16,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 318 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:10:16,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-10-15 18:10:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 104. [2022-10-15 18:10:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 103 states have internal predecessors, (115), 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 18:10:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2022-10-15 18:10:16,461 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 10 [2022-10-15 18:10:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:16,461 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2022-10-15 18:10:16,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:10:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2022-10-15 18:10:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-15 18:10:16,462 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:16,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:16,508 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 18:10:16,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:16,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:16,683 INFO L85 PathProgramCache]: Analyzing trace with hash -373337781, now seen corresponding path program 1 times [2022-10-15 18:10:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:16,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061728309] [2022-10-15 18:10:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:16,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:16,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061728309] [2022-10-15 18:10:16,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061728309] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:16,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405155008] [2022-10-15 18:10:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:16,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:16,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:16,901 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 18:10:16,925 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 18:10:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:17,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-15 18:10:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:17,244 INFO L356 Elim1Store]: treesize reduction 315, result has 24.1 percent of original size [2022-10-15 18:10:17,244 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 6 case distinctions, treesize of input 24 treesize of output 105 [2022-10-15 18:10:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:17,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:17,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405155008] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:17,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:17,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-15 18:10:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950835344] [2022-10-15 18:10:17,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:10:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:10:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:10:17,523 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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 18:10:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:17,789 INFO L93 Difference]: Finished difference Result 250 states and 273 transitions. [2022-10-15 18:10:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:10:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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 12 [2022-10-15 18:10:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:17,791 INFO L225 Difference]: With dead ends: 250 [2022-10-15 18:10:17,791 INFO L226 Difference]: Without dead ends: 250 [2022-10-15 18:10:17,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:10:17,793 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 247 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:17,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 321 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:10:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-10-15 18:10:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 106. [2022-10-15 18:10:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 105 states have internal predecessors, (115), 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 18:10:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2022-10-15 18:10:17,803 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 12 [2022-10-15 18:10:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:17,803 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2022-10-15 18:10:17,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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 18:10:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2022-10-15 18:10:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 18:10:17,805 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:17,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:17,846 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 18:10:18,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-15 18:10:18,019 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1824164062, now seen corresponding path program 1 times [2022-10-15 18:10:18,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:18,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285449005] [2022-10-15 18:10:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:18,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:10:18,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285449005] [2022-10-15 18:10:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285449005] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280045091] [2022-10-15 18:10:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:18,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:18,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:18,155 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 18:10:18,175 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 18:10:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:10:18,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:18,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:18,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280045091] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:18,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:18,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-10-15 18:10:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037147101] [2022-10-15 18:10:18,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:18,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 18:10:18,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 18:10:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-10-15 18:10:18,331 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 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 18:10:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:18,701 INFO L93 Difference]: Finished difference Result 168 states and 175 transitions. [2022-10-15 18:10:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 18:10:18,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 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 18 [2022-10-15 18:10:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:18,704 INFO L225 Difference]: With dead ends: 168 [2022-10-15 18:10:18,704 INFO L226 Difference]: Without dead ends: 168 [2022-10-15 18:10:18,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:18,705 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 210 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:18,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 164 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:10:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-10-15 18:10:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2022-10-15 18:10:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 121 states have internal predecessors, (131), 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 18:10:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2022-10-15 18:10:18,713 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 18 [2022-10-15 18:10:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:18,713 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2022-10-15 18:10:18,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 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 18:10:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2022-10-15 18:10:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 18:10:18,715 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:18,715 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1] [2022-10-15 18:10:18,756 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 18:10:18,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:18,929 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1808870570, now seen corresponding path program 2 times [2022-10-15 18:10:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081596895] [2022-10-15 18:10:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:20,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081596895] [2022-10-15 18:10:20,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081596895] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52243977] [2022-10-15 18:10:20,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:20,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:20,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:20,017 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 18:10:20,038 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 18:10:20,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:10:20,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:20,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 56 conjunts are in the unsatisfiable core [2022-10-15 18:10:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:20,340 INFO L356 Elim1Store]: treesize reduction 60, result has 47.8 percent of original size [2022-10-15 18:10:20,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 60 [2022-10-15 18:10:20,390 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-10-15 18:10:20,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 76 [2022-10-15 18:10:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:20,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:21,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52243977] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:21,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:21,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-10-15 18:10:21,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425643136] [2022-10-15 18:10:21,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:10:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:10:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:21,034 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 17 states, 16 states have (on average 5.125) internal successors, (82), 17 states have internal predecessors, (82), 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 18:10:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:21,685 INFO L93 Difference]: Finished difference Result 468 states and 507 transitions. [2022-10-15 18:10:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:10:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 17 states have internal predecessors, (82), 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 28 [2022-10-15 18:10:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:21,690 INFO L225 Difference]: With dead ends: 468 [2022-10-15 18:10:21,691 INFO L226 Difference]: Without dead ends: 468 [2022-10-15 18:10:21,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2022-10-15 18:10:21,692 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 852 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:21,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 491 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-15 18:10:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-10-15 18:10:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 147. [2022-10-15 18:10:21,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.38135593220339) internal successors, (163), 146 states have internal predecessors, (163), 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 18:10:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2022-10-15 18:10:21,703 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 28 [2022-10-15 18:10:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:21,703 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2022-10-15 18:10:21,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.125) internal successors, (82), 17 states have internal predecessors, (82), 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 18:10:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2022-10-15 18:10:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 18:10:21,705 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:21,705 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:10:21,744 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 18:10:21,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:21,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1137135639, now seen corresponding path program 2 times [2022-10-15 18:10:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406369274] [2022-10-15 18:10:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:21,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:22,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406369274] [2022-10-15 18:10:22,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406369274] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:22,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231379338] [2022-10-15 18:10:22,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:22,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:22,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:22,233 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 18:10:22,235 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 18:10:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:10:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:10:22,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:22,500 INFO L356 Elim1Store]: treesize reduction 315, result has 24.1 percent of original size [2022-10-15 18:10:22,501 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 6 case distinctions, treesize of input 24 treesize of output 105 [2022-10-15 18:10:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-15 18:10:22,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-15 18:10:23,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231379338] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:23,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:23,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-10-15 18:10:23,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030902719] [2022-10-15 18:10:23,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:23,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 18:10:23,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:23,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 18:10:23,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:10:23,160 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 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 18:10:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:23,584 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2022-10-15 18:10:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 18:10:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 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) Word has length 30 [2022-10-15 18:10:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:23,587 INFO L225 Difference]: With dead ends: 146 [2022-10-15 18:10:23,587 INFO L226 Difference]: Without dead ends: 146 [2022-10-15 18:10:23,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-10-15 18:10:23,589 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 244 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:23,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 156 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:10:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-10-15 18:10:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-10-15 18:10:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 145 states have internal predecessors, (157), 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 18:10:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2022-10-15 18:10:23,595 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 30 [2022-10-15 18:10:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:23,596 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2022-10-15 18:10:23,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 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 18:10:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2022-10-15 18:10:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-15 18:10:23,597 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:23,598 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:23,630 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 18:10:23,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:23,812 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash -373858887, now seen corresponding path program 1 times [2022-10-15 18:10:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:23,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944093644] [2022-10-15 18:10:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:23,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:23,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:23,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944093644] [2022-10-15 18:10:23,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944093644] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:23,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259079741] [2022-10-15 18:10:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:23,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:23,994 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 18:10:24,017 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 18:10:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:24,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:10:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:24,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:24,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259079741] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:24,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:24,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:10:24,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136755253] [2022-10-15 18:10:24,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:24,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:10:24,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:10:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:10:24,300 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 18:10:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:24,394 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2022-10-15 18:10:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:10:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 43 [2022-10-15 18:10:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:24,397 INFO L225 Difference]: With dead ends: 172 [2022-10-15 18:10:24,397 INFO L226 Difference]: Without dead ends: 172 [2022-10-15 18:10:24,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 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 18:10:24,398 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 112 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:24,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 275 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-10-15 18:10:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-10-15 18:10:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.2695035460992907) internal successors, (179), 168 states have internal predecessors, (179), 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 18:10:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2022-10-15 18:10:24,404 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 43 [2022-10-15 18:10:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:24,405 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2022-10-15 18:10:24,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 18:10:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2022-10-15 18:10:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-15 18:10:24,407 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:24,408 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1] [2022-10-15 18:10:24,440 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 18:10:24,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:24,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash -317127186, now seen corresponding path program 3 times [2022-10-15 18:10:24,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:24,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295346211] [2022-10-15 18:10:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:24,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:26,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:26,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295346211] [2022-10-15 18:10:26,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295346211] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:26,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351130841] [2022-10-15 18:10:26,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:10:26,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:26,626 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 18:10:26,638 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 18:10:26,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:10:26,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:26,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-15 18:10:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:26,951 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-10-15 18:10:26,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 18 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 48 [2022-10-15 18:10:26,977 INFO L356 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-10-15 18:10:26,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 88 [2022-10-15 18:10:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-10-15 18:10:27,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:10:27,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351130841] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:27,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:10:27,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2022-10-15 18:10:27,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035707639] [2022-10-15 18:10:27,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:27,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 18:10:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 18:10:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:10:27,382 INFO L87 Difference]: Start difference. First operand 169 states and 179 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 18:10:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:27,475 INFO L93 Difference]: Finished difference Result 168 states and 175 transitions. [2022-10-15 18:10:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 18:10:27,477 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 64 [2022-10-15 18:10:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:27,478 INFO L225 Difference]: With dead ends: 168 [2022-10-15 18:10:27,478 INFO L226 Difference]: Without dead ends: 168 [2022-10-15 18:10:27,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:10:27,480 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 243 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:27,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 113 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-10-15 18:10:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-10-15 18:10:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 167 states have internal predecessors, (175), 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 18:10:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 175 transitions. [2022-10-15 18:10:27,484 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 175 transitions. Word has length 64 [2022-10-15 18:10:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:27,484 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 175 transitions. [2022-10-15 18:10:27,485 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 18:10:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 175 transitions. [2022-10-15 18:10:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-15 18:10:27,486 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:27,486 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:27,520 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 18:10:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:27,701 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:27,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1988592537, now seen corresponding path program 2 times [2022-10-15 18:10:27,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:27,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825434949] [2022-10-15 18:10:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:27,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:28,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825434949] [2022-10-15 18:10:28,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825434949] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:28,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947621490] [2022-10-15 18:10:28,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:28,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:28,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:28,190 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 18:10:28,209 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 18:10:28,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:10:28,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 18:10:28,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:28,492 INFO L356 Elim1Store]: treesize reduction 365, result has 13.7 percent of original size [2022-10-15 18:10:28,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 224 treesize of output 256 [2022-10-15 18:10:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-10-15 18:10:28,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:10:28,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947621490] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:28,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:10:28,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 18 [2022-10-15 18:10:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457221965] [2022-10-15 18:10:28,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:28,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:10:28,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:28,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:10:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:10:28,722 INFO L87 Difference]: Start difference. First operand 168 states and 175 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 18:10:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:28,758 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-10-15 18:10:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:10:28,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 91 [2022-10-15 18:10:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:28,760 INFO L225 Difference]: With dead ends: 166 [2022-10-15 18:10:28,760 INFO L226 Difference]: Without dead ends: 166 [2022-10-15 18:10:28,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-10-15 18:10:28,762 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:28,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 59 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:10:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-10-15 18:10:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-10-15 18:10:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 141 states have (on average 1.2269503546099292) internal successors, (173), 165 states have internal predecessors, (173), 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 18:10:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2022-10-15 18:10:28,767 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 91 [2022-10-15 18:10:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:28,768 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2022-10-15 18:10:28,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 18:10:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2022-10-15 18:10:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-15 18:10:28,769 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:28,769 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:28,813 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 18:10:28,983 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,SelfDestructingSolverStorable11 [2022-10-15 18:10:28,984 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1988592538, now seen corresponding path program 1 times [2022-10-15 18:10:28,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:28,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233604253] [2022-10-15 18:10:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:28,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:29,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:29,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233604253] [2022-10-15 18:10:29,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233604253] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:29,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152923679] [2022-10-15 18:10:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:29,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:29,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:29,496 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 18:10:29,519 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 18:10:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:10:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:29,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:30,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152923679] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:30,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:30,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:10:30,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086654602] [2022-10-15 18:10:30,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:10:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:10:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:10:30,217 INFO L87 Difference]: Start difference. First operand 166 states and 173 transitions. Second operand has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 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 18:10:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:30,430 INFO L93 Difference]: Finished difference Result 262 states and 269 transitions. [2022-10-15 18:10:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:10:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 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 91 [2022-10-15 18:10:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:30,432 INFO L225 Difference]: With dead ends: 262 [2022-10-15 18:10:30,432 INFO L226 Difference]: Without dead ends: 262 [2022-10-15 18:10:30,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 166 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 18:10:30,434 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 225 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:30,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 538 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:10:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-10-15 18:10:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-10-15 18:10:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 237 states have (on average 1.1350210970464134) internal successors, (269), 261 states have internal predecessors, (269), 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 18:10:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 269 transitions. [2022-10-15 18:10:30,441 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 269 transitions. Word has length 91 [2022-10-15 18:10:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:30,441 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 269 transitions. [2022-10-15 18:10:30,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 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 18:10:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 269 transitions. [2022-10-15 18:10:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-10-15 18:10:30,443 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:30,444 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:30,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 18:10:30,658 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,SelfDestructingSolverStorable12 [2022-10-15 18:10:30,659 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1499328678, now seen corresponding path program 2 times [2022-10-15 18:10:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531101495] [2022-10-15 18:10:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:30,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:10:32,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:32,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531101495] [2022-10-15 18:10:32,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531101495] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:32,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211856937] [2022-10-15 18:10:32,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:32,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:32,202 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 18:10:32,204 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 18:10:32,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:10:32,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-15 18:10:32,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:10:32,547 INFO L356 Elim1Store]: treesize reduction 155, result has 31.1 percent of original size [2022-10-15 18:10:32,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 75 [2022-10-15 18:10:32,588 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-10-15 18:10:32,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 300 treesize of output 286 [2022-10-15 18:10:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2022-10-15 18:10:33,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:10:33,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211856937] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:10:33,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:10:33,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [33] total 35 [2022-10-15 18:10:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431438263] [2022-10-15 18:10:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:10:33,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:10:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:33,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:10:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 18:10:33,432 INFO L87 Difference]: Start difference. First operand 262 states and 269 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 18:10:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:33,564 INFO L93 Difference]: Finished difference Result 302 states and 309 transitions. [2022-10-15 18:10:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:10:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 187 [2022-10-15 18:10:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:33,567 INFO L225 Difference]: With dead ends: 302 [2022-10-15 18:10:33,567 INFO L226 Difference]: Without dead ends: 302 [2022-10-15 18:10:33,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 18:10:33,569 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 156 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:33,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 74 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:10:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-10-15 18:10:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 264. [2022-10-15 18:10:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 239 states have (on average 1.1338912133891212) internal successors, (271), 263 states have internal predecessors, (271), 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 18:10:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 271 transitions. [2022-10-15 18:10:33,576 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 271 transitions. Word has length 187 [2022-10-15 18:10:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:33,577 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 271 transitions. [2022-10-15 18:10:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 18:10:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 271 transitions. [2022-10-15 18:10:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-10-15 18:10:33,579 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:33,579 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:33,619 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 18:10:33,794 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,SelfDestructingSolverStorable13 [2022-10-15 18:10:33,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1575812029, now seen corresponding path program 1 times [2022-10-15 18:10:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:33,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938890519] [2022-10-15 18:10:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:10:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:35,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938890519] [2022-10-15 18:10:35,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938890519] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:35,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686300336] [2022-10-15 18:10:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:35,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:35,401 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:10:35,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 18:10:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 18:10:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:10:35,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:10:37,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686300336] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:37,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:37,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-10-15 18:10:37,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299134371] [2022-10-15 18:10:37,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:37,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-15 18:10:37,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:37,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-15 18:10:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:10:37,394 INFO L87 Difference]: Start difference. First operand 264 states and 271 transitions. Second operand has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 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 18:10:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:37,806 INFO L93 Difference]: Finished difference Result 456 states and 463 transitions. [2022-10-15 18:10:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-10-15 18:10:37,807 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 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 191 [2022-10-15 18:10:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:37,809 INFO L225 Difference]: With dead ends: 456 [2022-10-15 18:10:37,810 INFO L226 Difference]: Without dead ends: 456 [2022-10-15 18:10:37,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-10-15 18:10:37,812 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 465 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:37,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 523 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:10:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-10-15 18:10:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-10-15 18:10:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 431 states have (on average 1.074245939675174) internal successors, (463), 455 states have internal predecessors, (463), 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 18:10:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 463 transitions. [2022-10-15 18:10:37,822 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 463 transitions. Word has length 191 [2022-10-15 18:10:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:37,822 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 463 transitions. [2022-10-15 18:10:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.8307692307692305) internal successors, (379), 65 states have internal predecessors, (379), 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 18:10:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 463 transitions. [2022-10-15 18:10:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-10-15 18:10:37,829 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:37,829 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:37,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-15 18:10:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 18:10:38,042 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:38,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:38,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2043456707, now seen corresponding path program 2 times [2022-10-15 18:10:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:38,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121725749] [2022-10-15 18:10:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:38,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:10:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:10:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:10:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121725749] [2022-10-15 18:10:43,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121725749] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:10:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817701778] [2022-10-15 18:10:43,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:10:43,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:10:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:10:43,422 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:10:43,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-15 18:10:43,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:10:43,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:10:43,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-15 18:10:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:10:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:10:44,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:10:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11410 backedges. 0 proven. 11408 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:10:50,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817701778] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:10:50,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:10:50,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2022-10-15 18:10:50,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585008417] [2022-10-15 18:10:50,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:10:50,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-10-15 18:10:50,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:10:50,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-10-15 18:10:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-15 18:10:50,233 INFO L87 Difference]: Start difference. First operand 456 states and 463 transitions. Second operand has 129 states, 129 states have (on average 5.9147286821705425) internal successors, (763), 129 states have internal predecessors, (763), 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 18:10:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:10:51,424 INFO L93 Difference]: Finished difference Result 840 states and 847 transitions. [2022-10-15 18:10:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-10-15 18:10:51,425 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 5.9147286821705425) internal successors, (763), 129 states have internal predecessors, (763), 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 383 [2022-10-15 18:10:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:10:51,429 INFO L225 Difference]: With dead ends: 840 [2022-10-15 18:10:51,429 INFO L226 Difference]: Without dead ends: 840 [2022-10-15 18:10:51,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2022-10-15 18:10:51,435 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 945 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 18:10:51,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 1044 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 18:10:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-10-15 18:10:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 840. [2022-10-15 18:10:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 815 states have (on average 1.0392638036809816) internal successors, (847), 839 states have internal predecessors, (847), 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 18:10:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 847 transitions. [2022-10-15 18:10:51,452 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 847 transitions. Word has length 383 [2022-10-15 18:10:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:10:51,453 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 847 transitions. [2022-10-15 18:10:51,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 5.9147286821705425) internal successors, (763), 129 states have internal predecessors, (763), 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 18:10:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 847 transitions. [2022-10-15 18:10:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2022-10-15 18:10:51,474 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:10:51,474 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:10:51,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-15 18:10:51,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-15 18:10:51,689 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-15 18:10:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:10:51,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1684275773, now seen corresponding path program 3 times [2022-10-15 18:10:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:10:51,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133102352] [2022-10-15 18:10:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:10:51,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:10:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat