/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-memory-alloca/openbsd_cstrncat-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 04:40:44,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 04:40:44,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 04:40:44,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 04:40:44,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 04:40:44,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 04:40:44,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 04:40:44,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 04:40:44,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 04:40:44,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 04:40:44,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 04:40:44,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 04:40:44,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 04:40:44,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 04:40:44,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 04:40:44,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 04:40:44,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 04:40:44,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 04:40:44,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 04:40:44,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 04:40:44,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 04:40:44,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 04:40:44,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 04:40:44,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 04:40:44,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 04:40:44,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 04:40:44,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 04:40:44,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 04:40:44,565 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 [2022-10-16 04:40:44,591 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 04:40:44,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 04:40:44,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 04:40:44,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 04:40:44,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 04:40:44,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 04:40:44,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 04:40:44,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 04:40:44,594 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 04:40:44,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 04:40:44,594 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 04:40:44,595 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 04:40:44,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 04:40:44,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 04:40:44,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 04:40:44,595 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 04:40:44,596 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 04:40:44,596 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 04:40:44,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 04:40:44,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 04:40:44,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 04:40:44,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 04:40:44,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 04:40:44,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 04:40:44,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 04:40:44,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:40:44,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 04:40:44,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 04:40:44,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 04:40:44,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 04:40:44,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 04:40:44,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 04:40:44,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 04:40:44,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 04:40:44,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 04:40:44,976 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 04:40:44,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncat-alloca-1.i [2022-10-16 04:40:45,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9117a77fa/98c40656aad44784a9ff79b616a1281c/FLAG5962aa357 [2022-10-16 04:40:45,746 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 04:40:45,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrncat-alloca-1.i [2022-10-16 04:40:45,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9117a77fa/98c40656aad44784a9ff79b616a1281c/FLAG5962aa357 [2022-10-16 04:40:46,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9117a77fa/98c40656aad44784a9ff79b616a1281c [2022-10-16 04:40:46,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 04:40:46,059 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 04:40:46,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 04:40:46,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 04:40:46,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 04:40:46,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed85e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46, skipping insertion in model container [2022-10-16 04:40:46,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 04:40:46,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 04:40:46,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:40:46,407 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 04:40:46,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:40:46,505 INFO L208 MainTranslator]: Completed translation [2022-10-16 04:40:46,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46 WrapperNode [2022-10-16 04:40:46,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 04:40:46,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 04:40:46,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 04:40:46,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 04:40:46,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,593 INFO L138 Inliner]: procedures = 111, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-10-16 04:40:46,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 04:40:46,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 04:40:46,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 04:40:46,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 04:40:46,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,624 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 04:40:46,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 04:40:46,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 04:40:46,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 04:40:46,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (1/1) ... [2022-10-16 04:40:46,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:40:46,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:46,677 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) [2022-10-16 04:40:46,685 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 [2022-10-16 04:40:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 04:40:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 04:40:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 04:40:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 04:40:46,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 04:40:46,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 04:40:46,991 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 04:40:47,000 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 04:40:47,350 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 04:40:47,357 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 04:40:47,357 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-16 04:40:47,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:40:47 BoogieIcfgContainer [2022-10-16 04:40:47,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 04:40:47,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 04:40:47,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 04:40:47,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 04:40:47,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 04:40:46" (1/3) ... [2022-10-16 04:40:47,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423643ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:40:47, skipping insertion in model container [2022-10-16 04:40:47,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:46" (2/3) ... [2022-10-16 04:40:47,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423643ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:40:47, skipping insertion in model container [2022-10-16 04:40:47,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:40:47" (3/3) ... [2022-10-16 04:40:47,370 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-1.i [2022-10-16 04:40:47,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 04:40:47,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-10-16 04:40:47,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 04:40:47,453 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;@1ef28925, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 04:40:47,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-10-16 04:40:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 2.0) internal successors, (46), 36 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) [2022-10-16 04:40:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:40:47,466 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:47,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:47,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031078, now seen corresponding path program 1 times [2022-10-16 04:40:47,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796777605] [2022-10-16 04:40:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:47,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:47,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:47,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796777605] [2022-10-16 04:40:47,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796777605] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:47,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:47,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:40:47,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658040441] [2022-10-16 04:40:47,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:47,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:40:47,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:40:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:40:47,731 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 2.0) internal successors, (46), 36 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) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-10-16 04:40:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:47,808 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-10-16 04:40:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:40:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2022-10-16 04:40:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:47,821 INFO L225 Difference]: With dead ends: 38 [2022-10-16 04:40:47,821 INFO L226 Difference]: Without dead ends: 35 [2022-10-16 04:40:47,823 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 [2022-10-16 04:40:47,828 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:47,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 60 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-16 04:40:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-16 04:40:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-10-16 04:40:47,869 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 7 [2022-10-16 04:40:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:47,869 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-10-16 04:40:47,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-10-16 04:40:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-10-16 04:40:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:40:47,870 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:47,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:47,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 04:40:47,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031082, now seen corresponding path program 1 times [2022-10-16 04:40:47,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:47,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008171317] [2022-10-16 04:40:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:47,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:48,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:48,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008171317] [2022-10-16 04:40:48,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008171317] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:48,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:48,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 04:40:48,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484149881] [2022-10-16 04:40:48,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:40:48,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:48,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:40:48,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:40:48,039 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.4) 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) [2022-10-16 04:40:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:48,130 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-10-16 04:40:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:40:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) 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 [2022-10-16 04:40:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:48,134 INFO L225 Difference]: With dead ends: 38 [2022-10-16 04:40:48,134 INFO L226 Difference]: Without dead ends: 35 [2022-10-16 04:40:48,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:40:48,138 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:48,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-16 04:40:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-16 04:40:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-10-16 04:40:48,154 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 7 [2022-10-16 04:40:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:48,154 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-10-16 04:40:48,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) 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) [2022-10-16 04:40:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-10-16 04:40:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:40:48,156 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:48,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 04:40:48,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:48,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1806878124, now seen corresponding path program 1 times [2022-10-16 04:40:48,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:48,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947710914] [2022-10-16 04:40:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:48,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:48,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947710914] [2022-10-16 04:40:48,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947710914] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:48,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:48,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:40:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522041579] [2022-10-16 04:40:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:48,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:40:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:40:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:40:48,504 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-10-16 04:40:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:48,536 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-10-16 04:40:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:40:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2022-10-16 04:40:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:48,537 INFO L225 Difference]: With dead ends: 34 [2022-10-16 04:40:48,537 INFO L226 Difference]: Without dead ends: 34 [2022-10-16 04:40:48,538 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 [2022-10-16 04:40:48,540 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 30 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 [2022-10-16 04:40:48,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 30 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-10-16 04:40:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-10-16 04:40:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 33 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) [2022-10-16 04:40:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-10-16 04:40:48,547 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2022-10-16 04:40:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:48,547 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-10-16 04:40:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-10-16 04:40:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-10-16 04:40:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:40:48,548 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:48,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:48,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 04:40:48,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1806878125, now seen corresponding path program 1 times [2022-10-16 04:40:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:48,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645724916] [2022-10-16 04:40:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:48,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645724916] [2022-10-16 04:40:48,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645724916] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:48,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:48,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:40:48,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487092447] [2022-10-16 04:40:48,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:48,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:40:48,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:40:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:40:48,806 INFO L87 Difference]: Start difference. First operand 34 states and 39 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) [2022-10-16 04:40:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:48,897 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-10-16 04:40:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:40:48,898 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 [2022-10-16 04:40:48,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:48,900 INFO L225 Difference]: With dead ends: 33 [2022-10-16 04:40:48,900 INFO L226 Difference]: Without dead ends: 33 [2022-10-16 04:40:48,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:40:48,910 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:48,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-16 04:40:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-16 04:40:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-10-16 04:40:48,919 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 7 [2022-10-16 04:40:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:48,920 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-10-16 04:40:48,920 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) [2022-10-16 04:40:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-10-16 04:40:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 04:40:48,921 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:48,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:48,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 04:40:48,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash 178646995, now seen corresponding path program 1 times [2022-10-16 04:40:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:48,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620252379] [2022-10-16 04:40:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:48,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:48,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620252379] [2022-10-16 04:40:48,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620252379] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:48,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:48,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:40:48,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886853291] [2022-10-16 04:40:48,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:40:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:40:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:40:48,978 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:49,004 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-10-16 04:40:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:40:49,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 04:40:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:49,006 INFO L225 Difference]: With dead ends: 32 [2022-10-16 04:40:49,006 INFO L226 Difference]: Without dead ends: 32 [2022-10-16 04:40:49,007 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 [2022-10-16 04:40:49,008 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:49,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-16 04:40:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-10-16 04:40:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-10-16 04:40:49,014 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2022-10-16 04:40:49,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:49,014 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-10-16 04:40:49,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-10-16 04:40:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 04:40:49,015 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:49,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:49,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 04:40:49,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash 178646996, now seen corresponding path program 1 times [2022-10-16 04:40:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504822589] [2022-10-16 04:40:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:49,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:49,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:49,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504822589] [2022-10-16 04:40:49,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504822589] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:49,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:49,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:40:49,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094710881] [2022-10-16 04:40:49,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:49,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:40:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:40:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:49,179 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:49,212 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-10-16 04:40:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:40:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 04:40:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:49,215 INFO L225 Difference]: With dead ends: 31 [2022-10-16 04:40:49,215 INFO L226 Difference]: Without dead ends: 31 [2022-10-16 04:40:49,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:49,217 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:49,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 28 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-16 04:40:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-10-16 04:40:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-10-16 04:40:49,234 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2022-10-16 04:40:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:49,235 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-10-16 04:40:49,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-10-16 04:40:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-16 04:40:49,236 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:49,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:49,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 04:40:49,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash 608150388, now seen corresponding path program 1 times [2022-10-16 04:40:49,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616516693] [2022-10-16 04:40:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:49,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:49,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616516693] [2022-10-16 04:40:49,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616516693] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:49,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:49,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:40:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996610409] [2022-10-16 04:40:49,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:49,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:40:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:40:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:40:49,356 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:49,433 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-10-16 04:40:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:40:49,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-16 04:40:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:49,435 INFO L225 Difference]: With dead ends: 30 [2022-10-16 04:40:49,435 INFO L226 Difference]: Without dead ends: 30 [2022-10-16 04:40:49,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:40:49,437 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:49,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 33 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-16 04:40:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-10-16 04:40:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-10-16 04:40:49,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 11 [2022-10-16 04:40:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:49,442 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-10-16 04:40:49,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-10-16 04:40:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-16 04:40:49,443 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:49,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:49,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 04:40:49,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:49,444 INFO L85 PathProgramCache]: Analyzing trace with hash 608150389, now seen corresponding path program 1 times [2022-10-16 04:40:49,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:49,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139584608] [2022-10-16 04:40:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:49,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:49,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139584608] [2022-10-16 04:40:49,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139584608] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:49,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:49,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 04:40:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296102697] [2022-10-16 04:40:49,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:49,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:40:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:40:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:40:49,633 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:49,760 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-10-16 04:40:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:40:49,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-16 04:40:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:49,761 INFO L225 Difference]: With dead ends: 41 [2022-10-16 04:40:49,761 INFO L226 Difference]: Without dead ends: 41 [2022-10-16 04:40:49,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-10-16 04:40:49,763 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:49,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 54 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-16 04:40:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-10-16 04:40:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 34 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) [2022-10-16 04:40:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-10-16 04:40:49,768 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 11 [2022-10-16 04:40:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:49,769 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-10-16 04:40:49,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-10-16 04:40:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 04:40:49,770 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:49,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:49,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-16 04:40:49,770 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 316971150, now seen corresponding path program 1 times [2022-10-16 04:40:49,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:49,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950623752] [2022-10-16 04:40:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:49,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:50,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950623752] [2022-10-16 04:40:50,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950623752] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:40:50,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732234009] [2022-10-16 04:40:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:50,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:50,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:50,068 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) [2022-10-16 04:40:50,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 04:40:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-10-16 04:40:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:40:50,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:40:50,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:40:50,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:40:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:50,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:40:50,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:40:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:50,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732234009] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:40:50,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:40:50,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-10-16 04:40:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241683499] [2022-10-16 04:40:50,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:40:50,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-16 04:40:50,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-16 04:40:50,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-10-16 04:40:50,777 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:51,050 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-10-16 04:40:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 04:40:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-10-16 04:40:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:51,051 INFO L225 Difference]: With dead ends: 66 [2022-10-16 04:40:51,051 INFO L226 Difference]: Without dead ends: 66 [2022-10-16 04:40:51,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:40:51,053 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 315 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:51,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 148 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-16 04:40:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2022-10-16 04:40:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 40 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) [2022-10-16 04:40:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-10-16 04:40:51,058 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 13 [2022-10-16 04:40:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:51,058 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-10-16 04:40:51,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-10-16 04:40:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 04:40:51,059 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:51,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:51,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 04:40:51,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:51,274 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash 318322514, now seen corresponding path program 1 times [2022-10-16 04:40:51,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:51,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336895756] [2022-10-16 04:40:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:51,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336895756] [2022-10-16 04:40:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336895756] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:51,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:51,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:40:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423048710] [2022-10-16 04:40:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:51,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:40:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:40:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:51,363 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:51,394 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2022-10-16 04:40:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:40:51,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-16 04:40:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:51,395 INFO L225 Difference]: With dead ends: 89 [2022-10-16 04:40:51,395 INFO L226 Difference]: Without dead ends: 89 [2022-10-16 04:40:51,396 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 [2022-10-16 04:40:51,397 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:51,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 96 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-16 04:40:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 46. [2022-10-16 04:40:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.45) internal successors, (58), 45 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) [2022-10-16 04:40:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-10-16 04:40:51,402 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 13 [2022-10-16 04:40:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:51,402 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-10-16 04:40:51,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-10-16 04:40:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 04:40:51,403 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:51,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:51,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 04:40:51,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:51,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:51,404 INFO L85 PathProgramCache]: Analyzing trace with hash 998380884, now seen corresponding path program 1 times [2022-10-16 04:40:51,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:51,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015070365] [2022-10-16 04:40:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:51,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:51,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015070365] [2022-10-16 04:40:51,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015070365] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:51,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:51,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 04:40:51,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808947596] [2022-10-16 04:40:51,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:51,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:40:51,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:51,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:40:51,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:40:51,489 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-10-16 04:40:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:51,514 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-10-16 04:40:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:40:51,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-10-16 04:40:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:51,516 INFO L225 Difference]: With dead ends: 58 [2022-10-16 04:40:51,516 INFO L226 Difference]: Without dead ends: 58 [2022-10-16 04:40:51,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:40:51,517 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:51,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-16 04:40:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2022-10-16 04:40:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 40 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) [2022-10-16 04:40:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-10-16 04:40:51,521 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 13 [2022-10-16 04:40:51,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:51,522 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-10-16 04:40:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-10-16 04:40:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-10-16 04:40:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-16 04:40:51,523 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:51,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 04:40:51,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:51,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1236169532, now seen corresponding path program 1 times [2022-10-16 04:40:51,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:51,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379663738] [2022-10-16 04:40:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:51,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:51,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379663738] [2022-10-16 04:40:51,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379663738] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:51,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:51,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 04:40:51,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696993286] [2022-10-16 04:40:51,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:51,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 04:40:51,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:51,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 04:40:51,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:40:51,602 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:51,662 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-10-16 04:40:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:40:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-16 04:40:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:51,663 INFO L225 Difference]: With dead ends: 40 [2022-10-16 04:40:51,663 INFO L226 Difference]: Without dead ends: 40 [2022-10-16 04:40:51,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:40:51,665 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:51,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 48 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-16 04:40:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-10-16 04:40:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-10-16 04:40:51,669 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2022-10-16 04:40:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:51,669 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-10-16 04:40:51,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-10-16 04:40:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-16 04:40:51,670 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:51,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:51,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 04:40:51,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1236169533, now seen corresponding path program 1 times [2022-10-16 04:40:51,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:51,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903741366] [2022-10-16 04:40:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903741366] [2022-10-16 04:40:51,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903741366] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:51,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:51,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 04:40:51,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468395593] [2022-10-16 04:40:51,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:51,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:40:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:40:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:40:51,923 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:52,022 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-10-16 04:40:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:40:52,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-16 04:40:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:52,024 INFO L225 Difference]: With dead ends: 44 [2022-10-16 04:40:52,024 INFO L226 Difference]: Without dead ends: 44 [2022-10-16 04:40:52,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-16 04:40:52,026 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:52,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 66 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-16 04:40:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-10-16 04:40:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-10-16 04:40:52,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 14 [2022-10-16 04:40:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:52,030 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-10-16 04:40:52,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-10-16 04:40:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 04:40:52,031 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:52,031 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:52,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-16 04:40:52,032 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:52,033 INFO L85 PathProgramCache]: Analyzing trace with hash -333403289, now seen corresponding path program 2 times [2022-10-16 04:40:52,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:52,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122639813] [2022-10-16 04:40:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:52,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:52,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:52,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122639813] [2022-10-16 04:40:52,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122639813] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:40:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84824997] [2022-10-16 04:40:52,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:40:52,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:52,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:52,602 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) [2022-10-16 04:40:52,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 04:40:52,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:40:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:40:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-16 04:40:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:40:52,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:40:52,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:40:52,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-10-16 04:40:52,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 22 [2022-10-16 04:40:53,141 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:53,142 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 21 treesize of output 20 [2022-10-16 04:40:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:53,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:40:53,660 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_~d~0#1.offset_21| Int) (v_ArrVal_132 (Array Int Int))) (or (<= (+ 3 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_21|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_132) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrncat_~d~0#1.offset_21|) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~d~0#1.offset_21|) (not (<= 0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_21|)))) is different from false [2022-10-16 04:40:53,682 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:53,682 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-10-16 04:40:53,693 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:53,694 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 36 treesize of output 35 [2022-10-16 04:40:53,703 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 9 treesize of output 7 [2022-10-16 04:40:53,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:40:53,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:40:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:54,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84824997] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:40:54,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:40:54,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-10-16 04:40:54,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875939634] [2022-10-16 04:40:54,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:40:54,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-10-16 04:40:54,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:54,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-10-16 04:40:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=678, Unknown=1, NotChecked=52, Total=812 [2022-10-16 04:40:54,072 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:54,870 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-10-16 04:40:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-16 04:40:54,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-16 04:40:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:54,871 INFO L225 Difference]: With dead ends: 76 [2022-10-16 04:40:54,871 INFO L226 Difference]: Without dead ends: 76 [2022-10-16 04:40:54,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=1248, Unknown=1, NotChecked=72, Total=1482 [2022-10-16 04:40:54,875 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:54,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 540 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-10-16 04:40:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-10-16 04:40:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 44. [2022-10-16 04:40:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 43 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) [2022-10-16 04:40:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-10-16 04:40:54,882 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 15 [2022-10-16 04:40:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:54,882 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-10-16 04:40:54,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-10-16 04:40:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 04:40:54,887 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:54,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:54,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 04:40:55,091 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,SelfDestructingSolverStorable13 [2022-10-16 04:40:55,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1721986048, now seen corresponding path program 3 times [2022-10-16 04:40:55,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808629064] [2022-10-16 04:40:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:55,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808629064] [2022-10-16 04:40:55,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808629064] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:40:55,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093756112] [2022-10-16 04:40:55,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:40:55,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:55,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:55,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:40:55,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 04:40:55,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:40:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:40:55,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 44 conjunts are in the unsatisfiable core [2022-10-16 04:40:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:40:55,955 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:40:55,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:40:55,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:40:56,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-10-16 04:40:56,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 23 [2022-10-16 04:40:56,255 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:56,255 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 22 treesize of output 20 [2022-10-16 04:40:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:40:56,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:40:56,889 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:56,889 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-10-16 04:40:56,900 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:56,901 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 36 treesize of output 35 [2022-10-16 04:40:56,910 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 9 treesize of output 7 [2022-10-16 04:40:57,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:40:57,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:40:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:40:57,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093756112] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:40:57,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:40:57,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-10-16 04:40:57,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372717098] [2022-10-16 04:40:57,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:40:57,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-16 04:40:57,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-16 04:40:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=775, Unknown=7, NotChecked=0, Total=870 [2022-10-16 04:40:57,052 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:57,617 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-10-16 04:40:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 04:40:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 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 17 [2022-10-16 04:40:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:57,619 INFO L225 Difference]: With dead ends: 57 [2022-10-16 04:40:57,619 INFO L226 Difference]: Without dead ends: 57 [2022-10-16 04:40:57,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=1365, Unknown=7, NotChecked=0, Total=1560 [2022-10-16 04:40:57,620 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:57,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 320 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-10-16 04:40:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-16 04:40:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-10-16 04:40:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.34) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-10-16 04:40:57,624 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2022-10-16 04:40:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:57,625 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-10-16 04:40:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-10-16 04:40:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 04:40:57,626 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:57,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:57,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 04:40:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:57,838 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:40:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1135180034, now seen corresponding path program 1 times [2022-10-16 04:40:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:57,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674390094] [2022-10-16 04:40:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:58,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:58,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674390094] [2022-10-16 04:40:58,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674390094] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:40:58,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945686970] [2022-10-16 04:40:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:58,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:58,470 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) [2022-10-16 04:40:58,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 04:40:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 58 conjunts are in the unsatisfiable core [2022-10-16 04:40:58,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:40:58,605 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:40:58,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:40:58,658 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 17 treesize of output 13 [2022-10-16 04:40:58,868 INFO L356 Elim1Store]: treesize reduction 52, result has 54.8 percent of original size [2022-10-16 04:40:58,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 107 [2022-10-16 04:40:59,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:40:59,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:40:59,774 INFO L356 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2022-10-16 04:40:59,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 53 [2022-10-16 04:40:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:59,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:00,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 83 [2022-10-16 04:41:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:00,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945686970] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:00,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:00,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2022-10-16 04:41:00,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635983441] [2022-10-16 04:41:00,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:00,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-10-16 04:41:00,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-10-16 04:41:00,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-10-16 04:41:00,647 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:01,934 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2022-10-16 04:41:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-10-16 04:41:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 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 17 [2022-10-16 04:41:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:01,936 INFO L225 Difference]: With dead ends: 162 [2022-10-16 04:41:01,936 INFO L226 Difference]: Without dead ends: 162 [2022-10-16 04:41:01,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=272, Invalid=2380, Unknown=0, NotChecked=0, Total=2652 [2022-10-16 04:41:01,938 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:01,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 749 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 595 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-10-16 04:41:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-10-16 04:41:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 74. [2022-10-16 04:41:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.318840579710145) internal successors, (91), 73 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) [2022-10-16 04:41:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-10-16 04:41:01,950 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 17 [2022-10-16 04:41:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:01,951 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-10-16 04:41:01,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-10-16 04:41:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-16 04:41:01,953 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:01,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:01,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:02,153 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,SelfDestructingSolverStorable15 [2022-10-16 04:41:02,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1034749287, now seen corresponding path program 1 times [2022-10-16 04:41:02,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:02,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760315488] [2022-10-16 04:41:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:03,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760315488] [2022-10-16 04:41:03,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760315488] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441467819] [2022-10-16 04:41:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:03,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:03,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:03,050 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) [2022-10-16 04:41:03,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 04:41:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 58 conjunts are in the unsatisfiable core [2022-10-16 04:41:03,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:03,190 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:03,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:03,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:03,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-10-16 04:41:03,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 22 [2022-10-16 04:41:03,899 INFO L356 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2022-10-16 04:41:03,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 45 [2022-10-16 04:41:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:04,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:04,850 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_~d~0#1.offset_46| Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_205) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 2 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_46|)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~d~0#1.offset_46|) (= (select .cse0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_46|) 0) (<= (+ 5 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_46|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_46|)) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~d~0#1.offset_46| 1)) 0)))) is different from false [2022-10-16 04:41:04,874 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:04,874 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2022-10-16 04:41:04,894 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:04,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 99 [2022-10-16 04:41:04,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-10-16 04:41:05,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:41:05,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:05,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441467819] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:05,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:05,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2022-10-16 04:41:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997764372] [2022-10-16 04:41:05,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:05,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-16 04:41:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-16 04:41:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1415, Unknown=1, NotChecked=76, Total=1640 [2022-10-16 04:41:05,245 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 41 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:07,090 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2022-10-16 04:41:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-16 04:41:07,091 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-16 04:41:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:07,092 INFO L225 Difference]: With dead ends: 183 [2022-10-16 04:41:07,092 INFO L226 Difference]: Without dead ends: 183 [2022-10-16 04:41:07,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=359, Invalid=3184, Unknown=1, NotChecked=116, Total=3660 [2022-10-16 04:41:07,098 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 120 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:07,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 819 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 543 Invalid, 0 Unknown, 111 Unchecked, 0.4s Time] [2022-10-16 04:41:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-10-16 04:41:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 71. [2022-10-16 04:41:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.378787878787879) internal successors, (91), 70 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) [2022-10-16 04:41:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-10-16 04:41:07,110 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 19 [2022-10-16 04:41:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:07,112 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-10-16 04:41:07,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-10-16 04:41:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:41:07,115 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:07,115 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:07,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:07,326 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,SelfDestructingSolverStorable16 [2022-10-16 04:41:07,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:07,328 INFO L85 PathProgramCache]: Analyzing trace with hash -775616438, now seen corresponding path program 1 times [2022-10-16 04:41:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:07,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651148785] [2022-10-16 04:41:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:07,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651148785] [2022-10-16 04:41:07,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651148785] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:41:07,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:41:07,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 04:41:07,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991637859] [2022-10-16 04:41:07,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:41:07,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:41:07,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:41:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:41:07,454 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:07,500 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-10-16 04:41:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:41:07,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-16 04:41:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:07,501 INFO L225 Difference]: With dead ends: 95 [2022-10-16 04:41:07,502 INFO L226 Difference]: Without dead ends: 95 [2022-10-16 04:41:07,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:41:07,503 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:07,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 106 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:41:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-16 04:41:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2022-10-16 04:41:07,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 82 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-10-16 04:41:07,511 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 20 [2022-10-16 04:41:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:07,512 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-10-16 04:41:07,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-10-16 04:41:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:41:07,516 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:07,516 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] [2022-10-16 04:41:07,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-16 04:41:07,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:07,518 INFO L85 PathProgramCache]: Analyzing trace with hash -777184792, now seen corresponding path program 1 times [2022-10-16 04:41:07,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:07,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109830834] [2022-10-16 04:41:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:07,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:07,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:07,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109830834] [2022-10-16 04:41:07,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109830834] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:41:07,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:41:07,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:41:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418262476] [2022-10-16 04:41:07,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:41:07,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:41:07,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:41:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:41:07,711 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:07,728 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2022-10-16 04:41:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:41:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-16 04:41:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:07,730 INFO L225 Difference]: With dead ends: 82 [2022-10-16 04:41:07,730 INFO L226 Difference]: Without dead ends: 72 [2022-10-16 04:41:07,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:41:07,731 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:07,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:41:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-16 04:41:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-10-16 04:41:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-10-16 04:41:07,734 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 20 [2022-10-16 04:41:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:07,735 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-10-16 04:41:07,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-10-16 04:41:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:41:07,739 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:07,739 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:07,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-16 04:41:07,739 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:07,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1796684792, now seen corresponding path program 1 times [2022-10-16 04:41:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:07,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409681278] [2022-10-16 04:41:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:07,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409681278] [2022-10-16 04:41:07,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409681278] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:41:07,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:41:07,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-16 04:41:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301323630] [2022-10-16 04:41:07,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:41:08,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 04:41:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 04:41:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:41:08,001 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:08,113 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2022-10-16 04:41:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 04:41:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-16 04:41:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:08,115 INFO L225 Difference]: With dead ends: 125 [2022-10-16 04:41:08,115 INFO L226 Difference]: Without dead ends: 94 [2022-10-16 04:41:08,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-10-16 04:41:08,117 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:08,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 126 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:41:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-16 04:41:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-10-16 04:41:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 92 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2022-10-16 04:41:08,125 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 20 [2022-10-16 04:41:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2022-10-16 04:41:08,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2022-10-16 04:41:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:41:08,126 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:08,126 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:08,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-10-16 04:41:08,127 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 909934602, now seen corresponding path program 1 times [2022-10-16 04:41:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:08,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735099528] [2022-10-16 04:41:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:08,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:08,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735099528] [2022-10-16 04:41:08,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735099528] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:08,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844519659] [2022-10-16 04:41:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:08,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:08,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:08,536 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) [2022-10-16 04:41:08,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 04:41:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-16 04:41:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:08,625 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 [2022-10-16 04:41:08,843 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:08,844 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 20 treesize of output 17 [2022-10-16 04:41:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:08,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:09,255 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 13 treesize of output 11 [2022-10-16 04:41:09,261 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 22 treesize of output 20 [2022-10-16 04:41:09,266 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 35 treesize of output 27 [2022-10-16 04:41:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:09,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844519659] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:09,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:09,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-10-16 04:41:09,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403066780] [2022-10-16 04:41:09,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:09,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-10-16 04:41:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-10-16 04:41:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-10-16 04:41:09,281 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) [2022-10-16 04:41:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:09,535 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2022-10-16 04:41:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 04:41:09,535 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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 20 [2022-10-16 04:41:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:09,536 INFO L225 Difference]: With dead ends: 104 [2022-10-16 04:41:09,536 INFO L226 Difference]: Without dead ends: 104 [2022-10-16 04:41:09,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-10-16 04:41:09,538 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:09,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 155 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-10-16 04:41:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-10-16 04:41:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-10-16 04:41:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.168421052631579) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2022-10-16 04:41:09,542 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 20 [2022-10-16 04:41:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:09,542 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2022-10-16 04:41:09,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) [2022-10-16 04:41:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2022-10-16 04:41:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 04:41:09,543 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:09,543 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:09,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:09,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:09,744 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1947311386, now seen corresponding path program 2 times [2022-10-16 04:41:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:09,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970077408] [2022-10-16 04:41:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:11,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970077408] [2022-10-16 04:41:11,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970077408] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916287150] [2022-10-16 04:41:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:41:11,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:11,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:11,771 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) [2022-10-16 04:41:11,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 04:41:11,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:41:11,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:11,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 77 conjunts are in the unsatisfiable core [2022-10-16 04:41:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:11,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:11,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:41:12,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-10-16 04:41:12,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 22 [2022-10-16 04:41:13,847 INFO L356 Elim1Store]: treesize reduction 20, result has 74.4 percent of original size [2022-10-16 04:41:13,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 84 [2022-10-16 04:41:13,880 WARN L712 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-10-16 04:41:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:15,876 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_290 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_~d~0#1.offset_65| Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (<= (+ 8 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65| 1)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65|) (= (select .cse0 (+ 2 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65|)) 0) (= (select .cse0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65|) 0) (= (select .cse0 (+ 3 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65|)) 0) (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65| 4)) 0) (= (select .cse0 (+ 5 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_65|))))) is different from false [2022-10-16 04:41:15,895 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:15,896 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 85 [2022-10-16 04:41:15,930 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:15,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 195 [2022-10-16 04:41:15,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2022-10-16 04:41:16,120 WARN L712 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-10-16 04:41:16,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:41:16,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:16,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916287150] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:16,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:16,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 58 [2022-10-16 04:41:16,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47848796] [2022-10-16 04:41:16,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:16,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-10-16 04:41:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-10-16 04:41:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2977, Unknown=1, NotChecked=112, Total=3422 [2022-10-16 04:41:16,497 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:20,107 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2022-10-16 04:41:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-10-16 04:41:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2022-10-16 04:41:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:20,111 INFO L225 Difference]: With dead ends: 216 [2022-10-16 04:41:20,111 INFO L226 Difference]: Without dead ends: 189 [2022-10-16 04:41:20,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=626, Invalid=5229, Unknown=1, NotChecked=150, Total=6006 [2022-10-16 04:41:20,115 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:20,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 502 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 505 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2022-10-16 04:41:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-10-16 04:41:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 135. [2022-10-16 04:41:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.16793893129771) internal successors, (153), 134 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2022-10-16 04:41:20,120 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 25 [2022-10-16 04:41:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:20,120 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2022-10-16 04:41:20,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2022-10-16 04:41:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 04:41:20,121 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:20,121 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] [2022-10-16 04:41:20,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:20,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:20,335 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash -864315173, now seen corresponding path program 1 times [2022-10-16 04:41:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948159369] [2022-10-16 04:41:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:20,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948159369] [2022-10-16 04:41:20,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948159369] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645201421] [2022-10-16 04:41:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:20,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:20,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:20,747 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) [2022-10-16 04:41:20,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 04:41:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 52 conjunts are in the unsatisfiable core [2022-10-16 04:41:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:20,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:20,863 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:20,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:20,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:21,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:21,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:41:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:21,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645201421] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:21,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:21,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2022-10-16 04:41:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650531551] [2022-10-16 04:41:21,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:21,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-16 04:41:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-16 04:41:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-10-16 04:41:21,729 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:23,136 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-10-16 04:41:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-16 04:41:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-10-16 04:41:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:23,138 INFO L225 Difference]: With dead ends: 169 [2022-10-16 04:41:23,138 INFO L226 Difference]: Without dead ends: 167 [2022-10-16 04:41:23,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2022-10-16 04:41:23,140 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:23,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 218 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 323 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-10-16 04:41:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-10-16 04:41:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-10-16 04:41:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 154 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-10-16 04:41:23,145 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 25 [2022-10-16 04:41:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:23,145 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-10-16 04:41:23,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-10-16 04:41:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:41:23,147 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:23,147 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:23,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:23,360 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,SelfDestructingSolverStorable22 [2022-10-16 04:41:23,361 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1023965353, now seen corresponding path program 2 times [2022-10-16 04:41:23,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:23,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924960031] [2022-10-16 04:41:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:23,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:24,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:24,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924960031] [2022-10-16 04:41:24,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924960031] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:24,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511624569] [2022-10-16 04:41:24,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:41:24,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:24,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:24,070 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) [2022-10-16 04:41:24,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 04:41:24,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:41:24,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 64 conjunts are in the unsatisfiable core [2022-10-16 04:41:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:24,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:24,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:41:24,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 04:41:24,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 20 [2022-10-16 04:41:24,448 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:24,448 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 21 treesize of output 17 [2022-10-16 04:41:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:24,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:25,130 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:25,131 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-10-16 04:41:25,138 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:25,139 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 37 treesize of output 32 [2022-10-16 04:41:25,150 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 7 treesize of output 3 [2022-10-16 04:41:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:25,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511624569] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:25,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:25,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-10-16 04:41:25,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763098483] [2022-10-16 04:41:25,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:25,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-16 04:41:25,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-16 04:41:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1053, Unknown=1, NotChecked=0, Total=1190 [2022-10-16 04:41:25,222 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:26,406 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2022-10-16 04:41:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 04:41:26,406 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2022-10-16 04:41:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:26,407 INFO L225 Difference]: With dead ends: 164 [2022-10-16 04:41:26,407 INFO L226 Difference]: Without dead ends: 164 [2022-10-16 04:41:26,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=420, Invalid=2441, Unknown=1, NotChecked=0, Total=2862 [2022-10-16 04:41:26,409 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:26,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 245 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 296 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-10-16 04:41:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-10-16 04:41:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-10-16 04:41:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 154 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2022-10-16 04:41:26,414 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 26 [2022-10-16 04:41:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:26,414 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2022-10-16 04:41:26,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2022-10-16 04:41:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:41:26,415 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:26,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:26,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-10-16 04:41:26,628 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:26,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1678154874, now seen corresponding path program 1 times [2022-10-16 04:41:26,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:26,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725547156] [2022-10-16 04:41:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:26,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725547156] [2022-10-16 04:41:27,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725547156] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611938236] [2022-10-16 04:41:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:27,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:27,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:27,118 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) [2022-10-16 04:41:27,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-16 04:41:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 77 conjunts are in the unsatisfiable core [2022-10-16 04:41:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:27,240 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:27,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:27,286 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 6 treesize of output 5 [2022-10-16 04:41:27,499 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:27,499 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 15 treesize of output 15 [2022-10-16 04:41:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:27,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:28,403 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 24 treesize of output 20 [2022-10-16 04:41:28,411 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:28,412 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 26 treesize of output 30 [2022-10-16 04:41:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:28,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611938236] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:28,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:28,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 39 [2022-10-16 04:41:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942466126] [2022-10-16 04:41:28,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:28,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-10-16 04:41:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-10-16 04:41:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2022-10-16 04:41:28,534 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 40 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:30,269 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2022-10-16 04:41:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 04:41:30,270 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-16 04:41:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:30,270 INFO L225 Difference]: With dead ends: 165 [2022-10-16 04:41:30,271 INFO L226 Difference]: Without dead ends: 165 [2022-10-16 04:41:30,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2022-10-16 04:41:30,273 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 254 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:30,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 167 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 274 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-10-16 04:41:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-10-16 04:41:30,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2022-10-16 04:41:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 158 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2022-10-16 04:41:30,277 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 27 [2022-10-16 04:41:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:30,278 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2022-10-16 04:41:30,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2022-10-16 04:41:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-16 04:41:30,278 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:30,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:30,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:30,485 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 [2022-10-16 04:41:30,486 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1969626676, now seen corresponding path program 1 times [2022-10-16 04:41:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:30,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571585341] [2022-10-16 04:41:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:30,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:31,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571585341] [2022-10-16 04:41:31,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571585341] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758142143] [2022-10-16 04:41:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:31,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:31,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:31,152 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) [2022-10-16 04:41:31,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-16 04:41:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 68 conjunts are in the unsatisfiable core [2022-10-16 04:41:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:31,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:31,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:41:31,318 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 13 treesize of output 9 [2022-10-16 04:41:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:31,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 18 [2022-10-16 04:41:31,955 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:31,956 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 17 treesize of output 17 [2022-10-16 04:41:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:32,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:33,220 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:33,221 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-10-16 04:41:33,231 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:33,231 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 33 treesize of output 34 [2022-10-16 04:41:33,238 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 9 treesize of output 7 [2022-10-16 04:41:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:41:33,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:33,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758142143] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:33,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:33,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 39 [2022-10-16 04:41:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411380115] [2022-10-16 04:41:33,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-10-16 04:41:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-10-16 04:41:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2022-10-16 04:41:33,417 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 40 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) [2022-10-16 04:41:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:34,747 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2022-10-16 04:41:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-16 04:41:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 40 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 27 [2022-10-16 04:41:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:34,749 INFO L225 Difference]: With dead ends: 173 [2022-10-16 04:41:34,749 INFO L226 Difference]: Without dead ends: 172 [2022-10-16 04:41:34,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=245, Invalid=2947, Unknown=0, NotChecked=0, Total=3192 [2022-10-16 04:41:34,751 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:34,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 374 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-10-16 04:41:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-10-16 04:41:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-10-16 04:41:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 170 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2022-10-16 04:41:34,756 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 27 [2022-10-16 04:41:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:34,756 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2022-10-16 04:41:34,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 40 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) [2022-10-16 04:41:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2022-10-16 04:41:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 04:41:34,757 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:34,757 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:34,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:34,970 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 [2022-10-16 04:41:34,970 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:34,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash 928886046, now seen corresponding path program 1 times [2022-10-16 04:41:34,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:34,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075847374] [2022-10-16 04:41:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:41:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075847374] [2022-10-16 04:41:35,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075847374] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:35,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970975525] [2022-10-16 04:41:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:35,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:35,720 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) [2022-10-16 04:41:35,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 04:41:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 54 conjunts are in the unsatisfiable core [2022-10-16 04:41:35,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:35,833 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:35,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:35,862 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 16 treesize of output 12 [2022-10-16 04:41:36,126 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:36,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-10-16 04:41:36,135 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 9 treesize of output 3 [2022-10-16 04:41:36,319 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:36,319 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 25 treesize of output 21 [2022-10-16 04:41:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:36,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:37,741 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:37,742 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-10-16 04:41:37,753 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:37,753 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 37 treesize of output 36 [2022-10-16 04:41:37,760 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 11 treesize of output 7 [2022-10-16 04:41:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:37,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970975525] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:37,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:37,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2022-10-16 04:41:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867887305] [2022-10-16 04:41:37,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:37,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-10-16 04:41:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:37,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-10-16 04:41:37,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1615, Unknown=37, NotChecked=0, Total=1806 [2022-10-16 04:41:37,952 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 43 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:40,083 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) (.cse2 (select |c_#length| |c_ULTIMATE.start_cstrncat_~s~0#1.base|))) (let ((.cse5 (<= .cse3 .cse2)) (.cse4 (<= (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2) .cse2)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)) (.cse0 (= |c_ULTIMATE.start_cstrncat_~s~0#1.base| |c_ULTIMATE.start_cstrncat_~d~0#1.base|)) (.cse8 (<= |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) (.cse7 (+ |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse6 (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 1 |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) (or .cse0 (= (select .cse1 (+ (- 1) .cse2)) 0)) (or (forall ((|ULTIMATE.start_cstrncat_~d~0#1.base| Int) (v_ArrVal_445 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_445) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0) (< (select |c_#length| |ULTIMATE.start_cstrncat_~d~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 2)))) (and (<= 0 .cse3) .cse4) (not .cse5)) (<= 2 |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) (or (<= .cse6 |c_ULTIMATE.start_main_~length2~0#1|) (not (<= .cse7 1))) (or (<= |c_ULTIMATE.start_main_~length2~0#1| .cse6) (<= .cse7 2)) .cse5 (<= 0 |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) .cse8 (or (<= .cse2 |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) .cse4 (and (= (select .cse1 1) 0) (not .cse0) .cse8)) (or (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (not (= 2 .cse7))) (= |c_ULTIMATE.start_main_~length2~0#1| .cse6)))) is different from false [2022-10-16 04:41:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:41,620 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-10-16 04:41:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-16 04:41:41,621 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 43 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-10-16 04:41:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:41,622 INFO L225 Difference]: With dead ends: 192 [2022-10-16 04:41:41,622 INFO L226 Difference]: Without dead ends: 192 [2022-10-16 04:41:41,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=572, Invalid=4506, Unknown=38, NotChecked=140, Total=5256 [2022-10-16 04:41:41,626 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 191 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:41,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 342 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 503 Invalid, 0 Unknown, 194 Unchecked, 0.4s Time] [2022-10-16 04:41:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-10-16 04:41:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2022-10-16 04:41:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 182 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 207 transitions. [2022-10-16 04:41:41,634 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 207 transitions. Word has length 28 [2022-10-16 04:41:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:41,635 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 207 transitions. [2022-10-16 04:41:41,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 43 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 207 transitions. [2022-10-16 04:41:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 04:41:41,636 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:41,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:41,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:41,847 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 [2022-10-16 04:41:41,848 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1269303649, now seen corresponding path program 1 times [2022-10-16 04:41:41,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:41,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821569845] [2022-10-16 04:41:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:42,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:42,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821569845] [2022-10-16 04:41:42,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821569845] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:42,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419160588] [2022-10-16 04:41:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:42,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:42,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:42,399 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) [2022-10-16 04:41:42,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 04:41:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:42,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 60 conjunts are in the unsatisfiable core [2022-10-16 04:41:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:42,509 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:42,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:42,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:42,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:41:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:43,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419160588] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:43,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:43,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-10-16 04:41:43,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437821634] [2022-10-16 04:41:43,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:43,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-16 04:41:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-16 04:41:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:41:43,617 INFO L87 Difference]: Start difference. First operand 183 states and 207 transitions. Second operand has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:45,568 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2022-10-16 04:41:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-16 04:41:45,569 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 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 29 [2022-10-16 04:41:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:45,570 INFO L225 Difference]: With dead ends: 204 [2022-10-16 04:41:45,571 INFO L226 Difference]: Without dead ends: 204 [2022-10-16 04:41:45,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=675, Invalid=3107, Unknown=0, NotChecked=0, Total=3782 [2022-10-16 04:41:45,573 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 244 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:45,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 290 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 404 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-10-16 04:41:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-10-16 04:41:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 191. [2022-10-16 04:41:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 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) [2022-10-16 04:41:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-10-16 04:41:45,580 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 29 [2022-10-16 04:41:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:45,580 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-10-16 04:41:45,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-10-16 04:41:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 04:41:45,581 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:45,581 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:45,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:45,794 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 [2022-10-16 04:41:45,794 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1916489395, now seen corresponding path program 2 times [2022-10-16 04:41:45,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:45,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115751929] [2022-10-16 04:41:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:45,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:46,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115751929] [2022-10-16 04:41:46,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115751929] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351604500] [2022-10-16 04:41:46,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:41:46,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:46,918 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) [2022-10-16 04:41:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-16 04:41:47,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:41:47,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 72 conjunts are in the unsatisfiable core [2022-10-16 04:41:47,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:47,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:47,038 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:47,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:47,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:47,110 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 17 treesize of output 13 [2022-10-16 04:41:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:47,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 22 [2022-10-16 04:41:47,450 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:47,451 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 21 treesize of output 20 [2022-10-16 04:41:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:48,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:50,029 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:50,029 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-10-16 04:41:50,039 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:50,039 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 36 treesize of output 35 [2022-10-16 04:41:50,046 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 9 treesize of output 7 [2022-10-16 04:41:50,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:41:50,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:50,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351604500] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:50,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:50,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 52 [2022-10-16 04:41:50,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194048243] [2022-10-16 04:41:50,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:50,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-10-16 04:41:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:50,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-10-16 04:41:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2547, Unknown=1, NotChecked=0, Total=2756 [2022-10-16 04:41:50,364 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 53 states, 52 states have (on average 1.5) internal successors, (78), 53 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:53,035 INFO L93 Difference]: Finished difference Result 205 states and 230 transitions. [2022-10-16 04:41:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-16 04:41:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.5) internal successors, (78), 53 states have internal predecessors, (78), 0 states have call successors, (0), 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 29 [2022-10-16 04:41:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:53,037 INFO L225 Difference]: With dead ends: 205 [2022-10-16 04:41:53,037 INFO L226 Difference]: Without dead ends: 204 [2022-10-16 04:41:53,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=420, Invalid=5129, Unknown=1, NotChecked=0, Total=5550 [2022-10-16 04:41:53,040 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:53,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 287 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 536 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-10-16 04:41:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-10-16 04:41:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-10-16 04:41:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 199 states have (on average 1.1457286432160805) internal successors, (228), 202 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2022-10-16 04:41:53,045 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 29 [2022-10-16 04:41:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:53,046 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2022-10-16 04:41:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.5) internal successors, (78), 53 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2022-10-16 04:41:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:41:53,047 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:53,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:53,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:53,257 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 [2022-10-16 04:41:53,257 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:41:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:53,259 INFO L85 PathProgramCache]: Analyzing trace with hash 794699640, now seen corresponding path program 2 times [2022-10-16 04:41:53,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:53,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705586719] [2022-10-16 04:41:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:54,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705586719] [2022-10-16 04:41:54,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705586719] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:54,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279580202] [2022-10-16 04:41:54,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:41:54,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:54,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:54,058 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) [2022-10-16 04:41:54,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-16 04:41:54,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:41:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 73 conjunts are in the unsatisfiable core [2022-10-16 04:41:54,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:54,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:41:54,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:41:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:54,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:41:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:56,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279580202] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:56,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:56,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-10-16 04:41:56,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878192696] [2022-10-16 04:41:56,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:56,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-10-16 04:41:56,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:56,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-10-16 04:41:56,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2022-10-16 04:41:56,107 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand has 48 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:59,831 INFO L93 Difference]: Finished difference Result 224 states and 250 transitions. [2022-10-16 04:41:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-10-16 04:41:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 04:41:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:59,833 INFO L225 Difference]: With dead ends: 224 [2022-10-16 04:41:59,834 INFO L226 Difference]: Without dead ends: 224 [2022-10-16 04:41:59,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1081, Invalid=6229, Unknown=0, NotChecked=0, Total=7310 [2022-10-16 04:41:59,835 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 264 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:59,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 257 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 746 Invalid, 0 Unknown, 39 Unchecked, 0.7s Time] [2022-10-16 04:41:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-10-16 04:41:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 191. [2022-10-16 04:41:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 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) [2022-10-16 04:41:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-10-16 04:41:59,841 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 31 [2022-10-16 04:41:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:59,841 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-10-16 04:41:59,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-10-16 04:41:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:41:59,842 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:59,843 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:59,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:00,047 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 [2022-10-16 04:42:00,048 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:42:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash 147513894, now seen corresponding path program 3 times [2022-10-16 04:42:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:00,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338011832] [2022-10-16 04:42:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:02,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338011832] [2022-10-16 04:42:02,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338011832] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371280287] [2022-10-16 04:42:02,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:42:02,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:02,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:02,067 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) [2022-10-16 04:42:02,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-16 04:42:02,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:42:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:02,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 88 conjunts are in the unsatisfiable core [2022-10-16 04:42:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:02,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:02,376 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:42:02,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:42:02,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:42:02,481 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 17 treesize of output 13 [2022-10-16 04:42:02,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:02,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 26 [2022-10-16 04:42:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:14,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-10-16 04:42:14,085 INFO L356 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2022-10-16 04:42:14,086 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 18 treesize of output 17 [2022-10-16 04:42:14,962 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:42:14,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 84 [2022-10-16 04:42:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:15,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:23,095 INFO L356 Elim1Store]: treesize reduction 113, result has 23.1 percent of original size [2022-10-16 04:42:23,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 91 [2022-10-16 04:42:23,159 INFO L356 Elim1Store]: treesize reduction 31, result has 56.3 percent of original size [2022-10-16 04:42:23,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 68 [2022-10-16 04:42:23,173 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 9 treesize of output 7 [2022-10-16 04:42:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:42:24,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:42:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:24,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371280287] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:24,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:24,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 61 [2022-10-16 04:42:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484790933] [2022-10-16 04:42:24,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:24,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-10-16 04:42:24,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-10-16 04:42:24,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3555, Unknown=20, NotChecked=0, Total=3782 [2022-10-16 04:42:24,546 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 62 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:40,481 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 79 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:42:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:51,165 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2022-10-16 04:42:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-10-16 04:42:51,166 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 04:42:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:51,168 INFO L225 Difference]: With dead ends: 226 [2022-10-16 04:42:51,168 INFO L226 Difference]: Without dead ends: 223 [2022-10-16 04:42:51,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=612, Invalid=9665, Unknown=25, NotChecked=0, Total=10302 [2022-10-16 04:42:51,171 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:51,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 268 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 394 Invalid, 0 Unknown, 385 Unchecked, 0.4s Time] [2022-10-16 04:42:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-10-16 04:42:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2022-10-16 04:42:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.1336405529953917) internal successors, (246), 220 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 246 transitions. [2022-10-16 04:42:51,176 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 246 transitions. Word has length 31 [2022-10-16 04:42:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:51,177 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 246 transitions. [2022-10-16 04:42:51,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 62 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 246 transitions. [2022-10-16 04:42:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-16 04:42:51,178 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:51,178 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:51,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:51,389 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 [2022-10-16 04:42:51,389 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:42:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:51,390 INFO L85 PathProgramCache]: Analyzing trace with hash -867098396, now seen corresponding path program 3 times [2022-10-16 04:42:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:51,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811523379] [2022-10-16 04:42:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:51,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811523379] [2022-10-16 04:42:52,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811523379] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:52,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607363871] [2022-10-16 04:42:52,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:42:52,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:52,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:52,094 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) [2022-10-16 04:42:52,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-16 04:42:52,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:42:52,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 89 conjunts are in the unsatisfiable core [2022-10-16 04:42:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:52,252 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:42:52,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:42:52,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:42:52,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 04:42:52,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 20 [2022-10-16 04:42:52,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 20 [2022-10-16 04:42:52,685 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:42:52,686 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 21 treesize of output 17 [2022-10-16 04:42:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:52,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:53,493 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:42:53,493 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-10-16 04:42:53,501 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:42:53,501 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 37 treesize of output 32 [2022-10-16 04:42:53,506 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 7 treesize of output 3 [2022-10-16 04:42:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:53,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607363871] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:53,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:53,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 38 [2022-10-16 04:42:53,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852568126] [2022-10-16 04:42:53,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:53,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-16 04:42:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-16 04:42:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1316, Unknown=1, NotChecked=0, Total=1482 [2022-10-16 04:42:53,602 INFO L87 Difference]: Start difference. First operand 221 states and 246 transitions. Second operand has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:55,779 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2022-10-16 04:42:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-16 04:42:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 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 32 [2022-10-16 04:42:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:55,782 INFO L225 Difference]: With dead ends: 233 [2022-10-16 04:42:55,782 INFO L226 Difference]: Without dead ends: 233 [2022-10-16 04:42:55,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=608, Invalid=3297, Unknown=1, NotChecked=0, Total=3906 [2022-10-16 04:42:55,783 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 154 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:55,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 302 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 344 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-10-16 04:42:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-10-16 04:42:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 227. [2022-10-16 04:42:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 226 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2022-10-16 04:42:55,789 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 32 [2022-10-16 04:42:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:55,790 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2022-10-16 04:42:55,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2022-10-16 04:42:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-16 04:42:55,791 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:55,791 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:55,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:56,006 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 [2022-10-16 04:42:56,006 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:42:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 26969617, now seen corresponding path program 3 times [2022-10-16 04:42:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:56,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301611673] [2022-10-16 04:42:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:56,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:56,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301611673] [2022-10-16 04:42:56,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301611673] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:56,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211212708] [2022-10-16 04:42:56,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:42:56,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:56,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:56,999 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) [2022-10-16 04:42:57,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-16 04:42:57,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:42:57,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:57,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 84 conjunts are in the unsatisfiable core [2022-10-16 04:42:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:57,160 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:42:57,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:42:57,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:42:57,237 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 17 treesize of output 13 [2022-10-16 04:42:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:57,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 22 [2022-10-16 04:42:57,770 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:42:57,770 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 21 treesize of output 20 [2022-10-16 04:42:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:59,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:01,044 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:43:01,045 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-10-16 04:43:01,059 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:43:01,059 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 36 treesize of output 35 [2022-10-16 04:43:01,068 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 9 treesize of output 7 [2022-10-16 04:43:01,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:01,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:43:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211212708] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:43:01,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:43:01,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 55 [2022-10-16 04:43:01,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700959586] [2022-10-16 04:43:01,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:01,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-10-16 04:43:01,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-10-16 04:43:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2825, Unknown=0, NotChecked=0, Total=3080 [2022-10-16 04:43:01,415 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand has 56 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 56 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:06,895 INFO L93 Difference]: Finished difference Result 247 states and 272 transitions. [2022-10-16 04:43:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-10-16 04:43:06,899 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 56 states have internal predecessors, (90), 0 states have call successors, (0), 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 33 [2022-10-16 04:43:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:06,900 INFO L225 Difference]: With dead ends: 247 [2022-10-16 04:43:06,900 INFO L226 Difference]: Without dead ends: 247 [2022-10-16 04:43:06,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=794, Invalid=8518, Unknown=0, NotChecked=0, Total=9312 [2022-10-16 04:43:06,902 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:06,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 250 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 925 Invalid, 0 Unknown, 157 Unchecked, 0.8s Time] [2022-10-16 04:43:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-10-16 04:43:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 209. [2022-10-16 04:43:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.1414634146341462) internal successors, (234), 208 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2022-10-16 04:43:06,908 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 33 [2022-10-16 04:43:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:06,908 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2022-10-16 04:43:06,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 56 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2022-10-16 04:43:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-16 04:43:06,910 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:06,910 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:06,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-10-16 04:43:07,120 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 [2022-10-16 04:43:07,120 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:43:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 972792426, now seen corresponding path program 4 times [2022-10-16 04:43:07,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:07,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610344930] [2022-10-16 04:43:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:08,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610344930] [2022-10-16 04:43:08,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610344930] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268152967] [2022-10-16 04:43:08,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 04:43:08,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:08,672 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) [2022-10-16 04:43:08,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-16 04:43:08,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 04:43:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 90 conjunts are in the unsatisfiable core [2022-10-16 04:43:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:08,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:08,805 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:43:08,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:43:08,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:43:08,890 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 17 treesize of output 13 [2022-10-16 04:43:08,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:08,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 22 [2022-10-16 04:43:09,710 INFO L356 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2022-10-16 04:43:09,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 32 [2022-10-16 04:43:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:11,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:13,868 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:43:13,868 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-10-16 04:43:13,886 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:43:13,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 69 [2022-10-16 04:43:13,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-10-16 04:43:14,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:14,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:43:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:14,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268152967] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:43:14,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:43:14,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 64 [2022-10-16 04:43:14,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075939900] [2022-10-16 04:43:14,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-10-16 04:43:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-10-16 04:43:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3901, Unknown=1, NotChecked=0, Total=4160 [2022-10-16 04:43:14,318 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 65 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:19,348 INFO L93 Difference]: Finished difference Result 239 states and 264 transitions. [2022-10-16 04:43:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-10-16 04:43:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.5) internal successors, (96), 65 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-10-16 04:43:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:19,350 INFO L225 Difference]: With dead ends: 239 [2022-10-16 04:43:19,350 INFO L226 Difference]: Without dead ends: 239 [2022-10-16 04:43:19,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=630, Invalid=8875, Unknown=1, NotChecked=0, Total=9506 [2022-10-16 04:43:19,352 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:19,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 361 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 812 Invalid, 0 Unknown, 181 Unchecked, 0.7s Time] [2022-10-16 04:43:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-10-16 04:43:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 224. [2022-10-16 04:43:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 220 states have (on average 1.1363636363636365) internal successors, (250), 223 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 250 transitions. [2022-10-16 04:43:19,358 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 250 transitions. Word has length 35 [2022-10-16 04:43:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:19,358 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 250 transitions. [2022-10-16 04:43:19,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.5) internal successors, (96), 65 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 250 transitions. [2022-10-16 04:43:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-16 04:43:19,359 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:19,360 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:19,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:19,573 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 [2022-10-16 04:43:19,573 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:43:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash 325606680, now seen corresponding path program 4 times [2022-10-16 04:43:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:19,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376028605] [2022-10-16 04:43:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:19,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:21,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376028605] [2022-10-16 04:43:21,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376028605] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892926687] [2022-10-16 04:43:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-16 04:43:21,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:21,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:21,225 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) [2022-10-16 04:43:21,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-10-16 04:43:21,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-16 04:43:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 110 conjunts are in the unsatisfiable core [2022-10-16 04:43:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:21,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:43:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:21,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:43:21,548 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 17 treesize of output 13 [2022-10-16 04:43:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:21,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 26 [2022-10-16 04:43:23,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:23,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2022-10-16 04:43:23,921 INFO L356 Elim1Store]: treesize reduction 12, result has 69.2 percent of original size [2022-10-16 04:43:23,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 42 [2022-10-16 04:43:25,027 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:43:25,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 89 [2022-10-16 04:43:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:26,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:30,941 INFO L356 Elim1Store]: treesize reduction 269, result has 17.2 percent of original size [2022-10-16 04:43:30,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 207 [2022-10-16 04:43:30,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:30,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:30,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:31,047 INFO L356 Elim1Store]: treesize reduction 61, result has 52.7 percent of original size [2022-10-16 04:43:31,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 74 treesize of output 102 [2022-10-16 04:43:31,064 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 9 treesize of output 7 [2022-10-16 04:43:31,250 WARN L712 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-10-16 04:43:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:31,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:43:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:32,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892926687] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:43:32,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:43:32,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 27] total 76 [2022-10-16 04:43:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417541461] [2022-10-16 04:43:32,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:32,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-10-16 04:43:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-10-16 04:43:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=5500, Unknown=11, NotChecked=0, Total=5852 [2022-10-16 04:43:32,030 INFO L87 Difference]: Start difference. First operand 224 states and 250 transitions. Second operand has 77 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 77 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:39,508 INFO L93 Difference]: Finished difference Result 251 states and 276 transitions. [2022-10-16 04:43:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-10-16 04:43:39,509 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 77 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-10-16 04:43:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:39,510 INFO L225 Difference]: With dead ends: 251 [2022-10-16 04:43:39,511 INFO L226 Difference]: Without dead ends: 248 [2022-10-16 04:43:39,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=799, Invalid=12291, Unknown=20, NotChecked=0, Total=13110 [2022-10-16 04:43:39,512 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:39,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 261 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 275 Unchecked, 0.2s Time] [2022-10-16 04:43:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-10-16 04:43:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 242. [2022-10-16 04:43:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 238 states have (on average 1.1218487394957983) internal successors, (267), 241 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 267 transitions. [2022-10-16 04:43:39,518 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 267 transitions. Word has length 35 [2022-10-16 04:43:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:39,519 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 267 transitions. [2022-10-16 04:43:39,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 77 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:43:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 267 transitions. [2022-10-16 04:43:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-16 04:43:39,520 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:39,520 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:39,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:39,733 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 [2022-10-16 04:43:39,733 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-10-16 04:43:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash 108101180, now seen corresponding path program 3 times [2022-10-16 04:43:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118804464] [2022-10-16 04:43:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:39,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:44:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:44:15,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:44:15,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118804464] [2022-10-16 04:44:15,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118804464] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:44:15,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039318545] [2022-10-16 04:44:15,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:44:15,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:44:15,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:44:15,598 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) [2022-10-16 04:44:15,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-10-16 04:44:15,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-10-16 04:44:15,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:44:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 109 conjunts are in the unsatisfiable core [2022-10-16 04:44:15,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:44:15,922 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:44:15,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:44:15,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:44:16,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-10-16 04:44:16,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 22