/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:14:36,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:14:36,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:14:36,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 18:14:36,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 18:14:36,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 18:14:36,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 18:14:36,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 18:14:36,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 18:14:36,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 18:14:36,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 18:14:36,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 18:14:36,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 18:14:36,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 18:14:36,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 18:14:36,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 18:14:36,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 18:14:36,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 18:14:36,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 18:14:36,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 18:14:36,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 18:14:36,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 18:14:36,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 18:14:36,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 18:14:36,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 18:14:36,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:14:36,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:14:36,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:14:36,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 18:14:36,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:14:36,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:14:36,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:14:36,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:14:36,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:14:36,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:14:36,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:14:36,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:14:36,695 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:14:36,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:14:36,696 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:14:36,697 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:14:36,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:14:36,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:14:36,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:14:36,697 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:14:36,698 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:14:36,698 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:14:36,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:14:36,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:14:36,698 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:14:36,698 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:14:36,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:14:36,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:14:36,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:14:36,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:14:36,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:14:36,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:14:36,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:14:36,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:14:36,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:14:37,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:14:37,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:14:37,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:14:37,130 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:14:37,131 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:14:37,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_08.i [2022-10-15 18:14:37,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16a20d7d/ce31150bcbd44f289b4e0364ea5a4b9a/FLAG764158dcb [2022-10-15 18:14:37,762 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:14:37,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i [2022-10-15 18:14:37,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16a20d7d/ce31150bcbd44f289b4e0364ea5a4b9a/FLAG764158dcb [2022-10-15 18:14:38,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16a20d7d/ce31150bcbd44f289b4e0364ea5a4b9a [2022-10-15 18:14:38,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:14:38,135 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:14:38,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:14:38,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:14:38,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:14:38,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c4f162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38, skipping insertion in model container [2022-10-15 18:14:38,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:14:38,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:14:38,342 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2022-10-15 18:14:38,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:14:38,377 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:14:38,392 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2022-10-15 18:14:38,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:14:38,418 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:14:38,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38 WrapperNode [2022-10-15 18:14:38,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:14:38,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:14:38,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:14:38,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:14:38,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,474 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-10-15 18:14:38,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:14:38,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:14:38,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:14:38,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:14:38,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,528 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:14:38,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:14:38,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:14:38,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:14:38,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (1/1) ... [2022-10-15 18:14:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:14:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:38,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 18:14:38,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 18:14:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:14:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:14:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:14:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:14:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:14:38,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:14:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:14:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:14:38,796 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:14:38,798 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:14:39,067 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:14:39,085 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:14:39,088 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-15 18:14:39,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:14:39 BoogieIcfgContainer [2022-10-15 18:14:39,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:14:39,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:14:39,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:14:39,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:14:39,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:14:38" (1/3) ... [2022-10-15 18:14:39,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d73e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:14:39, skipping insertion in model container [2022-10-15 18:14:39,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:14:38" (2/3) ... [2022-10-15 18:14:39,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d73e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:14:39, skipping insertion in model container [2022-10-15 18:14:39,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:14:39" (3/3) ... [2022-10-15 18:14:39,119 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2022-10-15 18:14:39,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:14:39,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-10-15 18:14:39,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:14:39,271 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;@3b27bfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:14:39,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-10-15 18:14:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 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) [2022-10-15 18:14:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:14:39,336 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:39,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:14:39,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash 925797, now seen corresponding path program 1 times [2022-10-15 18:14:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:39,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673383723] [2022-10-15 18:14:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:39,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:39,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:39,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673383723] [2022-10-15 18:14:39,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673383723] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:39,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:14:39,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:14:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321836889] [2022-10-15 18:14:39,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:39,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:39,725 INFO L87 Difference]: Start difference. First operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:39,785 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-10-15 18:14:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:39,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:14:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:39,799 INFO L225 Difference]: With dead ends: 31 [2022-10-15 18:14:39,800 INFO L226 Difference]: Without dead ends: 29 [2022-10-15 18:14:39,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:39,807 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:39,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:14:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-15 18:14:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-15 18:14:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-10-15 18:14:39,855 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 4 [2022-10-15 18:14:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:39,856 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-10-15 18:14:39,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-10-15 18:14:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:14:39,857 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:39,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:14:39,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:14:39,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2022-10-15 18:14:39,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:39,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219687374] [2022-10-15 18:14:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:39,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:40,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219687374] [2022-10-15 18:14:40,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219687374] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:40,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:14:40,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:14:40,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329763650] [2022-10-15 18:14:40,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:40,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:40,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:40,084 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:40,142 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-10-15 18:14:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 18:14:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:40,144 INFO L225 Difference]: With dead ends: 32 [2022-10-15 18:14:40,144 INFO L226 Difference]: Without dead ends: 32 [2022-10-15 18:14:40,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:14:40,147 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:40,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-15 18:14:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-10-15 18:14:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-10-15 18:14:40,156 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 4 [2022-10-15 18:14:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:40,157 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-10-15 18:14:40,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-10-15 18:14:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 18:14:40,158 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:40,159 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-10-15 18:14:40,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:14:40,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1810599630, now seen corresponding path program 1 times [2022-10-15 18:14:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:40,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148133290] [2022-10-15 18:14:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:40,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148133290] [2022-10-15 18:14:40,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148133290] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592968266] [2022-10-15 18:14:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:40,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:40,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:40,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:40,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:14:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:14:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:40,582 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 18:14:40,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 18:14:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:40,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:40,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592968266] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:40,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:40,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 18:14:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363911405] [2022-10-15 18:14:40,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:40,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:14:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:14:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:14:40,744 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:40,966 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2022-10-15 18:14:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 18:14:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 18:14:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:40,968 INFO L225 Difference]: With dead ends: 71 [2022-10-15 18:14:40,968 INFO L226 Difference]: Without dead ends: 71 [2022-10-15 18:14:40,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:14:40,971 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:40,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 34 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-15 18:14:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2022-10-15 18:14:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-10-15 18:14:40,981 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 7 [2022-10-15 18:14:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:40,982 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-10-15 18:14:40,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:40,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-10-15 18:14:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-15 18:14:40,983 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:40,983 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:41,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:41,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:41,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1447545997, now seen corresponding path program 1 times [2022-10-15 18:14:41,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:41,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102705105] [2022-10-15 18:14:41,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:41,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:41,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102705105] [2022-10-15 18:14:41,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102705105] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:41,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312663921] [2022-10-15 18:14:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:41,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:41,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:41,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:14:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:41,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:14:41,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:41,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:41,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312663921] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:41,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:41,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-10-15 18:14:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070683827] [2022-10-15 18:14:41,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:41,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 18:14:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 18:14:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:14:41,683 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2022-10-15 18:14:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:41,791 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-10-15 18:14:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 18:14:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) Word has length 19 [2022-10-15 18:14:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:41,793 INFO L225 Difference]: With dead ends: 89 [2022-10-15 18:14:41,793 INFO L226 Difference]: Without dead ends: 89 [2022-10-15 18:14:41,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:14:41,795 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:41,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 129 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:14:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-15 18:14:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-10-15 18:14:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.25) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-10-15 18:14:41,805 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 19 [2022-10-15 18:14:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:41,806 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-10-15 18:14:41,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2022-10-15 18:14:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-10-15 18:14:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 18:14:41,808 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:41,808 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:41,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:42,021 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,SelfDestructingSolverStorable3 [2022-10-15 18:14:42,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash -657080717, now seen corresponding path program 2 times [2022-10-15 18:14:42,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:42,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89404512] [2022-10-15 18:14:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:42,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:42,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89404512] [2022-10-15 18:14:42,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89404512] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:42,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362501169] [2022-10-15 18:14:42,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:42,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:42,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:42,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:42,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:14:42,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:14:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 18:14:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:42,437 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-15 18:14:42,438 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 11 [2022-10-15 18:14:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-10-15 18:14:42,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:14:42,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362501169] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:42,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:14:42,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2022-10-15 18:14:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515220246] [2022-10-15 18:14:42,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:42,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:14:42,543 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:42,564 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-10-15 18:14:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:42,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-15 18:14:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:42,566 INFO L225 Difference]: With dead ends: 65 [2022-10-15 18:14:42,566 INFO L226 Difference]: Without dead ends: 65 [2022-10-15 18:14:42,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-15 18:14:42,568 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:42,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:14:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-15 18:14:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-10-15 18:14:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-10-15 18:14:42,575 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 37 [2022-10-15 18:14:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:42,576 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-10-15 18:14:42,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-10-15 18:14:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-15 18:14:42,578 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:42,578 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:42,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:42,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:42,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash -657080716, now seen corresponding path program 1 times [2022-10-15 18:14:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:42,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137738301] [2022-10-15 18:14:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:43,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:43,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137738301] [2022-10-15 18:14:43,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137738301] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:43,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274676379] [2022-10-15 18:14:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:43,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:43,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:43,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:43,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:14:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-15 18:14:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:43,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:43,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274676379] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:43,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:43,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-15 18:14:43,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448049156] [2022-10-15 18:14:43,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:43,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-15 18:14:43,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:43,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-15 18:14:43,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:14:43,436 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) [2022-10-15 18:14:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:43,626 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-10-15 18:14:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-15 18:14:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 37 [2022-10-15 18:14:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:43,629 INFO L225 Difference]: With dead ends: 149 [2022-10-15 18:14:43,629 INFO L226 Difference]: Without dead ends: 149 [2022-10-15 18:14:43,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-15 18:14:43,630 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 237 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:43,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 138 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:14:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-10-15 18:14:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2022-10-15 18:14:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-10-15 18:14:43,642 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 37 [2022-10-15 18:14:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:43,642 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-10-15 18:14:43,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) [2022-10-15 18:14:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-10-15 18:14:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-15 18:14:43,645 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:43,645 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:43,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:43,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:43,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:43,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1573219212, now seen corresponding path program 2 times [2022-10-15 18:14:43,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:43,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552005792] [2022-10-15 18:14:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:43,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:44,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552005792] [2022-10-15 18:14:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552005792] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077294688] [2022-10-15 18:14:44,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:44,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:44,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:44,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:44,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:14:44,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:14:44,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:14:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:44,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:14:44,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:14:44,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:14:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-10-15 18:14:45,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:14:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077294688] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:45,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:14:45,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [25] total 26 [2022-10-15 18:14:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546798470] [2022-10-15 18:14:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:45,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:14:45,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:14:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:14:45,377 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:45,398 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-10-15 18:14:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:14:45,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-10-15 18:14:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:45,405 INFO L225 Difference]: With dead ends: 121 [2022-10-15 18:14:45,405 INFO L226 Difference]: Without dead ends: 121 [2022-10-15 18:14:45,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-10-15 18:14:45,410 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:45,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:14:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-15 18:14:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-10-15 18:14:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1551724137931034) internal successors, (134), 120 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2022-10-15 18:14:45,437 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 73 [2022-10-15 18:14:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:45,440 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2022-10-15 18:14:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2022-10-15 18:14:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-15 18:14:45,445 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:45,445 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:45,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:45,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:45,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash 556228912, now seen corresponding path program 1 times [2022-10-15 18:14:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:45,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129058044] [2022-10-15 18:14:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:45,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:46,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:46,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129058044] [2022-10-15 18:14:46,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129058044] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:46,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639506333] [2022-10-15 18:14:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:46,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:46,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:14:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-15 18:14:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:46,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:47,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639506333] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:47,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:47,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-10-15 18:14:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222094696] [2022-10-15 18:14:47,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:47,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-15 18:14:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-15 18:14:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:14:47,758 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:48,106 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2022-10-15 18:14:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-15 18:14:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-10-15 18:14:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:48,109 INFO L225 Difference]: With dead ends: 250 [2022-10-15 18:14:48,109 INFO L226 Difference]: Without dead ends: 250 [2022-10-15 18:14:48,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 18:14:48,111 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 379 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:48,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 206 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 18:14:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-10-15 18:14:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 213. [2022-10-15 18:14:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.125) internal successors, (234), 212 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) [2022-10-15 18:14:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 234 transitions. [2022-10-15 18:14:48,121 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 234 transitions. Word has length 77 [2022-10-15 18:14:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:48,122 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 234 transitions. [2022-10-15 18:14:48,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 234 transitions. [2022-10-15 18:14:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-10-15 18:14:48,124 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:48,125 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:48,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-15 18:14:48,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:48,339 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash -341701328, now seen corresponding path program 2 times [2022-10-15 18:14:48,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:48,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90717965] [2022-10-15 18:14:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:48,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90717965] [2022-10-15 18:14:51,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90717965] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076748753] [2022-10-15 18:14:51,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:51,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:51,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:51,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:51,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:14:51,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:14:51,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-15 18:14:51,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:51,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:14:54,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076748753] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:54,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:54,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-10-15 18:14:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221663974] [2022-10-15 18:14:54,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:54,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-10-15 18:14:54,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-10-15 18:14:54,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 18:14:54,424 INFO L87 Difference]: Start difference. First operand 213 states and 234 transitions. Second operand has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:55,262 INFO L93 Difference]: Finished difference Result 484 states and 486 transitions. [2022-10-15 18:14:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-10-15 18:14:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 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 149 [2022-10-15 18:14:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:55,279 INFO L225 Difference]: With dead ends: 484 [2022-10-15 18:14:55,279 INFO L226 Difference]: Without dead ends: 484 [2022-10-15 18:14:55,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 18:14:55,283 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 817 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:55,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 272 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:14:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-10-15 18:14:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 417. [2022-10-15 18:14:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 412 states have (on average 1.1213592233009708) internal successors, (462), 416 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 462 transitions. [2022-10-15 18:14:55,296 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 462 transitions. Word has length 149 [2022-10-15 18:14:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:55,296 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 462 transitions. [2022-10-15 18:14:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:14:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 462 transitions. [2022-10-15 18:14:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-10-15 18:14:55,301 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:55,301 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:55,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:55,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:55,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:14:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1405917904, now seen corresponding path program 3 times [2022-10-15 18:14:55,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:55,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433348339] [2022-10-15 18:14:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:15:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 18:15:05,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:15:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433348339] [2022-10-15 18:15:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433348339] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:15:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640653925] [2022-10-15 18:15:05,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:15:05,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:15:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:15:05,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:15:05,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:15:05,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:15:05,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:15:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-15 18:15:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:15:05,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 18:15:05,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 18:15:05,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 18:15:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-10-15 18:15:07,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:15:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13210 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-10-15 18:15:09,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640653925] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:15:09,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:15:09,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 3, 3] total 101 [2022-10-15 18:15:09,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386808376] [2022-10-15 18:15:09,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:15:09,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-10-15 18:15:09,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:15:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-10-15 18:15:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5432, Unknown=0, NotChecked=0, Total=10100 [2022-10-15 18:15:09,040 INFO L87 Difference]: Start difference. First operand 417 states and 462 transitions. Second operand has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:15:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:15:17,423 INFO L93 Difference]: Finished difference Result 486 states and 488 transitions. [2022-10-15 18:15:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-10-15 18:15:17,424 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 0 states have call successors, (0), 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 293 [2022-10-15 18:15:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:15:17,427 INFO L225 Difference]: With dead ends: 486 [2022-10-15 18:15:17,427 INFO L226 Difference]: Without dead ends: 486 [2022-10-15 18:15:17,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6259 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=15635, Invalid=28255, Unknown=0, NotChecked=0, Total=43890 [2022-10-15 18:15:17,437 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1069 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 18:15:17,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 286 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 18:15:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-10-15 18:15:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 420. [2022-10-15 18:15:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 415 states have (on average 1.1132530120481927) internal successors, (462), 419 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:15:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 462 transitions. [2022-10-15 18:15:17,448 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 462 transitions. Word has length 293 [2022-10-15 18:15:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:15:17,449 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 462 transitions. [2022-10-15 18:15:17,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.1386138613861387) internal successors, (317), 101 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 18:15:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 462 transitions. [2022-10-15 18:15:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-10-15 18:15:17,455 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:15:17,456 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-10-15 18:15:17,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-15 18:15:17,669 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,SelfDestructingSolverStorable9 [2022-10-15 18:15:17,670 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 18:15:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:15:17,671 INFO L85 PathProgramCache]: Analyzing trace with hash 711930364, now seen corresponding path program 4 times [2022-10-15 18:15:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:15:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634453018] [2022-10-15 18:15:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:15:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:15:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:15:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13526 backedges. 0 proven. 13490 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-15 18:15:26,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:15:26,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634453018] [2022-10-15 18:15:26,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634453018] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:15:26,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921207561] [2022-10-15 18:15:26,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-15 18:15:26,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:15:26,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:15:26,055 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:15:26,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process