/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/termination-dietlibc/strtoul.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:56:06,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:56:06,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:56:06,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:56:06,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:56:06,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:56:06,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:56:06,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:56:06,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:56:06,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:56:06,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:56:06,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:56:06,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:56:06,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:56:06,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:56:06,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:56:06,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:56:06,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:56:06,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:56:06,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:56:06,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:56:06,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:56:06,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:56:06,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:56:06,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 17:56:06,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:56:06,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:56:06,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:56:06,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:56:06,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:56:06,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:56:06,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:56:06,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:56:06,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:56:06,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:56:06,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:56:06,528 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 17:56:06,596 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:56:06,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:56:06,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:56:06,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:56:06,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:56:06,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:56:06,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:56:06,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:56:06,603 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:56:06,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:56:06,604 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:56:06,604 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:56:06,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:56:06,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:56:06,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:56:06,605 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:56:06,605 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:56:06,605 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:56:06,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:56:06,606 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:56:06,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:56:06,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:56:06,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:56:06,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:56:06,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:56:06,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:56:06,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:56:06,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:56:06,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:56:06,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:56:06,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:56:07,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:56:07,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:56:07,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:56:07,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:56:07,118 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:56:07,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-dietlibc/strtoul.i [2022-10-15 17:56:07,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ff3548b/f183e1e062ce4eca8e237eff421d2f35/FLAG7494eac8b [2022-10-15 17:56:08,130 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:56:08,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-dietlibc/strtoul.i [2022-10-15 17:56:08,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ff3548b/f183e1e062ce4eca8e237eff421d2f35/FLAG7494eac8b [2022-10-15 17:56:08,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50ff3548b/f183e1e062ce4eca8e237eff421d2f35 [2022-10-15 17:56:08,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:56:08,429 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:56:08,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:56:08,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:56:08,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:56:08,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:56:08" (1/1) ... [2022-10-15 17:56:08,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e80e161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:08, skipping insertion in model container [2022-10-15 17:56:08,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:56:08" (1/1) ... [2022-10-15 17:56:08,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:56:08,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:56:08,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:56:08,991 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:56:09,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:56:09,157 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:56:09,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09 WrapperNode [2022-10-15 17:56:09,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:56:09,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:56:09,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:56:09,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:56:09,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,236 INFO L138 Inliner]: procedures = 116, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 153 [2022-10-15 17:56:09,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:56:09,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:56:09,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:56:09,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:56:09,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,273 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:56:09,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:56:09,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:56:09,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:56:09,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (1/1) ... [2022-10-15 17:56:09,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:56:09,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:09,326 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 17:56:09,340 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 17:56:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:56:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:56:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:56:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-15 17:56:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:56:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-15 17:56:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:56:09,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:56:09,554 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:56:09,557 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:56:10,091 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:56:10,101 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:56:10,101 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 17:56:10,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:56:10 BoogieIcfgContainer [2022-10-15 17:56:10,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:56:10,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:56:10,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:56:10,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:56:10,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:56:08" (1/3) ... [2022-10-15 17:56:10,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b4639a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:56:10, skipping insertion in model container [2022-10-15 17:56:10,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:56:09" (2/3) ... [2022-10-15 17:56:10,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b4639a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:56:10, skipping insertion in model container [2022-10-15 17:56:10,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:56:10" (3/3) ... [2022-10-15 17:56:10,115 INFO L112 eAbstractionObserver]: Analyzing ICFG strtoul.i [2022-10-15 17:56:10,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:56:10,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-10-15 17:56:10,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:56:10,208 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;@4ad16c7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:56:10,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-10-15 17:56:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 74 states have internal predecessors, (97), 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 17:56:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:56:10,222 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:10,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:56:10,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash 925784, now seen corresponding path program 1 times [2022-10-15 17:56:10,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:10,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386716528] [2022-10-15 17:56:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:10,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:10,425 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 17:56:10,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386716528] [2022-10-15 17:56:10,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386716528] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:10,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:10,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:56:10,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140648240] [2022-10-15 17:56:10,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:56:10,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:56:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:56:10,476 INFO L87 Difference]: Start difference. First operand has 75 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 74 states have internal predecessors, (97), 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 17:56:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:10,565 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-10-15 17:56:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:56:10,569 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 17:56:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:10,581 INFO L225 Difference]: With dead ends: 76 [2022-10-15 17:56:10,582 INFO L226 Difference]: Without dead ends: 73 [2022-10-15 17:56:10,584 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 17:56:10,590 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 2 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:10,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-15 17:56:10,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-15 17:56:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 72 states have internal predecessors, (91), 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 17:56:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2022-10-15 17:56:10,645 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 4 [2022-10-15 17:56:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:10,646 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2022-10-15 17:56:10,646 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 17:56:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2022-10-15 17:56:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:56:10,647 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:10,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:56:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:56:10,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash 28695889, now seen corresponding path program 1 times [2022-10-15 17:56:10,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:10,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151851522] [2022-10-15 17:56:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:10,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:10,794 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 17:56:10,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:10,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151851522] [2022-10-15 17:56:10,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151851522] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:10,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:10,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:56:10,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609493187] [2022-10-15 17:56:10,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:10,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:56:10,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:10,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:56:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:56:10,800 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:56:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:10,910 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-10-15 17:56:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:56:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-10-15 17:56:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:10,916 INFO L225 Difference]: With dead ends: 71 [2022-10-15 17:56:10,916 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 17:56:10,917 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 17:56:10,919 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:10,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 63 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 17:56:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-10-15 17:56:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 70 states have internal predecessors, (89), 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 17:56:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2022-10-15 17:56:10,938 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 5 [2022-10-15 17:56:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:10,938 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2022-10-15 17:56:10,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:56:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2022-10-15 17:56:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:56:10,939 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:10,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:56:10,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:56:10,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:10,941 INFO L85 PathProgramCache]: Analyzing trace with hash 28695890, now seen corresponding path program 1 times [2022-10-15 17:56:10,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:10,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358750631] [2022-10-15 17:56:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:11,104 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 17:56:11,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358750631] [2022-10-15 17:56:11,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358750631] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:11,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:11,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:56:11,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244922541] [2022-10-15 17:56:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:11,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:56:11,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:56:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:56:11,113 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:56:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:11,221 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-10-15 17:56:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:56:11,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-10-15 17:56:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:11,226 INFO L225 Difference]: With dead ends: 70 [2022-10-15 17:56:11,226 INFO L226 Difference]: Without dead ends: 70 [2022-10-15 17:56:11,227 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 17:56:11,232 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:11,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-15 17:56:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-10-15 17:56:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 69 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 17:56:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-10-15 17:56:11,256 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 5 [2022-10-15 17:56:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:11,257 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-10-15 17:56:11,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:56:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-10-15 17:56:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:56:11,258 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:11,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:56:11,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:56:11,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 28695943, now seen corresponding path program 1 times [2022-10-15 17:56:11,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:11,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241034252] [2022-10-15 17:56:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:11,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:11,473 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 17:56:11,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:11,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241034252] [2022-10-15 17:56:11,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241034252] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:11,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:11,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:56:11,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508153957] [2022-10-15 17:56:11,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:11,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:56:11,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:56:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:56:11,484 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 17:56:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:11,616 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-10-15 17:56:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:56:11,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-10-15 17:56:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:11,618 INFO L225 Difference]: With dead ends: 76 [2022-10-15 17:56:11,619 INFO L226 Difference]: Without dead ends: 76 [2022-10-15 17:56:11,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:56:11,621 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 7 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:11,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 200 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:11,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-15 17:56:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-10-15 17:56:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.82) internal successors, (91), 71 states have internal predecessors, (91), 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 17:56:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-10-15 17:56:11,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 5 [2022-10-15 17:56:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:11,632 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-10-15 17:56:11,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 17:56:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-10-15 17:56:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:56:11,633 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:11,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:56:11,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1806945494, now seen corresponding path program 1 times [2022-10-15 17:56:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:11,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122152559] [2022-10-15 17:56:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:11,865 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 17:56:11,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122152559] [2022-10-15 17:56:11,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122152559] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:11,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:11,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:56:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778878021] [2022-10-15 17:56:11,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:11,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:56:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:56:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:56:11,869 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 17:56:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:11,994 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2022-10-15 17:56:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:56:11,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:56:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:11,996 INFO L225 Difference]: With dead ends: 70 [2022-10-15 17:56:11,997 INFO L226 Difference]: Without dead ends: 70 [2022-10-15 17:56:11,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:56:11,999 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 125 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:11,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 62 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-15 17:56:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-10-15 17:56:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.64) internal successors, (82), 62 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 17:56:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-10-15 17:56:12,007 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 7 [2022-10-15 17:56:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:12,008 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-10-15 17:56:12,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 17:56:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-10-15 17:56:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:56:12,009 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:12,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:12,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:56:12,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1806945495, now seen corresponding path program 1 times [2022-10-15 17:56:12,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498946960] [2022-10-15 17:56:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:12,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:12,291 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 17:56:12,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:12,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498946960] [2022-10-15 17:56:12,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498946960] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:12,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:12,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:56:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355397603] [2022-10-15 17:56:12,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:12,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:56:12,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:12,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:56:12,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:56:12,295 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 17:56:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:12,528 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-10-15 17:56:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:56:12,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:56:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:12,531 INFO L225 Difference]: With dead ends: 107 [2022-10-15 17:56:12,531 INFO L226 Difference]: Without dead ends: 107 [2022-10-15 17:56:12,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:56:12,533 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 211 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:12,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 126 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:56:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-10-15 17:56:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2022-10-15 17:56:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.6081081081081081) internal successors, (119), 86 states have internal predecessors, (119), 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 17:56:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2022-10-15 17:56:12,542 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 7 [2022-10-15 17:56:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:12,543 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2022-10-15 17:56:12,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 17:56:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2022-10-15 17:56:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 17:56:12,544 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:12,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:12,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 17:56:12,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:12,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1307832464, now seen corresponding path program 1 times [2022-10-15 17:56:12,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:12,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159867847] [2022-10-15 17:56:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:12,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:12,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:12,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159867847] [2022-10-15 17:56:12,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159867847] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:12,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:12,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-15 17:56:12,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009975695] [2022-10-15 17:56:12,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:56:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:56:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:56:12,892 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 17:56:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:13,124 INFO L93 Difference]: Finished difference Result 182 states and 244 transitions. [2022-10-15 17:56:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:56:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 9 [2022-10-15 17:56:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:13,127 INFO L225 Difference]: With dead ends: 182 [2022-10-15 17:56:13,127 INFO L226 Difference]: Without dead ends: 182 [2022-10-15 17:56:13,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:56:13,129 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 252 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:13,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 443 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:56:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-10-15 17:56:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 91. [2022-10-15 17:56:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.5769230769230769) internal successors, (123), 90 states have internal predecessors, (123), 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 17:56:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2022-10-15 17:56:13,137 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 9 [2022-10-15 17:56:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:13,137 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2022-10-15 17:56:13,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 17:56:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2022-10-15 17:56:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 17:56:13,138 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:13,138 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:13,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 17:56:13,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1356498634, now seen corresponding path program 1 times [2022-10-15 17:56:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:13,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927892272] [2022-10-15 17:56:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:13,261 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 17:56:13,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927892272] [2022-10-15 17:56:13,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927892272] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649129523] [2022-10-15 17:56:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:13,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:13,269 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 17:56:13,276 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 17:56:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 17:56:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:13,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:56:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:13,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:13,733 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 17:56:13,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649129523] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:13,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:13,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-10-15 17:56:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778645520] [2022-10-15 17:56:13,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:13,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:56:13,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:56:13,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:56:13,736 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:13,988 INFO L93 Difference]: Finished difference Result 159 states and 218 transitions. [2022-10-15 17:56:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:56:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-15 17:56:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:13,991 INFO L225 Difference]: With dead ends: 159 [2022-10-15 17:56:13,991 INFO L226 Difference]: Without dead ends: 159 [2022-10-15 17:56:13,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:56:13,993 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 157 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:13,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 251 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:56:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-10-15 17:56:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 89. [2022-10-15 17:56:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.5714285714285714) internal successors, (121), 88 states have internal predecessors, (121), 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 17:56:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-10-15 17:56:14,000 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 9 [2022-10-15 17:56:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:14,000 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-10-15 17:56:14,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-10-15 17:56:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 17:56:14,001 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:14,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:14,044 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 17:56:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:14,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1469414922, now seen corresponding path program 1 times [2022-10-15 17:56:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:14,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639743046] [2022-10-15 17:56:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:14,479 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 17:56:14,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639743046] [2022-10-15 17:56:14,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639743046] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:14,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:14,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-15 17:56:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063692166] [2022-10-15 17:56:14,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:14,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:56:14,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:56:14,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:56:14,483 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 17:56:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:14,653 INFO L93 Difference]: Finished difference Result 181 states and 242 transitions. [2022-10-15 17:56:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:56:14,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 13 [2022-10-15 17:56:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:14,655 INFO L225 Difference]: With dead ends: 181 [2022-10-15 17:56:14,656 INFO L226 Difference]: Without dead ends: 181 [2022-10-15 17:56:14,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:56:14,657 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 183 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:14,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 442 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-10-15 17:56:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 91. [2022-10-15 17:56:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 90 states have internal predecessors, (123), 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 17:56:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2022-10-15 17:56:14,663 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 13 [2022-10-15 17:56:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:14,663 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2022-10-15 17:56:14,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 17:56:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2022-10-15 17:56:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 17:56:14,664 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:14,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:14,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 17:56:14,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1135853485, now seen corresponding path program 1 times [2022-10-15 17:56:14,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:14,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330429418] [2022-10-15 17:56:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:14,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:15,000 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 17:56:15,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330429418] [2022-10-15 17:56:15,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330429418] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811840160] [2022-10-15 17:56:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:15,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:15,007 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 17:56:15,021 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 17:56:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 17:56:15,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:56:15,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-15 17:56:15,264 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 17:56:15,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 17:56:15,317 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 17:56:15,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:15,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-10-15 17:56:15,623 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:15,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-15 17:56:15,646 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 17:56:15,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811840160] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:15,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:15,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-10-15 17:56:15,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587987358] [2022-10-15 17:56:15,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:15,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-15 17:56:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-15 17:56:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:56:15,649 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 17:56:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:16,998 INFO L93 Difference]: Finished difference Result 347 states and 466 transitions. [2022-10-15 17:56:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-15 17:56:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 13 [2022-10-15 17:56:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:17,001 INFO L225 Difference]: With dead ends: 347 [2022-10-15 17:56:17,002 INFO L226 Difference]: Without dead ends: 347 [2022-10-15 17:56:17,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-10-15 17:56:17,004 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 812 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:17,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1580 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 895 Invalid, 0 Unknown, 158 Unchecked, 0.8s Time] [2022-10-15 17:56:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-10-15 17:56:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 106. [2022-10-15 17:56:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 98 states have (on average 1.489795918367347) internal successors, (146), 105 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 146 transitions. [2022-10-15 17:56:17,012 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 146 transitions. Word has length 13 [2022-10-15 17:56:17,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:17,012 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 146 transitions. [2022-10-15 17:56:17,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 17:56:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 146 transitions. [2022-10-15 17:56:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 17:56:17,013 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:17,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:17,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-15 17:56:17,215 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,SelfDestructingSolverStorable9 [2022-10-15 17:56:17,216 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash -887765981, now seen corresponding path program 1 times [2022-10-15 17:56:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:17,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944556820] [2022-10-15 17:56:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:17,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:17,481 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 17:56:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:17,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944556820] [2022-10-15 17:56:17,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944556820] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:17,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:17,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-15 17:56:17,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198357060] [2022-10-15 17:56:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:56:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:56:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:56:17,486 INFO L87 Difference]: Start difference. First operand 106 states and 146 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 17:56:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:17,656 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2022-10-15 17:56:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:56:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 15 [2022-10-15 17:56:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:17,659 INFO L225 Difference]: With dead ends: 187 [2022-10-15 17:56:17,659 INFO L226 Difference]: Without dead ends: 187 [2022-10-15 17:56:17,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:56:17,660 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 286 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:17,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 287 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-10-15 17:56:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 108. [2022-10-15 17:56:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.48) internal successors, (148), 107 states have internal predecessors, (148), 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 17:56:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2022-10-15 17:56:17,666 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 15 [2022-10-15 17:56:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:17,666 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2022-10-15 17:56:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 17:56:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2022-10-15 17:56:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 17:56:17,668 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:17,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:17,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-15 17:56:17,669 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -633506548, now seen corresponding path program 2 times [2022-10-15 17:56:17,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:17,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160156077] [2022-10-15 17:56:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:18,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160156077] [2022-10-15 17:56:18,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160156077] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:18,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614689313] [2022-10-15 17:56:18,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:56:18,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:18,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:18,124 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 17:56:18,137 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 17:56:18,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:56:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:56:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 17:56:18,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:18,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:18,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:56:18,595 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 17:56:18,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:18,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:18,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:18,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-10-15 17:56:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:19,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614689313] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:19,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:19,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-10-15 17:56:19,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583203604] [2022-10-15 17:56:19,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-15 17:56:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-15 17:56:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-10-15 17:56:19,045 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:19,788 INFO L93 Difference]: Finished difference Result 331 states and 455 transitions. [2022-10-15 17:56:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 17:56:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 17:56:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:19,792 INFO L225 Difference]: With dead ends: 331 [2022-10-15 17:56:19,792 INFO L226 Difference]: Without dead ends: 331 [2022-10-15 17:56:19,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 17:56:19,795 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1065 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:19,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1143 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 378 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-10-15 17:56:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-10-15 17:56:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 118. [2022-10-15 17:56:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 117 states have internal predecessors, (160), 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 17:56:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2022-10-15 17:56:19,807 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 15 [2022-10-15 17:56:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:19,807 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-10-15 17:56:19,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2022-10-15 17:56:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 17:56:19,812 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:19,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:19,858 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 17:56:20,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:20,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1749088514, now seen corresponding path program 1 times [2022-10-15 17:56:20,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:20,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373418295] [2022-10-15 17:56:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:20,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:20,059 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 17:56:20,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:20,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373418295] [2022-10-15 17:56:20,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373418295] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:20,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:20,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:56:20,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310762198] [2022-10-15 17:56:20,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:56:20,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:56:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:56:20,062 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:20,072 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2022-10-15 17:56:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:56:20,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-15 17:56:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:20,074 INFO L225 Difference]: With dead ends: 113 [2022-10-15 17:56:20,074 INFO L226 Difference]: Without dead ends: 113 [2022-10-15 17:56:20,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 17:56:20,075 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:20,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 140 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:56:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-10-15 17:56:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-10-15 17:56:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 105 states have (on average 1.4285714285714286) internal successors, (150), 112 states have internal predecessors, (150), 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 17:56:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2022-10-15 17:56:20,080 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 16 [2022-10-15 17:56:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:20,080 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2022-10-15 17:56:20,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2022-10-15 17:56:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 17:56:20,082 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:20,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:20,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-15 17:56:20,083 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1547682981, now seen corresponding path program 1 times [2022-10-15 17:56:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:20,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106624340] [2022-10-15 17:56:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:20,323 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 17:56:20,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:20,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106624340] [2022-10-15 17:56:20,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106624340] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:20,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:20,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 17:56:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536928070] [2022-10-15 17:56:20,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:20,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:56:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:56:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:56:20,326 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:20,561 INFO L93 Difference]: Finished difference Result 190 states and 252 transitions. [2022-10-15 17:56:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-15 17:56:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-15 17:56:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:20,563 INFO L225 Difference]: With dead ends: 190 [2022-10-15 17:56:20,563 INFO L226 Difference]: Without dead ends: 190 [2022-10-15 17:56:20,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:56:20,565 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 279 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:20,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 416 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-15 17:56:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 117. [2022-10-15 17:56:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 109 states have (on average 1.4220183486238531) internal successors, (155), 116 states have internal predecessors, (155), 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 17:56:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2022-10-15 17:56:20,570 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 18 [2022-10-15 17:56:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:20,570 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2022-10-15 17:56:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2022-10-15 17:56:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 17:56:20,572 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:20,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:20,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-15 17:56:20,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash -551049815, now seen corresponding path program 1 times [2022-10-15 17:56:20,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:20,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801517334] [2022-10-15 17:56:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:20,816 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 17:56:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:20,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801517334] [2022-10-15 17:56:20,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801517334] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:20,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:20,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-15 17:56:20,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361924507] [2022-10-15 17:56:20,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:20,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:56:20,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:56:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:56:20,819 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:21,001 INFO L93 Difference]: Finished difference Result 170 states and 224 transitions. [2022-10-15 17:56:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:56:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-15 17:56:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:21,004 INFO L225 Difference]: With dead ends: 170 [2022-10-15 17:56:21,004 INFO L226 Difference]: Without dead ends: 170 [2022-10-15 17:56:21,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:56:21,006 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 170 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:21,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 375 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-10-15 17:56:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2022-10-15 17:56:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 113 states have (on average 1.415929203539823) internal successors, (160), 120 states have internal predecessors, (160), 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 17:56:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-10-15 17:56:21,013 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 19 [2022-10-15 17:56:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:21,014 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-10-15 17:56:21,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-10-15 17:56:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 17:56:21,015 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:21,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:21,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-15 17:56:21,016 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash -551260215, now seen corresponding path program 1 times [2022-10-15 17:56:21,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:21,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130236153] [2022-10-15 17:56:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:21,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:21,275 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 17:56:21,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:21,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130236153] [2022-10-15 17:56:21,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130236153] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:21,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:21,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:56:21,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378185174] [2022-10-15 17:56:21,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:21,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:56:21,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:56:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:56:21,278 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:21,336 INFO L93 Difference]: Finished difference Result 120 states and 159 transitions. [2022-10-15 17:56:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:56:21,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-15 17:56:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:21,338 INFO L225 Difference]: With dead ends: 120 [2022-10-15 17:56:21,338 INFO L226 Difference]: Without dead ends: 116 [2022-10-15 17:56:21,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:56:21,339 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 61 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:21,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:56:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-15 17:56:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-10-15 17:56:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 109 states have (on average 1.3761467889908257) internal successors, (150), 115 states have internal predecessors, (150), 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 17:56:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2022-10-15 17:56:21,344 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 19 [2022-10-15 17:56:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:21,345 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2022-10-15 17:56:21,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2022-10-15 17:56:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 17:56:21,346 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:21,346 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-15 17:56:21,347 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -498047866, now seen corresponding path program 1 times [2022-10-15 17:56:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820121747] [2022-10-15 17:56:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:21,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820121747] [2022-10-15 17:56:21,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820121747] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:21,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650469054] [2022-10-15 17:56:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:21,791 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 17:56:21,822 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 17:56:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:21,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 17:56:21,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:21,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:22,202 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:22,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:22,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:22,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:22,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650469054] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:22,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:22,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-10-15 17:56:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705115832] [2022-10-15 17:56:22,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-15 17:56:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-15 17:56:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:56:22,498 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:23,125 INFO L93 Difference]: Finished difference Result 273 states and 359 transitions. [2022-10-15 17:56:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:56:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-15 17:56:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:23,128 INFO L225 Difference]: With dead ends: 273 [2022-10-15 17:56:23,128 INFO L226 Difference]: Without dead ends: 273 [2022-10-15 17:56:23,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 17:56:23,130 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1071 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:23,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 862 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 303 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-10-15 17:56:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-10-15 17:56:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 118. [2022-10-15 17:56:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 111 states have (on average 1.3693693693693694) internal successors, (152), 117 states have internal predecessors, (152), 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 17:56:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2022-10-15 17:56:23,137 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 19 [2022-10-15 17:56:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:23,137 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2022-10-15 17:56:23,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2022-10-15 17:56:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 17:56:23,138 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:23,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:23,186 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 17:56:23,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-15 17:56:23,353 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2117969551, now seen corresponding path program 3 times [2022-10-15 17:56:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:23,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129281959] [2022-10-15 17:56:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:23,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:23,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129281959] [2022-10-15 17:56:23,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129281959] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:23,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017735043] [2022-10-15 17:56:23,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 17:56:23,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:23,762 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 17:56:23,765 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 17:56:23,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-15 17:56:23,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:56:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-15 17:56:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:23,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:56:23,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-15 17:56:23,980 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 17:56:23,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 17:56:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:24,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:24,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:56:24,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-15 17:56:24,247 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:24,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-10-15 17:56:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:24,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017735043] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:24,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:24,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-10-15 17:56:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612957364] [2022-10-15 17:56:24,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-15 17:56:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-15 17:56:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:56:24,388 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 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 17:56:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:25,656 INFO L93 Difference]: Finished difference Result 398 states and 518 transitions. [2022-10-15 17:56:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 17:56:25,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-15 17:56:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:25,660 INFO L225 Difference]: With dead ends: 398 [2022-10-15 17:56:25,660 INFO L226 Difference]: Without dead ends: 398 [2022-10-15 17:56:25,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 17:56:25,662 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1054 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:25,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 1683 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1096 Invalid, 0 Unknown, 164 Unchecked, 0.8s Time] [2022-10-15 17:56:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-10-15 17:56:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 151. [2022-10-15 17:56:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.3819444444444444) internal successors, (199), 150 states have internal predecessors, (199), 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 17:56:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2022-10-15 17:56:25,669 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 19 [2022-10-15 17:56:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:25,669 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2022-10-15 17:56:25,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 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 17:56:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2022-10-15 17:56:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 17:56:25,670 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:25,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:25,709 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 17:56:25,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-15 17:56:25,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash 429681775, now seen corresponding path program 1 times [2022-10-15 17:56:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:25,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741581575] [2022-10-15 17:56:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741581575] [2022-10-15 17:56:26,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741581575] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605152977] [2022-10-15 17:56:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:26,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:26,303 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 17:56:26,327 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 17:56:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:26,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-15 17:56:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:26,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:26,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-15 17:56:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:26,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:26,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-15 17:56:26,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-10-15 17:56:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:26,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605152977] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:26,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:26,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-10-15 17:56:26,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986062506] [2022-10-15 17:56:26,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-15 17:56:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-15 17:56:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-10-15 17:56:26,801 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:27,401 INFO L93 Difference]: Finished difference Result 307 states and 406 transitions. [2022-10-15 17:56:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 17:56:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-15 17:56:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:27,404 INFO L225 Difference]: With dead ends: 307 [2022-10-15 17:56:27,404 INFO L226 Difference]: Without dead ends: 307 [2022-10-15 17:56:27,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2022-10-15 17:56:27,406 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1017 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:27,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1040 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 354 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2022-10-15 17:56:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-10-15 17:56:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 161. [2022-10-15 17:56:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.3831168831168832) internal successors, (213), 160 states have internal predecessors, (213), 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 17:56:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 213 transitions. [2022-10-15 17:56:27,412 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 213 transitions. Word has length 20 [2022-10-15 17:56:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:27,412 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 213 transitions. [2022-10-15 17:56:27,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 213 transitions. [2022-10-15 17:56:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:56:27,413 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:27,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:27,450 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 17:56:27,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:27,630 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 617715477, now seen corresponding path program 1 times [2022-10-15 17:56:27,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:27,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454134329] [2022-10-15 17:56:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:27,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:28,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:28,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454134329] [2022-10-15 17:56:28,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454134329] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:28,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593023521] [2022-10-15 17:56:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:28,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:28,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:28,026 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 17:56:28,035 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 17:56:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 17:56:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:28,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:28,392 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:28,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:28,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:28,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:28,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:28,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593023521] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:28,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:28,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-10-15 17:56:28,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896052579] [2022-10-15 17:56:28,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:28,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-15 17:56:28,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-15 17:56:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:56:28,658 INFO L87 Difference]: Start difference. First operand 161 states and 213 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 17:56:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:29,346 INFO L93 Difference]: Finished difference Result 312 states and 410 transitions. [2022-10-15 17:56:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 17:56:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 21 [2022-10-15 17:56:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:29,349 INFO L225 Difference]: With dead ends: 312 [2022-10-15 17:56:29,349 INFO L226 Difference]: Without dead ends: 312 [2022-10-15 17:56:29,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2022-10-15 17:56:29,351 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 951 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:29,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1122 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 364 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-10-15 17:56:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-10-15 17:56:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 157. [2022-10-15 17:56:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 156 states have internal predecessors, (208), 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 17:56:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 208 transitions. [2022-10-15 17:56:29,358 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 208 transitions. Word has length 21 [2022-10-15 17:56:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:29,359 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 208 transitions. [2022-10-15 17:56:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 17:56:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 208 transitions. [2022-10-15 17:56:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:56:29,360 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:29,360 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:29,402 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 17:56:29,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:29,575 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1833895009, now seen corresponding path program 1 times [2022-10-15 17:56:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:29,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837837762] [2022-10-15 17:56:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:29,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837837762] [2022-10-15 17:56:29,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837837762] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094472111] [2022-10-15 17:56:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:29,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:29,927 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 17:56:29,936 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 17:56:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-15 17:56:30,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:30,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:30,254 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:30,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:30,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:30,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:30,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:30,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094472111] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:30,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:30,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-10-15 17:56:30,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575300518] [2022-10-15 17:56:30,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-15 17:56:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-15 17:56:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:56:30,516 INFO L87 Difference]: Start difference. First operand 157 states and 208 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 17:56:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:30,992 INFO L93 Difference]: Finished difference Result 253 states and 331 transitions. [2022-10-15 17:56:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 17:56:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 21 [2022-10-15 17:56:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:30,994 INFO L225 Difference]: With dead ends: 253 [2022-10-15 17:56:30,994 INFO L226 Difference]: Without dead ends: 253 [2022-10-15 17:56:30,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-10-15 17:56:30,996 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 668 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:30,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 1064 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 410 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-10-15 17:56:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-10-15 17:56:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 151. [2022-10-15 17:56:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.3958333333333333) internal successors, (201), 150 states have internal predecessors, (201), 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 17:56:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-10-15 17:56:31,005 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 21 [2022-10-15 17:56:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:31,005 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-10-15 17:56:31,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 17:56:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-10-15 17:56:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-15 17:56:31,006 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:31,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:31,044 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 17:56:31,220 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,SelfDestructingSolverStorable20 [2022-10-15 17:56:31,221 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash -445760440, now seen corresponding path program 4 times [2022-10-15 17:56:31,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:31,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974632395] [2022-10-15 17:56:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:31,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:31,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:31,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974632395] [2022-10-15 17:56:31,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974632395] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:31,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082551733] [2022-10-15 17:56:31,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 17:56:31,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:31,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:31,550 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 17:56:31,572 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 17:56:31,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-15 17:56:31,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:56:31,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 17:56:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:31,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:31,984 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:31,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:32,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:32,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:32,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:32,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082551733] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:32,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:32,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-15 17:56:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825153845] [2022-10-15 17:56:32,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:32,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-15 17:56:32,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-15 17:56:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-15 17:56:32,344 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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 17:56:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:33,174 INFO L93 Difference]: Finished difference Result 427 states and 568 transitions. [2022-10-15 17:56:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 17:56:33,175 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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 21 [2022-10-15 17:56:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:33,177 INFO L225 Difference]: With dead ends: 427 [2022-10-15 17:56:33,178 INFO L226 Difference]: Without dead ends: 427 [2022-10-15 17:56:33,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 17:56:33,179 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 838 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2761 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:33,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 2761 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 803 Invalid, 0 Unknown, 226 Unchecked, 0.6s Time] [2022-10-15 17:56:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-10-15 17:56:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 163. [2022-10-15 17:56:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.3846153846153846) internal successors, (216), 162 states have internal predecessors, (216), 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 17:56:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 216 transitions. [2022-10-15 17:56:33,187 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 216 transitions. Word has length 21 [2022-10-15 17:56:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:33,188 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 216 transitions. [2022-10-15 17:56:33,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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 17:56:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 216 transitions. [2022-10-15 17:56:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 17:56:33,189 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:33,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:33,223 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 17:56:33,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:33,404 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1358372599, now seen corresponding path program 1 times [2022-10-15 17:56:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613489191] [2022-10-15 17:56:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:33,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:33,480 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 17:56:33,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:33,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613489191] [2022-10-15 17:56:33,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613489191] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:33,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:33,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:56:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750288907] [2022-10-15 17:56:33,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:33,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:56:33,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:33,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:56:33,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:56:33,483 INFO L87 Difference]: Start difference. First operand 163 states and 216 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:33,506 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2022-10-15 17:56:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:56:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-15 17:56:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:33,508 INFO L225 Difference]: With dead ends: 162 [2022-10-15 17:56:33,508 INFO L226 Difference]: Without dead ends: 162 [2022-10-15 17:56:33,508 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 17:56:33,510 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:33,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 58 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:56:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-10-15 17:56:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-10-15 17:56:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.3782051282051282) internal successors, (215), 161 states have internal predecessors, (215), 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 17:56:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 215 transitions. [2022-10-15 17:56:33,523 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 215 transitions. Word has length 22 [2022-10-15 17:56:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:33,523 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 215 transitions. [2022-10-15 17:56:33,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 215 transitions. [2022-10-15 17:56:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 17:56:33,524 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:33,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:33,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-15 17:56:33,525 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1358372600, now seen corresponding path program 1 times [2022-10-15 17:56:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140749120] [2022-10-15 17:56:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:33,629 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 17:56:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140749120] [2022-10-15 17:56:33,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140749120] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:33,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:33,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:56:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327670000] [2022-10-15 17:56:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:56:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:56:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:56:33,632 INFO L87 Difference]: Start difference. First operand 162 states and 215 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:33,662 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2022-10-15 17:56:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:56:33,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-15 17:56:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:33,664 INFO L225 Difference]: With dead ends: 161 [2022-10-15 17:56:33,664 INFO L226 Difference]: Without dead ends: 158 [2022-10-15 17:56:33,664 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 17:56:33,667 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:33,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:56:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-15 17:56:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-10-15 17:56:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.3398692810457515) internal successors, (205), 157 states have internal predecessors, (205), 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 17:56:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 205 transitions. [2022-10-15 17:56:33,674 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 205 transitions. Word has length 22 [2022-10-15 17:56:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:33,674 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 205 transitions. [2022-10-15 17:56:33,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 205 transitions. [2022-10-15 17:56:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 17:56:33,675 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:33,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:33,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-10-15 17:56:33,676 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash 833175970, now seen corresponding path program 1 times [2022-10-15 17:56:33,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:33,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112780599] [2022-10-15 17:56:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:33,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:33,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:56:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754172988] [2022-10-15 17:56:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:33,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:33,698 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 17:56:33,707 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 17:56:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:33,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 17:56:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:33,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:34,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:56:34,165 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 17:56:34,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:34,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:56:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:34,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112780599] [2022-10-15 17:56:34,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:56:34,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754172988] [2022-10-15 17:56:34,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754172988] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:34,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:34,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 17:56:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721831809] [2022-10-15 17:56:34,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:56:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:56:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:56:34,183 INFO L87 Difference]: Start difference. First operand 158 states and 205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 17:56:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:34,239 INFO L93 Difference]: Finished difference Result 173 states and 221 transitions. [2022-10-15 17:56:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:56:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 25 [2022-10-15 17:56:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:34,241 INFO L225 Difference]: With dead ends: 173 [2022-10-15 17:56:34,241 INFO L226 Difference]: Without dead ends: 170 [2022-10-15 17:56:34,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:56:34,242 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:34,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 259 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-10-15 17:56:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-10-15 17:56:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-10-15 17:56:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.3251533742331287) internal successors, (216), 167 states have internal predecessors, (216), 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 17:56:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 216 transitions. [2022-10-15 17:56:34,247 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 216 transitions. Word has length 25 [2022-10-15 17:56:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:34,247 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 216 transitions. [2022-10-15 17:56:34,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 17:56:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 216 transitions. [2022-10-15 17:56:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 17:56:34,248 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:34,249 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:34,292 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 17:56:34,461 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,SelfDestructingSolverStorable24 [2022-10-15 17:56:34,461 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash -854381118, now seen corresponding path program 2 times [2022-10-15 17:56:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:34,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690672291] [2022-10-15 17:56:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:34,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690672291] [2022-10-15 17:56:34,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690672291] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:34,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134745199] [2022-10-15 17:56:34,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:56:34,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:34,812 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 17:56:34,831 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 17:56:34,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:56:34,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:56:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 17:56:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:35,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:35,270 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:35,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:35,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:35,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:35,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:35,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134745199] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:35,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:35,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-15 17:56:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85298743] [2022-10-15 17:56:35,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:35,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-15 17:56:35,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:35,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-15 17:56:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-15 17:56:35,622 INFO L87 Difference]: Start difference. First operand 168 states and 216 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 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 17:56:36,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:36,586 INFO L93 Difference]: Finished difference Result 383 states and 495 transitions. [2022-10-15 17:56:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-15 17:56:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 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 25 [2022-10-15 17:56:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:36,588 INFO L225 Difference]: With dead ends: 383 [2022-10-15 17:56:36,589 INFO L226 Difference]: Without dead ends: 383 [2022-10-15 17:56:36,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2022-10-15 17:56:36,591 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1431 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:36,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 2112 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 926 Invalid, 0 Unknown, 28 Unchecked, 0.6s Time] [2022-10-15 17:56:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-10-15 17:56:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 170. [2022-10-15 17:56:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.3212121212121213) internal successors, (218), 169 states have internal predecessors, (218), 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 17:56:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 218 transitions. [2022-10-15 17:56:36,598 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 218 transitions. Word has length 25 [2022-10-15 17:56:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:36,598 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 218 transitions. [2022-10-15 17:56:36,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 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 17:56:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 218 transitions. [2022-10-15 17:56:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-15 17:56:36,599 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:36,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:36,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-10-15 17:56:36,813 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,SelfDestructingSolverStorable25 [2022-10-15 17:56:36,813 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:36,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1399455861, now seen corresponding path program 5 times [2022-10-15 17:56:36,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:36,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315039359] [2022-10-15 17:56:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:36,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:37,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:37,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315039359] [2022-10-15 17:56:37,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315039359] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:37,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774639662] [2022-10-15 17:56:37,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-15 17:56:37,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:37,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:37,265 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 17:56:37,268 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 17:56:37,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-10-15 17:56:37,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:56:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-15 17:56:37,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:37,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:56:37,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 17:56:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:56:37,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-15 17:56:37,604 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-15 17:56:37,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-15 17:56:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:37,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774639662] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:38,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:38,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2022-10-15 17:56:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605057370] [2022-10-15 17:56:38,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:38,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-15 17:56:38,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-15 17:56:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-10-15 17:56:38,445 INFO L87 Difference]: Start difference. First operand 170 states and 218 transitions. Second operand has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:40,438 INFO L93 Difference]: Finished difference Result 509 states and 660 transitions. [2022-10-15 17:56:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-15 17:56:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-15 17:56:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:40,442 INFO L225 Difference]: With dead ends: 509 [2022-10-15 17:56:40,442 INFO L226 Difference]: Without dead ends: 509 [2022-10-15 17:56:40,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2022-10-15 17:56:40,444 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 1251 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:40,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 2189 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1216 Invalid, 0 Unknown, 63 Unchecked, 1.0s Time] [2022-10-15 17:56:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-10-15 17:56:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 203. [2022-10-15 17:56:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.3282828282828283) internal successors, (263), 202 states have internal predecessors, (263), 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 17:56:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 263 transitions. [2022-10-15 17:56:40,453 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 263 transitions. Word has length 25 [2022-10-15 17:56:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:40,453 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 263 transitions. [2022-10-15 17:56:40,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 263 transitions. [2022-10-15 17:56:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-15 17:56:40,454 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:40,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:40,488 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 17:56:40,668 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,SelfDestructingSolverStorable26 [2022-10-15 17:56:40,669 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:40,669 INFO L85 PathProgramCache]: Analyzing trace with hash -68781113, now seen corresponding path program 1 times [2022-10-15 17:56:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:40,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142793158] [2022-10-15 17:56:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:40,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:56:40,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322953389] [2022-10-15 17:56:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:40,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:40,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:40,686 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:40,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-15 17:56:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 17:56:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:40,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:56:41,116 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 17:56:41,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:41,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:56:41,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:41,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142793158] [2022-10-15 17:56:41,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:56:41,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322953389] [2022-10-15 17:56:41,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322953389] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:41,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:41,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 17:56:41,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228098853] [2022-10-15 17:56:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:56:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:56:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:56:41,133 INFO L87 Difference]: Start difference. First operand 203 states and 263 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 17:56:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:41,200 INFO L93 Difference]: Finished difference Result 208 states and 267 transitions. [2022-10-15 17:56:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:56:41,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 26 [2022-10-15 17:56:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:41,202 INFO L225 Difference]: With dead ends: 208 [2022-10-15 17:56:41,202 INFO L226 Difference]: Without dead ends: 202 [2022-10-15 17:56:41,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:56:41,203 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:41,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 295 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-10-15 17:56:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-10-15 17:56:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-10-15 17:56:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.3265306122448979) internal successors, (260), 200 states have internal predecessors, (260), 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 17:56:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 260 transitions. [2022-10-15 17:56:41,209 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 260 transitions. Word has length 26 [2022-10-15 17:56:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:41,210 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 260 transitions. [2022-10-15 17:56:41,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 17:56:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 260 transitions. [2022-10-15 17:56:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-15 17:56:41,211 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:41,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:41,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:41,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-10-15 17:56:41,425 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash 638527781, now seen corresponding path program 1 times [2022-10-15 17:56:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:41,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829950336] [2022-10-15 17:56:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:41,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:41,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:41,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829950336] [2022-10-15 17:56:41,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829950336] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:41,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340206057] [2022-10-15 17:56:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:41,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:41,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:41,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:41,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-15 17:56:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 17:56:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:41,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:42,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-15 17:56:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:42,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:42,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-15 17:56:42,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-15 17:56:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:42,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340206057] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:42,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:42,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-10-15 17:56:42,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289614863] [2022-10-15 17:56:42,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:42,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 17:56:42,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 17:56:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-10-15 17:56:42,521 INFO L87 Difference]: Start difference. First operand 201 states and 260 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 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 17:56:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:43,151 INFO L93 Difference]: Finished difference Result 269 states and 344 transitions. [2022-10-15 17:56:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-15 17:56:43,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 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 26 [2022-10-15 17:56:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:43,153 INFO L225 Difference]: With dead ends: 269 [2022-10-15 17:56:43,154 INFO L226 Difference]: Without dead ends: 269 [2022-10-15 17:56:43,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 17:56:43,155 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 472 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:43,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 956 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 294 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-10-15 17:56:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-10-15 17:56:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 213. [2022-10-15 17:56:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 212 states have internal predecessors, (276), 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 17:56:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 276 transitions. [2022-10-15 17:56:43,162 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 276 transitions. Word has length 26 [2022-10-15 17:56:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:43,163 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 276 transitions. [2022-10-15 17:56:43,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 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 17:56:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 276 transitions. [2022-10-15 17:56:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-15 17:56:43,164 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:43,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:43,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:43,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:43,378 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2026714445, now seen corresponding path program 1 times [2022-10-15 17:56:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:43,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880382657] [2022-10-15 17:56:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:43,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:43,776 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 17:56:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880382657] [2022-10-15 17:56:43,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880382657] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:43,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574884282] [2022-10-15 17:56:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:43,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:43,778 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:43,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-15 17:56:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:43,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-10-15 17:56:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:44,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:44,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-15 17:56:44,224 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 17:56:44,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:44,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-15 17:56:44,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-15 17:56:44,797 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 17:56:44,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574884282] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:44,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:44,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2022-10-15 17:56:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3066034] [2022-10-15 17:56:44,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:44,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 17:56:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 17:56:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 17:56:44,800 INFO L87 Difference]: Start difference. First operand 213 states and 276 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 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 17:56:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:46,075 INFO L93 Difference]: Finished difference Result 436 states and 564 transitions. [2022-10-15 17:56:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 17:56:46,076 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 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 26 [2022-10-15 17:56:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:46,079 INFO L225 Difference]: With dead ends: 436 [2022-10-15 17:56:46,079 INFO L226 Difference]: Without dead ends: 436 [2022-10-15 17:56:46,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-10-15 17:56:46,081 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 868 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:46,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 2649 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1137 Invalid, 0 Unknown, 109 Unchecked, 0.8s Time] [2022-10-15 17:56:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-10-15 17:56:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 223. [2022-10-15 17:56:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.3302752293577982) internal successors, (290), 222 states have internal predecessors, (290), 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 17:56:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 290 transitions. [2022-10-15 17:56:46,100 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 290 transitions. Word has length 26 [2022-10-15 17:56:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:46,100 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 290 transitions. [2022-10-15 17:56:46,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 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 17:56:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 290 transitions. [2022-10-15 17:56:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:56:46,106 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:46,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:46,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:46,320 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1066359323, now seen corresponding path program 1 times [2022-10-15 17:56:46,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:46,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119101375] [2022-10-15 17:56:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:46,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:56:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467940042] [2022-10-15 17:56:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:46,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:46,337 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:46,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-15 17:56:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:46,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 17:56:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:46,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:46,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-15 17:56:46,802 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 17:56:46,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:46,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:56:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:46,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119101375] [2022-10-15 17:56:46,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:56:46,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467940042] [2022-10-15 17:56:46,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467940042] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:46,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:46,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-15 17:56:46,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141815075] [2022-10-15 17:56:46,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:46,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:56:46,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:56:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:56:46,818 INFO L87 Difference]: Start difference. First operand 223 states and 290 transitions. Second operand has 8 states, 8 states have (on average 3.375) 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 17:56:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:46,877 INFO L93 Difference]: Finished difference Result 231 states and 298 transitions. [2022-10-15 17:56:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:56:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) 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 27 [2022-10-15 17:56:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:46,879 INFO L225 Difference]: With dead ends: 231 [2022-10-15 17:56:46,879 INFO L226 Difference]: Without dead ends: 228 [2022-10-15 17:56:46,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:56:46,881 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:46,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 286 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-10-15 17:56:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-10-15 17:56:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-10-15 17:56:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.3243243243243243) internal successors, (294), 226 states have internal predecessors, (294), 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 17:56:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 294 transitions. [2022-10-15 17:56:46,888 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 294 transitions. Word has length 27 [2022-10-15 17:56:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:46,888 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 294 transitions. [2022-10-15 17:56:46,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) 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 17:56:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 294 transitions. [2022-10-15 17:56:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:56:46,890 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:46,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:46,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:47,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:47,105 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash -478449138, now seen corresponding path program 1 times [2022-10-15 17:56:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:47,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471628010] [2022-10-15 17:56:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:47,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:56:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915037021] [2022-10-15 17:56:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:47,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:47,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:47,122 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:47,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-15 17:56:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-15 17:56:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:47,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:47,423 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:47,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:47,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:47,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:47,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-15 17:56:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:47,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:47,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471628010] [2022-10-15 17:56:47,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:56:47,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915037021] [2022-10-15 17:56:47,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915037021] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:47,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:56:47,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-10-15 17:56:47,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096839349] [2022-10-15 17:56:47,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:47,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 17:56:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 17:56:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-10-15 17:56:47,617 INFO L87 Difference]: Start difference. First operand 227 states and 294 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 17:56:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:47,880 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2022-10-15 17:56:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-15 17:56:47,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 27 [2022-10-15 17:56:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:47,882 INFO L225 Difference]: With dead ends: 268 [2022-10-15 17:56:47,882 INFO L226 Difference]: Without dead ends: 257 [2022-10-15 17:56:47,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-10-15 17:56:47,883 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 93 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:47,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 584 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-10-15 17:56:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-10-15 17:56:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 227. [2022-10-15 17:56:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.3198198198198199) internal successors, (293), 226 states have internal predecessors, (293), 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 17:56:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 293 transitions. [2022-10-15 17:56:47,897 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 293 transitions. Word has length 27 [2022-10-15 17:56:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:47,897 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 293 transitions. [2022-10-15 17:56:47,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 17:56:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 293 transitions. [2022-10-15 17:56:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:56:47,898 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:47,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:47,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:48,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:48,113 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:48,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1778843985, now seen corresponding path program 1 times [2022-10-15 17:56:48,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:48,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437682263] [2022-10-15 17:56:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:48,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:48,473 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 17:56:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:48,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437682263] [2022-10-15 17:56:48,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437682263] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920112077] [2022-10-15 17:56:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:48,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:48,477 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:48,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-15 17:56:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 17:56:48,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:48,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:48,926 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:48,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:48,949 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 17:56:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:49,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:49,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:49,242 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 17:56:49,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920112077] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:49,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:49,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-15 17:56:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730070896] [2022-10-15 17:56:49,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:49,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-15 17:56:49,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:49,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-15 17:56:49,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-15 17:56:49,245 INFO L87 Difference]: Start difference. First operand 227 states and 293 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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 17:56:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:49,978 INFO L93 Difference]: Finished difference Result 379 states and 487 transitions. [2022-10-15 17:56:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-15 17:56:49,978 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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 27 [2022-10-15 17:56:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:49,981 INFO L225 Difference]: With dead ends: 379 [2022-10-15 17:56:49,981 INFO L226 Difference]: Without dead ends: 379 [2022-10-15 17:56:49,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-10-15 17:56:49,983 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 587 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:49,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1667 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 647 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-10-15 17:56:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-10-15 17:56:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 223. [2022-10-15 17:56:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.3211009174311927) internal successors, (288), 222 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:56:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 288 transitions. [2022-10-15 17:56:49,991 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 288 transitions. Word has length 27 [2022-10-15 17:56:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:49,991 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 288 transitions. [2022-10-15 17:56:49,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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 17:56:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 288 transitions. [2022-10-15 17:56:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:56:49,992 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:49,992 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:50,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:50,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:50,206 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash -672766501, now seen corresponding path program 2 times [2022-10-15 17:56:50,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:50,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250513348] [2022-10-15 17:56:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250513348] [2022-10-15 17:56:50,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250513348] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:50,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301882001] [2022-10-15 17:56:50,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:56:50,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:50,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:50,556 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:50,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-15 17:56:50,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:56:50,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:56:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-15 17:56:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:50,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:51,023 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:51,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:51,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:51,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:51,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:51,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301882001] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:51,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:51,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-10-15 17:56:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967239734] [2022-10-15 17:56:51,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-15 17:56:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-15 17:56:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-10-15 17:56:51,372 INFO L87 Difference]: Start difference. First operand 223 states and 288 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 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 17:56:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:52,409 INFO L93 Difference]: Finished difference Result 387 states and 498 transitions. [2022-10-15 17:56:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 17:56:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 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 27 [2022-10-15 17:56:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:52,413 INFO L225 Difference]: With dead ends: 387 [2022-10-15 17:56:52,413 INFO L226 Difference]: Without dead ends: 387 [2022-10-15 17:56:52,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2022-10-15 17:56:52,415 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 673 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:52,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 2428 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 979 Invalid, 0 Unknown, 21 Unchecked, 0.7s Time] [2022-10-15 17:56:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-10-15 17:56:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 217. [2022-10-15 17:56:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.3254716981132075) internal successors, (281), 216 states have internal predecessors, (281), 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 17:56:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 281 transitions. [2022-10-15 17:56:52,424 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 281 transitions. Word has length 27 [2022-10-15 17:56:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:52,425 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 281 transitions. [2022-10-15 17:56:52,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 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 17:56:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 281 transitions. [2022-10-15 17:56:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:56:52,426 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:52,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:52,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:52,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:52,640 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:52,641 INFO L85 PathProgramCache]: Analyzing trace with hash -552319420, now seen corresponding path program 6 times [2022-10-15 17:56:52,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:52,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712211422] [2022-10-15 17:56:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:52,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:53,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:53,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712211422] [2022-10-15 17:56:53,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712211422] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:53,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866234986] [2022-10-15 17:56:53,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-15 17:56:53,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:53,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:53,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-10-15 17:56:53,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-10-15 17:56:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:56:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-10-15 17:56:53,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:53,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:53,637 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-15 17:56:53,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-10-15 17:56:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:53,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:53,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-15 17:56:53,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-15 17:56:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:54,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866234986] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:54,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:54,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-10-15 17:56:54,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046687212] [2022-10-15 17:56:54,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:54,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-15 17:56:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:54,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-15 17:56:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 17:56:54,102 INFO L87 Difference]: Start difference. First operand 217 states and 281 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 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 17:56:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:55,921 INFO L93 Difference]: Finished difference Result 584 states and 759 transitions. [2022-10-15 17:56:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-15 17:56:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 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 27 [2022-10-15 17:56:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:55,925 INFO L225 Difference]: With dead ends: 584 [2022-10-15 17:56:55,926 INFO L226 Difference]: Without dead ends: 584 [2022-10-15 17:56:55,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2022-10-15 17:56:55,927 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 1813 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 4500 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:55,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1813 Valid, 4500 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1847 Invalid, 0 Unknown, 375 Unchecked, 1.3s Time] [2022-10-15 17:56:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-10-15 17:56:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 231. [2022-10-15 17:56:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.323008849557522) internal successors, (299), 230 states have internal predecessors, (299), 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 17:56:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 299 transitions. [2022-10-15 17:56:55,936 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 299 transitions. Word has length 27 [2022-10-15 17:56:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:55,936 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 299 transitions. [2022-10-15 17:56:55,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 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 17:56:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 299 transitions. [2022-10-15 17:56:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 17:56:55,937 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:55,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:55,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:56,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-10-15 17:56:56,152 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1175166948, now seen corresponding path program 1 times [2022-10-15 17:56:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:56,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115658943] [2022-10-15 17:56:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:56,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:56:56,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812633313] [2022-10-15 17:56:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:56,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:56,167 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:56,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-10-15 17:56:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 17:56:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 17:56:56,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:56:56,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:56,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115658943] [2022-10-15 17:56:56,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:56:56,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812633313] [2022-10-15 17:56:56,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812633313] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:56:56,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:56:56,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:56:56,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716302756] [2022-10-15 17:56:56,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:56:56,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:56:56,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:56,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:56:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:56:56,294 INFO L87 Difference]: Start difference. First operand 231 states and 299 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 17:56:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:56:56,340 INFO L93 Difference]: Finished difference Result 311 states and 396 transitions. [2022-10-15 17:56:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:56:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 17:56:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:56:56,343 INFO L225 Difference]: With dead ends: 311 [2022-10-15 17:56:56,343 INFO L226 Difference]: Without dead ends: 297 [2022-10-15 17:56:56,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:56:56,346 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:56:56,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 173 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:56:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-10-15 17:56:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 222. [2022-10-15 17:56:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.3317972350230414) internal successors, (289), 221 states have internal predecessors, (289), 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 17:56:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 289 transitions. [2022-10-15 17:56:56,364 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 289 transitions. Word has length 28 [2022-10-15 17:56:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:56:56,371 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 289 transitions. [2022-10-15 17:56:56,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 17:56:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 289 transitions. [2022-10-15 17:56:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 17:56:56,372 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:56:56,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:56:56,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-10-15 17:56:56,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-10-15 17:56:56,573 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-10-15 17:56:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:56:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -553499126, now seen corresponding path program 1 times [2022-10-15 17:56:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:56:56,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282770394] [2022-10-15 17:56:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:56:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:56,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:56:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282770394] [2022-10-15 17:56:56,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282770394] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:56:56,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820797090] [2022-10-15 17:56:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:56:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:56:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:56:56,877 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 17:56:56,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-10-15 17:56:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:56:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-15 17:56:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:56:57,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-15 17:56:57,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-15 17:56:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:57,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:56:57,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-10-15 17:56:57,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-15 17:56:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:56:57,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820797090] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:56:57,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:56:57,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-10-15 17:56:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834859457] [2022-10-15 17:56:57,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:56:57,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-15 17:56:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:56:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-15 17:56:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-10-15 17:56:57,585 INFO L87 Difference]: Start difference. First operand 222 states and 289 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 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)